Document ID: EPA-HQ-OPP-2005-0172-0045
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2005-08-03T04:00Z

II.
D.
1
­
Page
1
of
21
II.
D
Appendices:
Drinking
Water
Exposure
1.
Summary
of
USGS
NAWQA
Monitoring
for
N­
Methyl
Carbamates
The
U.
S.
Geological
Survey
(
USGS)
National
Water
Quality
Assessment
(
NAWQA)
program
has
been
collecting
pesticide
monitoring
data
from
sites
across
the
country
since
1991.
N­
methyl
carbamate
(
NMC)
pesticides
included
in
the
USGS
analytical
methods
include
aldicarb,
aldicarb
sulfoxide,
aldicarb
sulfone,
carbaryl,
carbofuran,
Methiocarb,
methomyl,
oxamyl,
and
propoxur.
With
the
assistance
or
Rick
Bell
of
the
USGS
NAWQA
program,
the
Agency
obtained
all
the
USGS
monitoring
for
these
NMC
pesticides
in
both
ground
water
and
surface
water
through
November
15,
2004.
The
following
tables
provide
summaries
of
reported
NMC
detections
for
each
NAWQA
study
unit
by
land
use
type.

The
NAWQA
study
did
not
focus
on
drinking
water
and
the
monitoring
reflect
a
range
of
ambient
waters.
OPP
tried
to
focus
on
those
sampling
sites
that
fed
into
drinking
water
sources
or
were
reflective
of
drinking
water
sources
in
the
region.
Nor
were
the
study
sites
targeted
to
high
pesticide
or
NMC
use
areas.
The
monitoring
results
are
most
valuable
in
identifying
areas
and
conditions
under
which
NMC
pesticides
may
be
found
in
ambient
waters.
Such
information
is
useful
in
identifying
potential
vulnerable
areas
and
in
evaluating
the
model
estimates
where
monitoring
sites
occur
in
the
same
area
as
the
exposure
scenarios.

a.
Surface
Water
Monitoring
Summary
Figures
II.
D.
1.1
through
!!.
D.
1.4
show
the
NAWQA
Study
Units
in
relation
to
cumulative
carbamate
use
areas.
The
monitoring
data
are
listed
by
the
4­
letter
study
unit
identification
(
SUID)
codes
displayed
on
the
maps.

This
is
only
a
preliminary
summary
of
N­
methyl
carbamate
detections,
grouped
by
study
unit
and
land
use.
For
the
revised
NMC
CRA,
the
Agency
will
revise
this
appendix,
ass
necessary,
to
better
characterize
NAWQA
monitoring
results
and
drinking
water
exposure
estimates
from
the
NMC
CRA.
II.
D.
1
­
Page
2
of
21
FIgure
II.
D.
1.
1
­
NAWQA
Study
Units
in
the
Northwestern
US
in
Relation
to
Cumulative
Carbamate
Use
FIgure
II.
D.
1.
2
­
NAWQA
Study
Units
in
the
Southwestern
US
in
Relation
to
Cumulative
Carbamate
Use
II.
D.
1
­
Page
3
of
21
FIgure
II.
D.
1.
3
­
NAWQA
Study
Units
in
the
Northeastern
US
in
Relation
to
Cumulative
Carbamate
Use
FIgure
II.
D.
1.
4
­
NAWQA
Study
Units
in
the
Southeastern
US
in
Relation
to
Cumulative
Carbamate
Use
II.
D.
1
­
Page
4
of
21
Table
II.
D.
1.1
 
Detections
of
aldicarb,
aldicarb
sulfone,
and
aldicarb
sulfoxide
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
Aldicarb
ACFB
Cropland
0.040
0.040
0.040
0.040
0.0%
0
ALBE
Agriculture
0.340
0.078
0.016
0.016
1.2%
1
GAFL
Agriculture
0.040
0.040
0.040
0.023
0.0%
0
MISE
Cropland
0.550
0.550
0.550
0.016
0.0%
0
NVBR
Mixed
0.050
0.034
0.016
0.016
0.0%
0
REDN
Cropland
0.510
0.140
0.016
0.016
1.3%
1
SANJ
Mixed
0.460
0.072
0.040
0.040
0.7%
1
SANT
Cropland
0.480
0.350
0.016
0.016
3.4%
1
SPLT
Agriculture
0.016
0.016
0.016
0.016
0.0%
0
SPLT
Mixed
0.080
0.061
0.016
0.016
3.3%
1
SPLT
Urban
0.040
0.040
0.040
0.040
0.0%
0
TENN
Cropland
0.040
0.040
0.040
0.040
0.0%
0
TENN
Mixed
0.040
0.040
0.022
0.016
0.0%
0
WILL
Agriculture
0.040
0.040
0.040
0.040
0.0%
0
YELL
Mixed
1.200
1.031
0.550
0.550
3.7%
1
Aldicarb
Sulfone
ACFB
Cropland
0.020
0.020
0.020
0.020
0.0%
0
ALBE
Agriculture
0.016
0.016
0.016
0.016
0.0%
0
GAFL
Agriculture
0.020
0.020
0.020
0.017
0.0%
0
MISE
Cropland
0.100
0.100
0.100
0.016
0.0%
0
NVBR
Mixed
0.070
0.061
0.016
0.016
2.1%
1
REDN
Cropland
0.016
0.016
0.016
0.016
0.0%
0
SANJ
Mixed
0.090
0.020
0.020
0.020
0.0%
0
SANT
Cropland
0.016
0.016
0.016
0.016
0.0%
0
SPLT
Agriculture
0.016
0.016
0.016
0.016
0.0%
0
SPLT
Mixed
0.016
0.016
0.016
0.016
0.0%
0
SPLT
Urban
0.157
0.050
0.020
0.020
1.3%
1
TENN
Cropland
0.042
0.042
0.039
0.036
25.0%
1
TENN
Mixed
0.022
0.021
0.020
0.016
1.0%
1
WILL
Agriculture
0.020
0.020
0.020
0.020
0.0%
0
YELL
Mixed
0.260
0.218
0.100
0.100
0.0%
0
Aldicarb
Sulfoxide
ACFB
Cropland
0.920
0.021
0.021
0.021
0.6%
1
ALBE
Agriculture
0.021
0.021
0.021
0.021
0.0%
0
GAFL
Agriculture
0.290
0.021
0.021
0.021
0.8%
1
MISE
Cropland
1.910
0.222
0.021
0.021
1.2%
2
NVBR
Mixed
0.050
0.037
0.021
0.021
0.0%
0
REDN
Cropland
0.021
0.021
0.021
0.021
0.0%
0
SANJ
Mixed
0.090
0.021
0.021
0.021
0.7%
1
SANT
Cropland
1.200
0.870
0.021
0.021
3.4%
1
SPLT
Agriculture
0.980
0.472
0.021
0.021
1.9%
1
SPLT
Mixed
0.021
0.021
0.021
0.021
0.0%
0
II.
D.
1
­
Page
5
of
21
Table
II.
D.
1.1
 
Detections
of
aldicarb,
aldicarb
sulfone,
and
aldicarb
sulfoxide
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
SPLT
Urban
0.021
0.021
0.021
0.021
0.0%
0
TENN
Cropland
0.043
0.042
0.038
0.033
25.0%
1
TENN
Mixed
0.065
0.045
0.027
0.021
2.9%
3
WILL
Agriculture
0.021
0.021
0.021
0.021
2.6%
3
YELL
Mixed
0.140
0.130
0.076
0.021
0.0%
0
Table
II.
D.
1.2
 
