Statutes, codes, and regulations
Nevada Administrative Code
Chapter 445A - Water ControlsWATER POLLUTION CONTROL
Standards for Water Quality
Section 445A.1692 - Truckee Region: Truckee River at Derby Dam

Nev. Admin. Code § 445A.1692

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Current through November 8, 2024
Section 445A.1692 - Truckee Region: Truckee River at Derby Dam

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]pH6.5 - 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/le *
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 - PCUf 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.

Nev. Admin. Code § 445A.1692

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