Nevada Administrative Code › Chapter 445A - Water Controls › WATER POLLUTION CONTROL › Standards for Water Quality › Section 445A.1824 - Carson Region: Carson River at Lahontan Dam

Current through June 11, 2024
The limits of this table apply to the entire body of water
				  known as Lahontan Reservoir. Lahontan Reservoir is located in Churchill and
				  Lyon Counties.
STANDARDS OF WATER QUALITY
Lahontan Reservoir
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
Walleye, channel catfish and white
								bass.
Temperature - °C
[DELTA]Tb -
								°C
[DELTA]T= 0
S.V. Nov-Mar[LESS THEN OR EQUAL TO] 11
S.V. Apr-Jun[LESS THEN OR EQUAL TO] 24
S.V. Jul-Oct[LESS THEN OR EQUAL TO] 28
[DELTA][LESS THEN OR EQUAL TO] 2
*
X
pH - SU
S.V.6.5 - 9.0
[DELTA]pH ± 0.5
X
X
*
*
X
X
*
Dissolved Oxygen - mg/l
S.V.[GREATER THEN OR EQUAL TO]
								5.0c
X
*
X
X
X
X
Total Phosphorus (as P) - mg/l
Avg. Jun-Sep[LESS THEN OR EQUAL TO]
								0.09d
*
*
X
X
Nitrogen Species (as N) - mg/l
Total Nitrogen
A-Avg.[LESS THEN OR EQUAL TO] 1.3
S.V.[LESS THEN OR EQUAL TO] 1.7
Nitrate S.V.[LESSTHEN OR EQUAL TO] 10
Nitrite S.V. [LESS THEN OR EQUAL TO].
								1.0
X
*
X
X
*
X
Total Ammonia (as N) - mg/l
e
*
Suspended Solids - mg/l
S.V.[LESS THEN OR EQUAL TO] 25
*
Turbidity - NTU
A-Avg. [LESS THEN OR EQUAL TO] 15
S.V. [LESS THEN OR EQUAL TO] 27
S.V. [LESS THEN OR EQUAL TO] 50
*
X
Color - PCU
f
S.V.[LESS THEN OR EQUAL TO] 75
*
Total Dissolved Solids - mg/l
A-Avg. [LESS THEN OR EQUAL TO] 175
S.V. [LESS THEN OR EQUAL TO] 225
A-Avg. [LESS THEN OR EQUAL TO] 500
X
X
*
Chloride - mg/l
A-Avg. [LESS THEN OR EQUAL TO] 9
S.V. [LESS THEN OR EQUAL TO] 15
1-hour Avg. [LESS THEN OR EQUAL TO]
								860g
96-hour Avg. [LESS THEN OR EQUAL TO] 230
X
*
X
X
Sulfate - mg/l
A-Avg. [LESS THEN OR EQUAL TO] 35
S.V. [LESS THEN OR EQUAL TO] 50
S.V. [LESS THEN OR EQUAL TO] 250
*
Sodium - SAR
A-Avg.[LESS THEN OR EQUAL TO] 2
A-Avg. [LESS THEN OR EQUAL TO] 8
*
X
Alkalinity (as CaCO3) -
								mg/l
S.V. [GREATER THEN OR EQUAL TO] 20
*
X
E. coli - No./100 ml
A.G.M.[LESS THEN OR EQUAL TO] 126
S.V. [LESS THEN OR EQUAL TO] 235
*
X
Fecal Coliform - No./100 ml
A.G.M. [LESS THEN OR EQUAL TO] 25
S.V. [LESS THEN OR EQUAL TO] 75
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.1792 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 reservoir is stratified,
				  the dissolved oxygen criterion applies only to epilimnion.
d June-September average for a
				  basin within the upper meter of the water column.
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.
g One-hour and 96-hour average
				  concentration limits may be exceeded only once every 3 years.
Added to NAC by
				  Environmental Comm'n by R160-06, eff. 8-26-2008; A by R131-12, 12-20-2012; A by
				  R101-14,
				  eff. 4/4/2016
NRS
					 445A.425,
					 445A.520