Detections
of
carbaryl
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
Carbaryl
(
Anal.
Meth
49310)
ACAD
Cropland
0.01
0.00936
0.008
0.008
0.0%
0
ACAD
Forest
0.008
0.008
0.008
0.008
0.0%
0
ACAD
Mixed
0.0284
0.0284
0.0284
0.0182
0.0%
0
ACAD
Urban
0.008
0.008
0.008
0.008
0.0%
0
ACFB
Agriculture
0.008
0.008
0.008
0.008
0.0%
0
ACFB
Cropland
0.0284
0.0284
0.0284
0.0284
0.6%
1
ACFB
Mixed
0.07
0.06371
0.01
0.008
4.2%
5
ACFB
Not
Applicable
0.0548
0.054007
0.050835
0.0448
42.9%
6
ACFB
Reference
0.07
0.07
0.0142
0.008
0.0%
0
ACFB
Residential
0.12
0.097
0.04
0.0284
14.5%
24
ACFB
Urban
0.97
0.511
0.066
0.0332
12.7%
7
ALBE
Agriculture
0.008
0.008
0.008
0.008
0.0%
0
ALBE
Forest
­
­
­
­
­
0
ALBE
Mixed
0.0284
0.0284
0.0284
0.0284
10.5%
6
ALBE
Not
Applicable
0.0284
0.0284
0.0284
0.0284
30.8%
4
ALBE
Urban
0.1089
0.080592
0.0284
0.0284
58.1%
25
ALMN
Mixed
­
­
­
­
­
0
ALMN
Urban
0.09
0.0695
0.008
0.008
3.8%
1
CAZB
Agriculture
0.008
0.008
0.008
0.008
0.0%
0
CAZB
Mixed
0.5
0.35732
0.008
0.008
0.0%
0
CCYK
Agriculture
0.8732
0.053016
0.0284
0.0284
7.5%
13
CCYK
Mixed
0.0284
0.0284
0.0284
0.0284
5.4%
6
CCYK
Not
Applicable
­
­
­
­
­
0
CCYK
Other/
Mixed
­
­
­
­
­
0
CCYK
Reference
0.008
0.008
0.008
0.008
0.0%
0
CNBR
Agriculture
0.05
0.039416
0.0284
0.0284
2.0%
1
CNBR
Cropland
0.008
0.008
0.008
0.008
0.0%
0
CNBR
Mixed
0.0284
0.0284
0.0284
0.0284
0.0%
0
CONN
Agriculture
0.008
0.008
0.008
0.008
0.0%
0
CONN
Mixed
0.02
0.01568
0.008
0.008
2.7%
1
CONN
Reference
0.02
0.01904
0.0152
0.0104
11.1%
1
CONN
Urban
2.9
0.6264
0.061
0.0284
14.1%
14
COOK
Residential
0.11
0.1094
0.107
0.104
28.6%
2
II.
D.
1
­
Page
6
of
21
Table
II.
D.
1.2
 
Detections
of
carbaryl
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
DELR
Agriculture
­
­
­
­
­
0
DELR
Cropland
­
­
­
­
­
0
DELR
Forest
­
­
­
­
­
0
DELR
Mixed
­
­
­
­
­
0
DELR
Reference
­
­
­
­
­
0
DELR
Residential
­
­
­
­
­
0
DELR
Urban
­
­
­
­
­
0
GAFL
Agriculture
0.03
0.0284
0.0284
0.0284
0.0%
0
GAFL
Mixed
0.0284
0.0284
0.0284
0.0284
2.5%
2
GAFL
Not
Applicable
0.0284
0.0284
0.0284
0.0284
5.4%
2
GAFL
Urban
0.07
0.0583
0.0305
0.008
2.5%
1
GRSL
Agriculture
0.0284
0.0284
0.0284
0.0284
0.0%
0
GRSL
Commercial/
Indus
trial
­
­
­
­
­
0
GRSL
Mixed
0.0284
0.0284
0.0284
0.0284
0.0%
0
GRSL
Rangeland
0.0284
0.0284
0.0284
0.0284
0.0%
0
GRSL
Residential
­
­
­
­
­
0
GRSL
Urban
­
­
­
­
­
0
HDSN
Agriculture
0.0284
0.02024
0.008
0.008
0.0%
0
HDSN
Mixed
0.008
0.008
0.008
0.008
0.0%
0
HDSN
Residential
0.07
0.058768
0.0284
0.01412
3.6%
1
HDSN
Urban
0.22
0.22
0.22
0.22
100.0%
1
KANA
Agriculture
0.008
0.008
0.008
0.008
0.0%
0
KANA
Mixed
0.07
0.05388
0.008
0.008
3.7%
1
LERI
Cropland
0.0284
0.0284
0.0284
0.0284
0.0%
0
LERI
Mixed
0.0284
0.0284
0.0284
0.0284
0.0%
0
LERI
Pasture
0.008
0.008
0.008
0.008
0.0%
0
LERI
Urban
0.0284
0.0284
0.0284
0.01122
5.9%
2
LINJ
Agriculture
0.05
0.0479
0.0395
0.029
16.7%
1
LINJ
Commercial/
Indus
trial
­
­
­
­
­
0
LINJ
Forest
0.008
0.008
0.008
0.008
0.0%
0
LINJ
Mixed
0.23
0.1988
0.09
0.046
28.0%
7
LINJ
Residential
0.04
0.0392
0.036
0.032
33.3%
3
LINJ
Urban
0.008
0.008
0.008
0.008
2.5%
1
LIRB
Cropland
0.008
0.008
0.008
0.008
0.0%
0
LIRB
Mixed
0.07
0.07
0.07
0.07
0.0%
0
LSUS
Agriculture
0.34
0.085
0.008
0.008
2.3%
2
LSUS
Mixed
0.008
0.008
0.008
0.008
0.0%
0
LSUS
Reference
­
­
­
­
­
0
LSUS
Urban
0.008
0.008
0.008
0.008
0.0%
0
MISE
Cropland
0.02
0.0104
0.008
0.008
0.6%
1
MISE
Forest
­
­
­
­
­
0
MISE
Mixed
0.008
0.008
0.008
0.008
0.0%
0
MISE
Urban
0.26
0.2432
0.178
0.09
20.0%
5
II.
D.
1
­
Page
7
of
21
Table
II.
D.
1.2
 
Detections
of
carbaryl
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
MOBL
Cropland
0.0284
0.0284
0.0284
0.0284
0.0%
0
MOBL
Mixed
0.0284
0.027584
0.02432
0.02024
0.0%
0
MOBL
Pasture
­
­
­
­
­
0
MOBL
Urban
0.0284
0.0284
0.0284
0.0284
0.0%
0
NECB
Mixed
­
­
­
­
­
0
NECB
Urban
­
­
­
­
­
0
NROK
Cropland
­
­
­
­
­
0
NROK
Mixed
­
­
­
­
­
0
NROK
Urban
­
­
­
­
­
0
NVBR
Mixed
0.05
0.03068
0.008
0.008
0.0%
0
NVBR
Urban
0.0284
0.0284
0.0284
0.0284
2.3%
2
OAHU
Mixed
­
­
­
­
­
0
OAHU
Urban
­
­
­
­
­
0
OZRK
Pasture
0.008
0.008
0.008
0.008
0.0%
0
PODL
Agriculture
0.0284
0.0284
0.0284
0.0284
0.0%
0
PODL
Mixed
0.008
0.008
0.008
0.008
0.0%
0
PODL
Not
Applicable
0.1196
0.098272
0.07
0.05959
4.5%
2
PODL
Urban
0.12
0.1136
0.08876
0.05964
41.5%
27
PUGT
Agriculture
0.02
0.01628
0.008
0.008
0.0%
0
PUGT
Mixed
0.01
0.0091
0.008
0.008
0.0%
0
PUGT
Residential
­
­
­
­
­
0
PUGT
Urban
0.01
0.00908
0.008
0.008
0.0%
0
REDN
Cropland
0.008
0.008
0.008
0.008
0.0%
0
RIOG
Mixed
0.008
0.008
0.008
0.008
0.0%
0
RIOG
Not
Applicable
0.008
0.008
0.008
0.008
0.0%
0
RIOG
Urban
­
­
­
­
­
0
SACR
Cropland
0.04
0.03264
0.008
0.008
12.5%
3
SACR
Mixed
0.008
0.008
0.008
0.008
0.0%
0
SACR
Urban
0.55
0.5365
0.4405
0.316
39.3%
11
SANA
Mixed
0.008
0.008
0.008
0.008
0.0%
0
SANA
Not
Applicable
­
­
­
­
­
0
SANA
Residential
­
­
­
­
­
0
SANA
Urban
0.008
0.008
0.008
0.008
0.0%
0
SANJ
Agriculture
0.18
0.0735
0.0284
0.0284
13.9%
10
SANJ
Mixed
0.09
0.029408
0.0284
0.0284
1.4%
2
SANJ
Not
Applicable
0.0284
0.0284
0.0284
0.0284
0.0%
0
SANJ
Urban
­
­
­
­
­
0
SANT
Cropland
0.008
0.008
0.008
0.008
0.0%
0
SANT
Forest
0.008
0.008
0.008
0.008
0.0%
0
SANT
Mixed
0.008
0.008
0.008
0.008
0.0%
0
SANT
Urban
0.05
0.03656
0.008
0.008
3.0%
1
SCTX
Agriculture
0.008
0.008
0.008
0.008
0.0%
0
SCTX
Mixed
0.14
0.08588
0.008
0.008
2.4%
1
SCTX
Urban
0.2
0.1825
0.12
0.08
16.7%
6
SOFL
Agriculture
0.008
0.008
0.008
0.008
0.0%
0
II.
D.
1
­
Page
8
of
21
Table
II.
D.
1.2
 
