Nev. Admin. Code § 445A.1824

Current through November 8, 2024

Section 445A.1824 - Carson Region: Carson River at Lahontan Dam

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.

Nev. Admin. Code § 445A.1824

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