Statutes, codes, and regulations
Nevada Administrative Code
Chapter 445A - Water ControlsWATER POLLUTION CONTROL
Standards for Water Quality
Section 445A.1694 - Truckee Region: Truckee River at the Pyramid Lake Paiute Reservation

Nev. Admin. Code § 445A.1694

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Current through November 8, 2024
Section 445A.1694 - Truckee Region: Truckee River at the Pyramid Lake Paiute Reservation

The limits of this table apply to the body of water known as the Truckee River from Derby Dam to the exterior border of the Pyramid Lake Paiute Reservation. This segment of the Truckee River is located in Storey and Washoe Counties.

STANDARDS OF WATER QUALITY

Truckee River at the Pyramid Lake Paiute Reservation

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 Early spawning Lahontan cutthroat trout and their incubation, larvae, juveniles and migration, from May through June, depending on hydrologic conditions.
Temperature - °C [DELTA]Tb - °C DT = 0 S.V. Nov-Mar S.V. Apr-Jun S.V. Jul-Oct [DELTA]T [LESS THEN OR EQUAL TO] 13c [LESS THEN OR EQUAL TO] 14c [LESS THEN OR EQUAL TO] 25d [LESS THEN OR EQUAL TO] 2 * X
pH - SU S.V. 7.1 - 8.6 S.V. [DELTA]pH6.5 - 9.0 ± 0.5 X X X * X X *
Dissolved Oxygen - mg/l S.V. Nov-Jun S.V. July-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/le *
Suspended Solids - mg/l A-Avg. [LESS THEN OR EQUAL TO] 25.0 S.V. [LESS THEN OR EQUAL TO] 50 *
Turbidity - NTU S.V. [LESS THEN OR EQUAL TO] 10 * X
Color - PCUf S.V. [LESS THEN OR EQUAL TO] 75 *
Total Dissolved Solids - mg/l A-Avg. S.V. [LESS THEN OR EQUAL TO] 245.0 [LESS THEN OR EQUAL TO] 310.0 A-Avg. [LESS THEN OR EQUAL TO] 500 X X *
Chloride - mg/l A-Avg. S.V. [LESS THEN OR EQUAL TO] 20.0 [LESS THEN OR EQUAL TO] 28.0 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] 50 [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 13°C from November through March and 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.

Nev. Admin. Code § 445A.1694

Added to NAC by Environmental Comm'n by R160-06, eff. 8-26-2008; A by R131-12, 12-20-2012; R093-13, 12-23-2013

NRS 445A.425, 445A.520