Detections
of
carbaryl
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
SOFL
Cropland
0.02
0.02
0.008
0.008
2.3%
2
SOFL
Mixed
0.008
0.008
0.008
0.008
0.0%
0
SPLT
Agriculture
2
1.576
0.1425
0.008
7.4%
4
SPLT
Mixed
0.008
0.008
0.008
0.008
0.0%
0
SPLT
Not
Applicable
0.0284
0.0284
0.0284
0.0284
0.0%
0
SPLT
Urban
4.4
3.386
1.75
0.72
51.9%
41
TENN
Agriculture
0.011
0.00857
0.008
0.008
0.0%
0
TENN
Cropland
0.0284
0.0284
0.0284
0.0284
25.0%
1
TENN
Forest
0.011
0.01073
0.01
0.0086
0.0%
0
TENN
Mining
0.24
0.19592
0.0196
0.008
5.0%
1
TENN
Mixed
0.11
0.0284
0.0109
0.008
4.9%
5
TENN
Urban
0.008
0.008
0.008
0.008
0.0%
0
TRIN
Agriculture
0.05
0.0323
0.008
0.008
0.6%
1
TRIN
Forest
0.008
0.008
0.008
0.008
0.0%
0
TRIN
Mixed
0.008
0.008
0.008
0.008
0.0%
0
TRIN
Not
Applicable
0.0328
0.031304
0.0284
0.0284
11.4%
4
TRIN
Rangeland
0.008
0.008
0.008
0.008
0.0%
0
TRIN
Reference
0.008
0.008
0.008
0.008
0.0%
0
TRIN
Urban
0.47
0.368
0.105
0.05
22.6%
7
UCOL
Agriculture
0.008
0.008
0.008
0.008
0.0%
0
UCOL
Mixed
0.07
0.07
0.07
0.07
0.0%
0
UCOL
Other/
Mixed
0.008
0.008
0.008
0.008
0.0%
0
UIRB
Cropland
­
­
­
­
­
0
UIRB
Mixed
0.008
0.008
0.008
0.008
0.0%
0
UIRB
Urban
­
­
­
­
­
0
UMIS
Agriculture
0.07
0.07
0.07
0.0266
0.0%
0
UMIS
Mixed
0.07
0.07
0.008
0.008
0.0%
0
UMIS
Urban
0.07
0.07
0.07
0.008
0.0%
0
USNK
Agriculture
0.008
0.008
0.008
0.008
0.0%
0
WHMI
Agriculture
­
­
­
­
­
0
WHMI
Cropland
0.05
0.0284
0.0284
0.0284
1.9%
4
WHMI
Mixed
0.0284
0.0284
0.0284
0.0284
2.2%
3
WHMI
Not
Applicable
0.0653
0.059396
0.03578
0.0284
5.9%
1
WHMI
Urban
0.0415
0.038356
0.0284
0.0284
32.0%
8
WILL
Agriculture
0.0809
0.062523
0.0284
0.0284
7.0%
8
WILL
Mixed
0.07
0.0642
0.05
0.03056
6.7%
2
WILL
Urban
0.25
0.199096
0.05766
0.0284
38.6%
22
WMIC
Cropland
0.0284
0.009632
0.008
0.008
0.0%
0
WMIC
Mixed
0.0284
0.0284
0.0284
0.0284
0.0%
0
YELL
Mixed
0.008
0.008
0.008
0.008
0.0%
0
Carbaryl
(
Anal.
Meth
82680)
ACAD
Cropland
0.206
0.055964
0.041
0.041
20.2%
57
ACAD
Forest
0.236
0.2096
0.041
0.041
13.6%
11
ACAD
Mixed
0.161
0.13403
0.041
0.041
27.7%
26
ACAD
Urban
0.482
0.38813
0.2405
0.1767
64.1%
41
II.
D.
1
­
Page
9
of
21
Table
II.
D.
1.2
 
Detections
of
carbaryl
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
ACFB
Agriculture
0.01
0.00923
0.00615
0.003
8.3%
1
ACFB
Cropland
0.041
0.041
0.041
0.041
3.8%
7
ACFB
Mixed
0.174
0.098176
0.06266
0.041
48.6%
86
ACFB
Not
Applicable
0.0924
0.074481
0.041
0.041
34.0%
34
ACFB
Reference
0.05
0.0446
0.041
0.041
9.8%
6
ACFB
Residential
0.24
0.20448
0.07786
0.0451
54.2%
123
ACFB
Urban
1.9
0.8793
0.121
0.1
73.3%
44
ALBE
Agriculture
0.15
0.1102
0.0502
0.017
28.1%
56
ALBE
Forest
0.01
0.00979
0.00895
0.0079
25.0%
1
ALBE
Mixed
0.469
0.25472
0.0588
0.041
47.7%
113
ALBE
Not
Applicable
0.36
0.2589
0.041
0.041
50.9%
54
ALBE
Urban
0.197
0.139682
0.04347
0.041
85.7%
36
ALMN
Mixed
0.006
0.00513
0.003
0.003
3.3%
1
ALMN
Urban
0.613
0.61207
0.59405
0.38289
34.4%
11
CAZB
Agriculture
0.336
0.3316
0.314
0.09
14.6%
6
CAZB
Mixed
0.09
0.0784
0.0365
0.0173
13.3%
4
CCYK
Agriculture
33.5
0.34724
0.08617
0.041
36.4%
183
CCYK
Mixed
0.175
0.05794
0.041
0.041
17.9%
50
CCYK
Not
Applicable
0.041
0.041
0.041
0.041
66.7%
4
CCYK
Other/
Mixed
0.16
0.155198
0.13599
0.11198
75.0%
6
CCYK
Reference
0.0411
0.041074
0.041
0.03428
33.3%
9
CNBR
Agriculture
0.101
0.041
0.041
0.041
3.8%
8
CNBR
Cropland
0.138
0.11848
0.0404
0.0082
11.8%
2
CNBR
Mixed
0.49
0.08461
0.041
0.041
11.8%
25
CONN
Agriculture
0.012
0.01182
0.0111
0.0102
15.8%
3
CONN
Mixed
0.0971
0.082944
0.041
0.041
20.8%
26
CONN
Reference
0.041
0.041
0.041
0.041
8.0%
2
CONN
Urban
3.2
1.2033
0.1626
0.041
36.5%
70
COOK
Residential
0.332
0.31751
0.2657
0.2296
75.0%
18
DELR
Agriculture
0.452
0.28169
0.03843
0.01128
14.0%
6
DELR
Cropland
0.573
0.18152
0.041
0.041
20.6%
34
DELR
Forest
0.041
0.041
0.041
0.041
2.1%
1
DELR
Mixed
0.617
0.061848
0.041
0.041
36.1%
66
DELR
Reference
0.041
0.041
0.041
0.041
22.2%
4
DELR
Residential
2.41
0.528
0.148
0.12
66.3%
67
DELR
Urban
0.154
0.119776
0.04021
0.02784
34.9%
22
GAFL
Agriculture
0.083
0.041
0.041
0.041
4.6%
11
GAFL
Mixed
0.154
0.06258
0.041
0.041
26.2%
49
GAFL
Not
Applicable
0.0842
0.066056
0.041
0.041
18.6%
8
GAFL
Urban
0.441
0.32922
0.1067
0.04018
52.9%
37
GRSL
Agriculture
0.174
0.13011
0.041
0.041
29.4%
10
GRSL
Commercial/
Indus
trial
0.128
0.128
0.128
0.128
100.0%
1
GRSL
Mixed
0.0928
0.086912
0.06608
0.041
50.8%
33
GRSL
Rangeland
0.041
0.041
0.041
0.041
5.6%
1
II.
D.
1
­
Page
10
of
21
Table
II.
D.
1.2
 
