Nevada Administrative Code
Chapter 445A - Water Controls
WATER POLLUTION CONTROL
Standards for Water Quality
Section 445A.1894 - Walker Region: Walker River, West Fork at the East Fork of the Walker River

Universal Citation: NV Admin Code 445A.1894
Current through September 16, 2024

The limits of this table apply to the body of water known as the West Fork of the Walker River near Wellington to its confluence with the East Fork of the Walker River near Nordyke Road. This segment of the West Fork of the Walker River is located in Lyon County.

STANDARDS OF WATER QUALITY

Walker River, West Fork at the East Fork of the Walker River

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 Brown trout and rainbow trout.
Temperature - °C [DELTA]Tb - °C [DELTA]T = 0 S.V. Nov-Apr S.V. May-Jun S.V. Jul-Oct DT [LESS THEN OR EQUAL TO] 13 [LESS THEN OR EQUAL TO] 17 [LESS THEN OR EQUAL TO] 23 [LESS THEN OR EQUAL TO] 2 * X
pH - SU S.V. [DELTA]pH 6.5 - 9.0 ± 0.5 X X * * X X X
Dissolved Oxygen - mg/l S.V. Nov-May S.V. Jun-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 S.V. [LESS THEN OR EQUAL TO] 0.15 A-Avg. [LESS THEN OR EQUAL TO] 0.10 * * X X
Nitrogen Species (as N) - mg/l Total Nitrogen Nitrate S.V. Nitrite S.V. [LESS THEN OR EQUAL TO] 10 [LESS THEN OR EQUAL TO] 0.06 X * X X * X
A-Avg. S.V. [LESS THEN OR EQUAL TO] 1.0 [LESS THEN OR EQUAL TO] 1.2
Total Ammonia (as N) - mg/l c *
Suspended Solids - mg/l S.V. [LESS THEN OR EQUAL TO] 80 *
Turbidity - NTU d * X
Color - PCU S.V. [LESS THEN OR EQUAL TO] 46 S.V. [LESS THEN OR EQUAL TO] 75 X *
Total Dissolved Solids - mg/l A-Avg. S.V. [LESS THEN OR EQUAL TO] 330 [LESS THEN OR EQUAL TO] 425 A-Avg. [LESS THEN OR EQUAL TO] 500 X X *
Chloride - mg/l A-Avg. S.V. [LESS THEN OR EQUAL TO] 22 [LESS THEN OR EQUAL TO] 28 S.V. [LESS THEN OR EQUAL TO] 250 X X * X
Sulfate - mg/l S.V. [LESS THEN OR EQUAL TO] 74 S.V. [LESS THEN OR EQUAL TO] 250 *
Sodium - SAR 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

* = The most restrictive beneficial use.

X = Beneficial use.

a Refer to NAC 445A.122 and 445A.1882 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 The ambient water quality criteria for ammonia are specified in NAC 445A.118.

d Increase in turbidity must not be more than 10 NTU above natural conditions.

Added to NAC by Environmental Comm'n by R160-06, eff. 8-26-2008

NRS 445A.425, 445A.520

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