Nevada Administrative Code › Chapter 445A - Water Controls › WATER POLLUTION CONTROL › Standards for Water Quality › Section 445A.1692 - Truckee Region: Truckee River at Derby Dam

Current through June 11, 2024
The limits of this table apply to the body of water known as
				  the Truckee River from the Lockwood Bridge to Derby Dam. This segment of the
				  Truckee River is located in Storey and Washoe Counties.
STANDARDS OF WATER QUALITY
Truckee River at Derby Dam
PARAMETER
REQUIREMENTS TO MAINTAIN
							 EXISTING HIGHER QUALITY
WATER QUALITY STANDARDS FOR
							 BENEFICIAL USES
Beneficial
							 Usea
Livestock
Irrigation
Aquatic
Contact
Noncontact
Municipal
Industrial
Wildlife
Aesthetic
Enhance
Marsh
Beneficial Uses
X
X
X
X
X
X
X
X
Aquatic Life Species of Concern
Juvenile and adult rainbow trout and
							 brown trout. However, the species which are sensitive to temperature are
							 expected to seek a cooler microhabitat during July and August.
Temperature - °C
							 [DELTA]Tb - °C
DT
= 0
S.V. Nov-Mar S.V. Apr S.V. May S.V.
							 Jun-Oct [DELTA]T
[LESS THEN OR EQUAL TO] 13 [LESS THEN OR EQUAL TO]
							 21c [LESS THEN OR EQUAL TO]
							 22c,d [LESS THEN OR EQUAL TO]
							 23c,d [LESS THEN OR EQUAL TO] 2
*
X
pH - SU
S.V.
7.0 - 8.6
S.V. [DELTA]pH
6.5 - 9.0 ± 0.5
X
X
X
*
X
X
*
Dissolved Oxygen - mg/l
S.V. Nov-Mar S.V. Apr-Oct
[GREATER THEN OR EQUAL TO] 6.0 [GREATER THEN OR EQUAL
							 TO] 5.0
X
*
X
X
X
X
Total Phosphates (as P) - mg/l
A-Avg.
[LESS THEN OR EQUAL TO] 0.05
*
*
X
X
Nitrogen Species (as N) - mg/l
Total N A-Avg. Total N S.V. Nitrate S.V.
							 Nitrite S.V.
[LESS THEN OR EQUAL TO] 0.75 [LESS THEN OR EQUAL TO]
							 1.2 [LESS THEN OR EQUAL TO] 2.0 [LESS THEN OR EQUAL TO] 0.04
*
*
X
X
Total Ammonia (as N) - mg/l
e
*
Suspended Solids - mg/l
A-Avg. S.V.
[LESS THEN OR EQUAL TO] 24.0 [LESS THEN OR
							 EQUAL TO] 40.0
S.V.
[LESS THEN OR EQUAL TO] 50
*
Turbidity - NTU
A-Avg.
[LESS THEN OR EQUAL TO] 8.0
S.V.
[LESS THEN OR EQUAL TO] 10
*
X
Color - PCU
f
S.V.
[LESS THEN OR EQUAL TO] 75
*
Total Dissolved Solids - mg/l
A-Avg. S.V.
[LESS THEN OR EQUAL TO] 215.0 [LESS THEN
							 OR EQUAL TO] 265.0
A-Avg.
[LESS THEN OR EQUAL TO] 500
X
X
*
Chloride - mg/l
A-Avg. S.V.
[LESS THEN OR EQUAL TO] 21.0 [LESS THEN OR
							 EQUAL TO] 30.0
S.V.
[LESS THEN OR EQUAL TO] 250
X
X
*
X
Sulfate - mg/l
A-Avg. S.V.
[LESS THEN OR EQUAL TO] 39.0 [LESS THEN OR
							 EQUAL TO] 46.0
S.V.
[LESS THEN OR EQUAL TO] 250
*
Sodium - SAR
A-Avg. S.V.
[LESS THEN OR EQUAL TO] 1.5 [LESS THEN OR
							 EQUAL TO] 2.0
A-Avg.
[LESS THEN OR EQUAL TO] 8
*
X
Alkalinity (as CaCO3) -
							 mg/l
25% change from natural conditions
*
X
E. coli - No./100 ml
A.G.M. S.V.
[LESS THEN OR EQUAL TO] 126 [LESS THEN OR
							 EQUAL TO] 410
*
X
Fecal Coliform - No./100 ml
A.G.M. S.V.
[LESS THEN OR EQUAL TO] 80.0 [LESS THEN OR
							 EQUAL TO] 250
S.V.
[LESS THEN OR EQUAL TO] 1,000
X
*
X
X
X
* = The most restrictive beneficial use.
X = Beneficial use.
a Refer to NAC 445A.122 and
				  445A.1622 for beneficial use terminology.
b Maximum allowable increase in
				  temperature above water temperature at the boundary of an approved mixing zone,
				  but the increase must not cause a violation of the single value
				  standard.
c When flows are adequate to
				  induce spawning runs of cui-ui and Lahontan cutthroat trout, the standard is
				  14°C from April through June.
d The desired temperature for the
				  protection of juvenile Lahontan cutthroat trout is 21°C, even though that
				  temperature is not attainable at all times.
e The ambient water quality
				  criteria for ammonia are specified in NAC 445A.118.
f Increase in color must not be
				  more than 10 PCU above natural conditions.
Added to NAC by
				  Environmental Comm'n by R160-06, eff. 8-26-2008; A by R131-12,
				  12-20-2012
NRS
					 445A.425,
					 445A.520