Detections
of
carbaryl
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
GRSL
Residential
0.411
0.31552
0.1308
0.07672
56.8%
71
GRSL
Urban
0.0315
0.031284
0.03042
0.02934
75.0%
3
HDSN
Agriculture
0.041
0.041
0.041
0.041
2.5%
5
HDSN
Mixed
0.0641
0.041
0.041
0.041
11.1%
17
HDSN
Residential
0.86
0.4424
0.194
0.118
49.3%
36
HDSN
Urban
1.6
1.6
1.6
1.6
100.0%
1
KANA
Agriculture
0.0061
0.005108
0.003
0.003
3.0%
1
KANA
Mixed
0.092
0.072008
0.01748
0.01056
31.0%
9
LERI
Cropland
0.432
0.114254
0.041
0.041
8.6%
21
LERI
Mixed
0.143
0.11234
0.05306
0.041
24.4%
30
LERI
Pasture
0.0311
0.021665
0.01135
0.00633
11.5%
6
LERI
Urban
0.222
0.17386
0.08472
0.041
44.1%
26
LINJ
Agriculture
0.3
0.274872
0.17436
0.08192
53.8%
7
LINJ
Commercial/
Indus
trial
0.189
0.185253
0.170265
0.15153
75.0%
3
LINJ
Forest
0.0441
0.038146
0.02114
0.01746
33.3%
9
LINJ
Mixed
0.353
0.2498
0.1544
0.1104
58.6%
51
LINJ
Residential
0.13
0.13
0.1155
0.0973
41.9%
13
LINJ
Urban
0.043
0.04012
0.03294
0.01414
28.6%
14
LIRB
Cropland
0.124
0.042102
0.041
0.041
6.6%
12
LIRB
Mixed
0.041
0.041
0.041
0.041
5.3%
5
LSUS
Agriculture
0.647
0.15816
0.01792
0.00888
18.1%
44
LSUS
Mixed
0.057
0.04728
0.0277
0.0057
12.2%
10
LSUS
Reference
0.003
0.003
0.003
0.003
3.8%
1
LSUS
Urban
0.15
0.124
0.0572
0.031
29.4%
32
MISE
Cropland
0.0944
0.041
0.041
0.041
4.4%
10
MISE
Forest
0.041
0.041
0.041
0.041
16.7%
1
MISE
Mixed
0.041
0.041
0.041
0.041
7.1%
8
MISE
Urban
0.359
0.33409
0.23325
0.1695
77.1%
37
MOBL
Cropland
0.041
0.041
0.041
0.041
10.6%
7
MOBL
Mixed
0.041
0.041
0.041
0.041
16.1%
19
MOBL
Pasture
0.0041
0.004078
0.00399
0.00388
33.3%
1
MOBL
Urban
0.422
0.30602
0.073755
0.041
28.6%
48
NECB
Mixed
0.131
0.114017
0.050585
0.041
48.1%
25
NECB
Urban
1.1
0.48234
0.1687
0.0641
43.3%
55
NROK
Cropland
0.0065
0.00629
0.00545
0.0044
14.3%
1
NROK
Mixed
0.006
0.005675
0.004375
0.00335
7.1%
1
NROK
Urban
0.006
0.00576
0.0048
0.0036
9.1%
1
NVBR
Mixed
0.173
0.102895
0.041
0.041
27.9%
38
NVBR
Urban
0.215
0.11368
0.06544
0.0452
30.3%
47
OAHU
Mixed
0.294
0.2697
0.1788
0.0683
25.0%
7
OAHU
Urban
0.37
0.33463
0.23865
0.11277
32.1%
9
OZRK
Pasture
0.079
0.04241
0.041
0.041
2.6%
4
PODL
Agriculture
0.186
0.08662
0.041
0.041
13.3%
42
PODL
Mixed
0.061
0.041
0.041
0.041
21.1%
47
II.
D.
1
­
Page
11
of
21
Table
II.
D.
1.2
 
Detections
of
carbaryl
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
PODL
Not
Applicable
0.218
0.072272
0.041
0.041
9.7%
9
PODL
Urban
2
1.3516
0.38235
0.234
80.4%
135
PUGT
Agriculture
0.133
0.114648
0.04696
0.0093
9.4%
3
PUGT
Mixed
0.23
0.046256
0.041
0.041
7.0%
7
PUGT
Residential
0.0218
0.021189
0.018745
0.01413
21.4%
3
PUGT
Urban
0.483
0.23484
0.0571
0.041
26.3%
25
REDN
Cropland
0.008
0.004846
0.003
0.003
1.7%
2
RIOG
Mixed
0.082
0.0448
0.041
0.041
5.6%
11
RIOG
Not
Applicable
0.044
0.04313
0.03965
0.0353
75.0%
3
RIOG
Urban
0.036
0.0357
0.0345
0.033
50.0%
2
SACR
Cropland
0.657
0.39204
0.0989
0.0809
38.8%
19
SACR
Mixed
0.0725
0.061622
0.041
0.041
24.2%
24
SACR
Urban
1.55
1.2024
0.41225
0.2915
96.4%
54
SANA
Mixed
0.145
0.095185
0.063925
0.04352
53.7%
44
SANA
Not
Applicable
0.0261
0.025638
0.02379
0.02148
33.3%
1
SANA
Residential
0.008
0.008
0.008
0.008
100.0%
1
SANA
Urban
0.307
0.150616
0.041
0.041
16.4%
12
SANJ
Agriculture
0.7
0.33832
0.0884
0.041
45.3%
216
SANJ
Mixed
5.2
0.18284
0.0475
0.041
37.3%
326
SANJ
Not
Applicable
0.041
0.041
0.041
0.041
21.9%
7
SANJ
Urban
0.411
0.38097
0.30505
0.2084
97.1%
33
SANT
Cropland
0.041
0.041
0.041
0.041
9.0%
10
SANT
Forest
0.0064
0.005108
0.003
0.003
2.6%
1
SANT
Mixed
0.0593
0.043928
0.041
0.041
7.1%
6
SANT
Urban
0.16
0.14173
0.04217
0.041
50.0%
44
SCTX
Agriculture
0.0903
0.064395
0.008875
0.00398
11.8%
4
SCTX
Mixed
0.172
0.073811
0.041
0.041
31.5%
29
SCTX
Urban
0.168
0.1599
0.1088
0.06848
47.3%
26
SOFL
Agriculture
0.0071
0.006854
0.00587
0.00464
14.3%
1
SOFL
Cropland
0.414
0.04102
0.041
0.041
7.0%
14
SOFL
Mixed
0.273
0.21036
0.041
0.041
46.4%
13
SPLT
Agriculture
1.5
0.377
0.07125
0.041
16.5%
17
SPLT
Mixed
0.143
0.13802
0.092915
0.06116
56.7%
76
SPLT
Not
Applicable
16.5
0.9832
0.09117
0.05094
32.1%
36
SPLT
Urban
5.5
4.976
1.72
0.69
89.2%
140
TENN
Agriculture
0.0456
0.041
0.041
0.041
4.2%
7
TENN
Cropland
0.101
0.059892
0.041
0.041
9.2%
8
TENN
Forest
0.041
0.041
0.041
0.0276
4.9%
4
TENN
Mining
0.72
0.53208
0.06312
0.01064
21.6%
8
TENN
Mixed
0.921
0.084364
0.041
0.041
15.7%
48
TENN
Urban
0.007
0.00676
0.0058
0.0046
14.3%
1
TRIN
Agriculture
0.205
0.06115
0.041
0.041
7.5%
15
TRIN
Forest
0.009
0.00894
0.0087
0.0084
50.0%
1
TRIN
Mixed
0.183
0.13196
0.098
0.06288
57.3%
51
TRIN
Not
Applicable
0.167
0.16294
0.142
0.094
57.6%
34
II.
D.
1
­
Page
12
of
21
Table
II.
D.
1.2
 
Detections
of
carbaryl
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
TRIN
Rangeland
0.009
0.00834
0.0057
0.003
8.3%
1
TRIN
Reference
5.18
2.8864
0.041
0.041
8.3%
4
TRIN
Urban
0.4
0.358
0.23
0.19
41.9%
13
UCOL
Agriculture
0.0227
0.015484
0.00552
0.00324
11.1%
5
UCOL
Mixed
0.041
0.041
0.041
0.041
11.8%
6
UCOL
Other/
Mixed
0.041
0.041
0.041
0.041
7.7%
1
UIRB
Cropland
0.0708
0.054112
0.041
0.041
14.0%
8
UIRB
Mixed
0.0992
0.065536
0.041975
0.041
36.6%
49
UIRB
Urban
0.14
0.1342
0.0963
0.07612
64.4%
38
UMIS
Agriculture
0.041
0.041
0.041
0.041
1.2%
1
UMIS
Mixed
0.0827
0.041
0.041
0.041
4.7%
7
UMIS
Urban
0.175
0.108374
0.041
0.041
23.6%
30
USNK
Agriculture
0.19
0.041109
0.041
0.041
4.0%
8
WHMI
Agriculture
0.19
0.148967
0.03184
0.01858
44.7%
17
WHMI
Cropland
0.46
0.0814
0.041
0.041
13.6%
68
WHMI
Mixed
0.065
0.041
0.041
0.041
12.8%
49
WHMI
Not
Applicable
0.041
0.041
0.041
0.041
21.4%
12
WHMI
Urban
0.672
0.16322
0.074925
0.04939
46.9%
60
WILL
Agriculture
2
0.48862
0.05632
0.041
39.6%
72
WILL
Mixed
0.132
0.041
0.041
0.041
24.6%
32
WILL
Urban
0.842
0.44676
0.238
0.1082
66.3%
55
WMIC
Cropland
0.045
0.041
0.041
0.041
1.4%
2
WMIC
Mixed
0.045
0.041
0.041
0.041
18.2%
22
YELL
Mixed
0.041
0.041
0.041
0.041
1.9%
3
Table
II.
D.
1.3
 
Detections
of
carbofuran
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
Carbofuran
(
Anal.
Meth.
49309)
ACAD
Cropland
1.35
0.9564
0.12
0.12
3.0%
1
ACAD
Mixed
0.12
0.12
0.12
0.12
6.3%
1
ACFB
Residential
0.29
0.1795
0.12
0.028
0.0%
0
ACFB
Urban
0.028
0.028
0.028
0.028
0.0%
0
ALBE
Agriculture
0.028
0.028
0.028
0.028
0.0%
0
ALBE
Mixed
0.028
0.028
0.028
0.028
0.0%
0
ALBE
Not
Applicable
0.0065
0.006476
0.00638
0.00616
15.4%
2
CAZB
Agriculture
0.12
0.12
0.12
0.12
0.0%
0
CAZB
Mixed
0.5
0.3898
0.12
0.12
0.0%
0
CCYK
Agriculture
0.13
0.12
0.12
0.12
1.2%
2
CCYK
Mixed
0.12
0.12
0.12
0.12
0.0%
0
CNBR
Agriculture
0.05
0.03922
0.028
0.028
2.0%
1
CNBR
Cropland
0.49
0.43456
0.2128
0.028
7.7%
1
CNBR
Mixed
0.3066
0.22302
0.028
0.028
3.2%
1
CONN
Agriculture
0.08
0.07064
0.0332
0.028
5.3%
1
II.
D.
1
­
Page
13
of
21
Table
II.
D.
1.3
 
Detections
of
carbofuran
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
CONN
Mixed
0.028
0.028
0.028
0.028
0.0%
0
DELR
Agriculture
­
­
­
­
­
0
DELR
Cropland
­
­
­
­
­
0
DELR
Forest
­
­
­
­
­
0
DELR
Mixed
­
­
­
­
­
0
DELR
Residential
­
­
­
­
­
0
EIWA
Cropland
0.12
0.12
0.12
0.12
0.0%
0
EIWA
Mixed
­
­
­
­
­
0
EIWA
Not
Applicable
0.028
0.028
0.028
0.028
0.0%
0
GAFL
Agriculture
0.028
0.028
0.028
0.028
0.0%
0
GAFL
Mixed
0.028
0.028
0.028
0.028
2.5%
2
GRSL
Mixed
0.0056
0.0056
0.0056
0.0056
0.0%
0
GRSL
Residential
­
­
­
­
­
0
HDSN
Agriculture
0.028
0.028
0.028
0.028
0.0%
0
HDSN
Commercial/
Indus
trial
0.028
0.028
0.028
0.028
0.0%
0
HDSN
Mixed
0.028
0.028
0.028
0.028
0.0%
0
LERI
Cropland
0.12
0.12
0.12
0.12
1.4%
1
LERI
Mixed
0.12
0.12
0.12
0.028
0.0%
0
LINJ
Agriculture
0.12
0.1154
0.097
0.074
0.0%
0
LINJ
Forest
0.12
0.11908
0.1154
0.1108
0.0%
0
LINJ
Mixed
0.12
0.12
0.1016
0.028
0.0%
0
LINJ
Urban
0.12
0.08412
0.028
0.028
2.5%
1
LIRB
Cropland
2.02
0.634
0.12
0.12
2.8%
4
LIRB
Mixed
1.32
1.0578
0.7845
0.458
1.4%
1
LSUS
Agriculture
0.27
0.0643
0.028
0.028
1.2%
1
LSUS
Mixed
0.028
0.028
0.028
0.028
0.0%
0
LSUS
Urban
0.028
0.028
0.028
0.028
0.0%
0
MISE
Cropland
2.82
0.7882
0.3455
0.12
8.1%
13
MISE
Mixed
0.33
0.2313
0.12
0.12
2.1%
1
MISE
Urban
0.028
0.028
0.028
0.028
0.0%
0
MOBL
Urban
0.84
0.7536
0.408
0.12
0.0%
0
NVBR
Mixed
0.05
0.03988
0.028
0.028
0.0%
0
NVBR
Urban
0.028
0.028
0.028
0.028
0.0%
0
OZRK
Pasture
0.028
0.028
0.028
0.028
0.0%
0
PODL
Agriculture
0.056
0.0322
0.028
0.028
11.6%
10
PODL
Mixed
0.028
0.028
0.028
0.028
0.0%
0
PODL
Not
Applicable
0.29
0.29
0.29
0.20933
25.0%
11
PODL
Urban
0.1
0.05392
0.028
0.028
1.5%
1
PUGT
Agriculture
0.11
0.11
0.11
0.11
0.0%
0
REDN
Agriculture
0.028
0.028
0.028
0.028
0.0%
0
REDN
Cropland
0.4
0.3475
0.028
0.028
2.6%
2
REDN
Mixed
0.059
0.05726
0.028
0.028
0.0%
0
REDN
Not
Applicable
0.028
0.028
0.028
0.028
0.0%
0
RIOG
Agriculture
0.028
0.028
0.028
0.028
0.0%
0
II.
D.
1
­
Page
14
of
21
Table
II.
D.
1.3
 
Detections
of
carbofuran
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
RIOG
Mixed
0.28
0.115
0.028
0.028
3.0%
2
SACR
Cropland
0.2
0.2
0.1925
0.141
20.8%
5
SACR
Mixed
0.12
0.12
0.12
0.12
0.0%
0
SACR
Urban
0.12
0.12
0.12
0.12
0.0%
0
SANA
Mixed
0.34
0.334
0.31
0.28
0.0%
0
SANJ
Agriculture
0.79
0.24898
0.028
0.028
6.9%
5
SANJ
Mixed
0.09
0.028504
0.028
0.028
4.3%
6
SANJ
Urban
­
­
­
­
­
0
SANT
Cropland
0.12
0.09424
0.028
0.028
3.4%
1
SANT
Mixed
0.028
0.028
0.028
0.028
0.0%
0
SCTX
Mixed
0.12
0.12
0.12
0.12
0.0%
0
SOFL
Cropland
0.12
0.12
0.12
0.12
0.0%
0
SPLT
Agriculture
1.8
1.2859
0.4825
0.1624
11.1%
6
SPLT
Mixed
0.028
0.028
0.028
0.028
0.0%
0
SPLT
Urban
0.028
0.028
0.028
0.028
0.0%
0
TENN
Agriculture
0.038
0.03557
0.028
0.028
0.0%
0
TENN
Cropland
0.0056
0.0056
0.0056
0.0056
0.0%
0
TENN
Mining
0.028
0.028
0.028
0.028
0.0%
0
TENN
Mixed
0.06
0.03796
0.0343
0.028
1.0%
1
TENN
Urban
0.028
0.028
0.028
0.028
0.0%
0
TRIN
Agriculture
1.8
0.964
0.0291
0.028
3.8%
6
TRIN
Not
Applicable
0.056
0.056
0.056
0.0448
0.0%
0
TRIN
Rangeland
0.028
0.028
0.028
0.028
0.0%
0
TRIN
Reference
0.028
0.028
0.028
0.028
0.0%
0
TRIN
Urban
0.056
0.056
0.056
0.056
0.0%
0
UCOL
Agriculture
1.81
1.724
0.6125
0.54
31.8%
14
UCOL
Mixed
0.29
0.29
0.29
0.29
0.0%
0
UIRB
Cropland
­
­
­
­
­
0
UIRB
Mixed
0.12
0.12
0.12
0.12
0.0%
0
UMIS
Agriculture
3.4
3.1151
1.9755
0.55
0.0%
0
UMIS
Mixed
0.29
0.29
0.1225
0.12
0.0%
0
UMIS
Urban
0.29
0.29
0.29
0.12
0.0%
0
USNK
Agriculture
0.028
0.028
0.028
0.028
0.0%
0
WHMI
Agriculture
­
­
­
­
­
0
WHMI
Cropland
0.52
0.0551
0.028
0.028
2.3%
5
WHMI
Forest
­
­
­
­
­
0
WHMI
Mixed
0.056
0.04592
0.028
0.028
0.7%
1
WHMI
Not
Applicable
0.0116
0.01064
0.0068
0.0056
5.9%
1
WILL
Agriculture
13.2711
9.043899
1.64
0.531
36.0%
41
WILL
Mixed
0.05
0.05
0.05
0.0302
10.0%
3
WILL
Urban
0.028
0.028
0.028
0.028
0.0%
0
WMIC
Agriculture
0.028
0.028
0.028
0.028
0.0%
0
WMIC
Cropland
0.028
0.028
0.028
0.028
0.0%
0
WMIC
Mixed
0.028
0.028
0.028
0.028
0.0%
0
YELL
Mixed
0.12
0.12
0.12
0.12
0.0%
0
II.
D.
1
­
Page
15
of
21
Table
II.
D.
1.3
 
Detections
of
carbofuran
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
Carbofuran
(
Anal.
Meth.
82674)
ACAD
Cropland
1.84
0.69522
0.1083
0.04008
20.1%
57
ACAD
Mixed
0.744
0.70773
0.0757
0.03894
23.4%
22
ACFB
Residential
0.02
0.02
0.02
0.02
0.5%
1
ACFB
Urban
0.008
0.00525
0.003
0.003
1.8%
1
ALBE
Agriculture
0.14
0.04842
0.018
0.003
8.5%
17
ALBE
Mixed
0.48
0.086472
0.02
0.02
4.2%
10
ALBE
Not
Applicable
­
­
­
­
­
0
CAZB
Agriculture
0.57
0.358
0.036
0.03
2.4%
1
CAZB
Mixed
0.087
0.07917
0.051
0.0355
3.3%
1
CCYK
Agriculture
0.14
0.05315
0.02
0.02
4.8%
22
CCYK
Mixed
0.123
0.04147
0.02
0.02
2.5%
7
CNBR
Agriculture
0.59
0.4034
0.03631
0.02
15.1%
30
CNBR
Cropland
0.326
0.30984
0.2452
0.2178
35.3%
6
CNBR
Mixed
0.35
0.25174
0.05784
0.02672
20.3%
43
CONN
Agriculture
0.05
0.04154
0.0077
0.003
5.3%
1
CONN
Mixed
0.03
0.02
0.02
0.02
0.8%
1
DELR
Agriculture
0.05
0.0374
0.01988
0.01028
4.7%
2
DELR
Cropland
0.1
0.0418
0.02008
0.02
2.4%
4
DELR
Forest
0.0452
0.035908
0.02
0.02
2.1%
1
DELR
Mixed
0.1
0.0418
0.0245
0.02
0.5%
1
DELR
Residential
0.109
0.02
0.02
0.02
1.0%
1
EIWA
Cropland
1.5
0.49112
0.08788
0.02
11.8%
27
EIWA
Mixed
0.2
0.10953
0.06395
0.02
10.7%
9
EIWA
Not
Applicable
0.02
0.01779
0.00895
0.003
7.1%
1
GAFL
Agriculture
0.03
0.02
0.02
0.02
2.1%
5
GAFL
Mixed
0.287
0.025754
0.02
0.02
2.7%
5
GRSL
Mixed
0.05
0.041552
0.02
0.02
1.5%
1
GRSL
Residential
0.04
0.03
0.02
0.02
1.6%
2
HDSN
Agriculture
0.1
0.0203
0.02
0.02
0.5%
1
HDSN
Commercial/
Indus
trial
0.021
0.021
0.021
0.021
100.0%
1
HDSN
Mixed
0.03
0.0248
0.02
0.02
0.7%
1
LERI
Cropland
0.188
0.03368
0.02
0.02
3.3%
8
LERI
Mixed
0.328
0.25324
0.03503
0.02
5.7%
7
LINJ
Agriculture
0.132
0.11754
0.0597
0.0107
30.8%
4
LINJ
Forest
0.0185
0.015432
0.00559
0.003
7.4%
2
LINJ
Mixed
0.0635
0.04329
0.02
0.02
10.3%
9
LINJ
Urban
0.0546
0.049848
0.02378
0.01644
24.5%
12
LIRB
Cropland
1.01
0.56058
0.040595
0.02
13.2%
24
LIRB
Mixed
0.0872
0.073758
0.02846
0.02
7.4%
7
LSUS
Agriculture
0.476
0.101004
0.0359
0.01032
13.2%
32
LSUS
Mixed
0.341
0.26729
0.019
0.0094
13.4%
11
LSUS
Urban
0.062
0.01772
0.003
0.003
0.9%
1
MISE
Cropland
2.63
1.114
0.3668
0.1278
14.7%
33
II.
D.
1
­
Page
16
of
21
Table
II.
D.
1.3
 
Detections
of
carbofuran
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
MISE
Mixed
0.549
0.24676
0.08614
0.0516
12.4%
14
MISE
Urban
0.02
0.02
0.02
0.02
2.1%
1
MOBL
Urban
0.05
0.0283
0.02
0.02
1.8%
3
NVBR
Mixed
0.051
0.03195
0.02
0.02
2.9%
4
NVBR
Urban
0.026
0.02
0.02
0.02
0.6%
1
OZRK
Pasture
0.25
0.02
0.02
0.02
2.6%
4
PODL
Agriculture
0.17
0.07118
0.02
0.02
9.8%
31
PODL
Mixed
0.16
0.1178
0.02
0.02
5.4%
12
PODL
Not
Applicable
0.04
0.031638
0.02
0.02
18.7%
14
PODL
Urban
0.46
0.02732
0.02
0.02
1.8%
3
PUGT
Agriculture
0.005
0.00438
0.003
0.003
3.1%
1
REDN
Agriculture
0.11
0.06905
0.00825
0.003
6.5%
3
REDN
Cropland
0.43
0.3976
0.0867
0.0164
12.2%
14
REDN
Mixed
0.1
0.08344
0.0248
0.0148
11.8%
11
REDN
Not
Applicable
0.15
0.138
0.092
0.04
19.4%
6
RIOG
Agriculture
0.15
0.11374
0.0486
0.04
21.1%
8
RIOG
Mixed
0.75
0.1359
0.02
0.02
9.2%
18
SACR
Cropland
0.412
0.30304
0.1302
0.10056
55.1%
27
SACR
Mixed
0.0744
0.066658
0.0286
0.02
12.1%
12
SACR
Urban
0.0565
0.053145
0.0225
0.02
3.6%
2
SANA
Mixed
0.02
0.02
0.02
0.02
2.4%
2
SANJ
Agriculture
0.982
0.21375
0.03795
0.02
14.7%
70
SANJ
Mixed
0.156
0.03552
0.02
0.02
5.3%
46
SANJ
Urban
0.06
0.06
0.054
0.0264
3.0%
1
SANT
Cropland
0.31
0.0335
0.02
0.02
4.5%
5
SANT
Mixed
0.035
0.0224
0.02
0.02
2.4%
2
SCTX
Mixed
0.085
0.046234
0.0228
0.02
5.4%
5
SOFL
Cropland
0.328
0.067086
0.02
0.02
4.5%
9
SPLT
Agriculture
1.2
0.9604
0.347
0.228
25.2%
26
SPLT
Mixed
0.14
0.1068
0.05376
0.0344
17.3%
23
SPLT
Urban
0.059
0.02484
0.02
0.02
1.9%
3
TENN
Agriculture
0.0895
0.02
0.02
0.02
2.4%
4
TENN
Cropland
0.02
0.02
0.02
0.02
3.4%
3
TENN
Mining
0.011
0.010496
0.00432
0.003
2.7%
1
TENN
Mixed
0.22
0.05056
0.02
0.02
5.9%
18
TENN
Urban
0.0054
0.005256
0.00468
0.00396
14.3%
1
TRIN
Agriculture
7
2.638
0.1919
0.0206
14.5%
29
TRIN
Not
Applicable
0.02
0.02
0.02
0.02
2.3%
1
TRIN
Rangeland
0.031
0.02792
0.0156
0.003
8.3%
1
TRIN
Reference
5.82
3.094
0.02
0.02
2.1%
1
TRIN
Urban
0.24
0.1689
0.003
0.003
6.5%
2
UCOL
Agriculture
1.69
1.37848
0.9192
0.5352
44.4%
20
UCOL
Mixed
0.163
0.1091
0.03065
0.0254
27.5%
14
UIRB
Cropland
0.332
0.30288
0.09092
0.02
10.5%
6
UIRB
Mixed
0.2
0.139867
0.02
0.02
6.0%
8
II.
D.
1
­
Page
17
of
21
Table
II.
D.
1.3
 
Detections
of
carbofuran
by
two
analytical
methods
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
UMIS
Agriculture
0.939
0.18384
0.02
0.02
3.5%
3
UMIS
Mixed
0.2
0.1816
0.02
0.02
2.7%
4
UMIS
Urban
0.05
0.0275
0.02
0.02
1.6%
2
USNK
Agriculture
0.0703
0.05015
0.02
0.02
1.0%
2
WHMI
Agriculture
0.0829
0.054817
0.0036
0.003
2.6%
1
WHMI
Cropland
0.95
0.12815
0.02
0.02
6.3%
30
WHMI
Forest
0.019
0.019
0.019
0.019
100.0%
1
WHMI
Mixed
0.157
0.06
0.02
0.02
7.1%
27
WHMI
Not
Applicable
0.0464
0.044024
0.03452
0.02264
10.0%
1
WILL
Agriculture
32.2
11.783
3.4125
0.7767
68.1%
124
WILL
Mixed
0.181
0.074189
0.02
0.02
13.8%
18
WILL
Urban
0.038
0.031112
0.02
0.02
6.0%
5
WMIC
Agriculture
0.045
0.04164
0.0282
0.0114
11.1%
1
WMIC
Cropland
0.097
0.073224
0.02
0.02
4.1%
6
WMIC
Mixed
0.119
0.02
0.02
0.02
3.3%
4
YELL
Mixed
0.0335
0.02735
0.02
0.02
1.9%
3
Table
II.
D.
1.4
 
Detections
of
Methiocarb
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
TRIN
Mixed
0.23
0.179
0.026
0.026
3.8%
1
WILL
Agriculture
0.1
0.02948
0.026
0.026
2.6%
3
Table
II.
D.
1.5
 
Detections
of
Methomyl
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
ALBE
Mixed
0.021
0.019
0.017
0.017
5.3%
3
CAZB
Agriculture
0.270
0.169
0.017
0.017
2.4%
1
GAFL
Mixed
0.017
0.017
0.017
0.017
1.3%
1
LSUS
Agriculture
0.190
0.043
0.017
0.017
1.2%
1
MISE
Cropland
0.650
0.278
0.017
0.017
3.7%
6
MISE
Mixed
0.090
0.057
0.017
0.017
2.2%
1
MOBL
Cropland
0.017
0.017
0.017
0.017
11.1%
1
NVBR
Urban
0.140
0.034
0.017
0.017
1.1%
1
SANJ
Agriculture
0.670
0.429
0.214
0.043
19.4%
14
SANJ
Mixed
0.090
0.052
0.017
0.017
2.9%
4
SOFL
Cropland
0.470
0.436
0.168
0.017
8.0%
7
SPLT
Urban
0.017
0.017
0.017
0.017
1.3%
1
TRIN
Agriculture
1.000
0.227
0.017
0.017
1.9%
3
WILL
Agriculture
0.020
0.017
0.017
0.017
1.8%
2
II.
D.
1
­
Page
18
of
21
Table
II.
D.
1.6
 
Detections
of
Oxamyll
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
PUGT
Agriculture
0.16
0.1569
0.1445
0.129
34.4%
11
SANJ
Agriculture
0.0254
0.020146
0.018
0.018
1.4%
1
WILL
Agriculture
0.07
0.01974
0.018
0.018
0.9%
1
Table
II.
D.
1.7
 
Detections
of
Propoxur
in
USGS
NAWQA
surface
water
monitoring
sites
summarized
by
study
unit
(
Suid)
and
land
use.
Suid
Land
Use
Max
Detect
99th
95th
90th
Pct
Detect
No.
Detect
ACFB
Residential
0.290
0.143
0.035
0.035
0.6%
1
ALBE
Mixed
0.035
0.035
0.035
0.035
14.0%
8
CAZB
Agriculture
0.190
0.128
0.035
0.035
2.4%
1
CCYK
Mixed
0.035
0.035
0.035
0.035
0.9%
1
GAFL
Mixed
0.035
0.035
0.035
0.035
18.8%
12
GAFL
Not
Applicable
0.035
0.025
0.008
0.008
5.4%
2
LERI
Urban
0.035
0.035
0.035
0.035
2.9%
1
NVBR
Urban
0.035
0.035
0.035
0.035
4.7%
4
PODL
Urban
0.035
0.035
0.035
0.035
10.0%
6
REDN
Agriculture
0.035
0.035
0.035
0.035
4.3%
2
SANJ
Agriculture
0.070
0.047
0.035
0.035
13.9%
10
SANJ
Mixed
0.090
0.046
0.035
0.035
16.7%
23
SPLT
Agriculture
0.110
0.071
0.035
0.035
1.9%
1
SPLT
Urban
0.035
0.035
0.035
0.035
2.5%
2
TRIN
Not
Applicable
0.035
0.035
0.035
0.035
8.6%
3
b.
Ground
Water
Monitoring
Summary
The
USGS
National
Water­
Quality
Assessment
(
NAWQA)
program
began
in
1990
as
an
effort
to
catalog
the
quality
of
water
resources
in
the
United
States
by
collecting
surface
and
groundwater
data
in
selected
watersheds.
Chemical,
biological,
and
physical
parameters
are
measured
at
59
study
units
across
the
United
States.
In
the
period
between
May,
1993
and
September,
2003,
approximately
6700
groundwater
samples
were
tested
for
an
assortment
of
carbamate
pesticides
and
metabolites.
Most
sites
were
sampled
only
once,
although
repeat
samples
were
taken
at
some
locations.
Carbofuran
and
carbaryl
were
tested
for
in
6500
of
these
samples
while
9
other
compounds
including
aldicarb
and
methomyl
were
tested
for
in
approximately
4200
samples
each.

This
represents
a
preliminary
summary
of
the
USGS
ground
water
monitoring
data
from
NAWQA.

Aldicarb
Aldicarb
and
its
metabolites
aldicarb
sulfoxide
and
aldicarb
sulfone
were
tested
for
in
4223
groundwater
samples,
resulting
in
1
detection
of
aldicarb
(
0.01
ppb),
22
II.
D.
1
­
Page
19
of
21
detections
of
aldicarb
sulfoxide
(
0.004
 
1.8
ppb),
and
15
detections
of
aldicarb
sulfone
(
0.009
 
0.141
ppb).
Several
additional
samples
were
tested
for
individual
compounds
with
no
detections.
The
large
majority
of
the
detections
(
87%)
were
found
in
the
Southeast,
primarily
in
Georgia
and
Alabama,
although
only
27%
of
the
total
sampling
was
carried
out
in
this
region.
The
two
highest
aldicarb
sulfoxide
concentrations,
1.8
and
0.26
ppb,
were
measured
outside
of
the
Southeast,
in
Connecticut
and
Idaho,
respectively.
The
only
detection
of
aldicarb
was
found
in
Indiana.
29
detections
(
76%)
occurred
in
the
years
2000
to
2003,
despite
the
fact
that
only
18%
of
the
sampling
was
conducted
in
these
years.
In
part,
this
can
be
attributed
to
improved
detection
limits
for
aldicarb
sulfoxide
in
that
time
period,
but
this
only
applies
to
about
a
third
of
these
more
recent
detections.
See
the
tables
below
for
further
details
on
these
results.

Table
II.
D.
1.8.
Summary
of
sampling
and
detections
for
aldicarb
and
its
metabolites
from
USGS
NAWQA
ground
water
monitoring
sites
Aldicarb
Aldicarb
Sulfoxide
Aldicarb
Sulfone
Total
Detections:
1
22
15
Total
Samples:
4263
4226
4223
Range
(
ppb):
0.01
(
E)
0.004
(
E)
­
1.8
0.009
(
E)
­
0.141
Detection
Limit
(
ppb):
0.04
­
0.21
0.016
­
0.2
0.0082
­
0.05
Table
II.
D.
1.9.
Detections
for
aldicarb
and
its
metabolites
by
region
and
time
from
USGS
NAWQA
ground
water
monitoring
sites
1993­
1996
1997­
1999
2000­
2003
Grand
Total
Region
Det.
Ttl
No.
Det.
Ttl
No.
Det.
Ttl
No.
Det.
Ttl
No.

Middle
Atlantic
­­
358
1
62
­­
70
1
490
Midwest
1
409
­­
253
­­
168
1
830
New
England
2
130
­­
­­
­­
31
2
161
Pacific
376
85
142
603
Rocky
Mountain
1
403
­­
97
­­
83
1
583
Southeast
4
562
­­
354
29
241
33
1157
Southwest
253
98
48
399
Grand
Total
8
2491
1
949
29
783
38
4223
Carbofuran
6558
groundwater
samples
were
tested
for
carbofuran,
with
58
positive
detections
ranging
from
0.0018
to
1.3
ppb,
with
an
average
of
0.01
ppb
and
a
99th
percentile
value
of
0.95
ppb.
The
highest
concentrations
of
carbofuran
were
found
in
agricultural
areas
in
Connecticut
in
1993
(
1.3
ppb)
and
in
California
in
1997
(
0.686
ppb).
The
largest
number
of
detections
were
found
in
the
middle
Atlantic
region,
which
had
31%
of
the
total
detections,
although
only
11%
of
the
samples
were
collected
in
that
region.

4259
samples,
all
but
113
from
the
same
set
as
carbofuran,
were
tested
for
the
II.
D.
1
­
Page
20
of
21
metabolite
2­
hydroxycarbofuran.
Detectable
2­
hydroxycarbofuran
was
found
in
only
one
sample,
from
a
mixed
use
area
in
Iowa
in
1998,
which
measured
0.07
ppb.
Sampling
for
the
metabolite
3­
ketocarbofuran
did
not
begin
until
the
year
2000,
and
so
only
763
samples
were
tested
for
this
compound.
There
were
no
detections.
For
each
of
the
compounds,
approximately
half
of
the
samples
were
collected
in
the
Southeast
and
the
Midwest.
See
the
tables
below
for
further
details
on
these
results.

Table
II.
D.
1.10.
Summary
of
sampling
and
detections
for
carbofuran
and
its
metabolites
from
USGS
NAWQA
ground
water
monitoring
sites
Carbofuran
2­
hydroxy
carbo
3­
keto
carbo
Total
Detections:
58
1
0
Total
Samples:
6558
4259
763
Range
(
ppb):
0.0018
(
E)
­
1.3
(
E)
0.07
­

Detection
Limit
(
ppb):
0.003
(
75%)
0.02
(
25%)
0.014
(
75%)
0.0058
(
23%)
1.5
Table
II.
D.
1.11.
Detections
for
carbofuran
and
its
metabolites
by
region
and
time
from
USGS
NAWQA
ground
water
monitoring
sites
1993­
1996
1997­
1999
2000­
2003
Grand
Total
Region
Det.
Ttl
No.
Det.
Ttl
No.
Det.
Ttl
No.
Det.
Ttl
No.

Middle
Atlantic
10
419
6
137
2
151
18
707
Midwest
4
577
2
439
3
511
9
1527
New
England
1
131
­­
39
1
116
2
286
Pacific
­­
437
8
169
1
286
9
892
Rocky
Mountain
2
434
­­
202
4
290
6
926
Southeast
3
616
4
482
4
567
11
1665
Southwest
1
273
­­
141
2
141
3
555
Grand
Total
21
2887
20
1609
17
2062
58
6558
NAWQA
monitored
for
five
other
carbamates
in
groundwater,
as
listed
below.

Methiocarb:
0
detections
out
of
4274
samples
Propoxur:
8
detections
out
of
4248
samples
Range:
0.0057
to
0.3
ppb
Average:
0.064
ppb
Locations:
Delaware,
Florida,
Georgia,
Maryland,
Virginia
Oxamyl:
12
detections
out
of
4222
samples
Range:
0.02
to
2.56
ppb
Average:
1.01
ppb
Locations:
British
Columbia,
Illinois,
Minnesota,
Washington
Methomyl:
3
detections
out
of
4224
samples
II.
D.
1
­
Page
21
of
21
Range:
0.04
to
0.38
ppb
Average:
0.28
ppb
Locations:
Minnesota,
New
Jersey,
Virginia
Carbaryl:
58
detections
out
of
6575
samples
Range:
0.002
to
0.539
ppb
Average:
0.027
ppb
95th
percentile:
0.0525
ppb
Locations:
Middle
Atlantic
(
41%),
Midwest
(
7%),
New
England
(
10%),
Pacific
(
3%),
Rocky
Mountain
(
5%),
Southeast
(
21%),
Southwest
(
12%)