Nevada Administrative Code
Chapter 445A - Water Controls
WATER POLLUTION CONTROL
Standards for Water Quality
Section 445A.2164 - Colorado Region: Virgin River at Mesquite

Universal Citation: NV Admin Code 445A.2164
Current through September 16, 2024

The limits of this table apply to the body of water known as the Virgin River from the Arizona-Nevada state line to Mesquite. This segment of the Virgin River is located in Clark County.

STANDARDS OF WATER QUALITY

Virgin River at Mesquite

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
Aquatic Life Species of Concern
Temperature - °C [DELTA]Tb - °C DT = 0 S.V. Nov-Jun S.V. Jul-Oct DT [LESS THEN OR EQUAL TO] 21 [LESS THEN OR EQUAL TO] 32 [LESS THEN OR EQUAL TO] 2 *
pH - SU S.V. [DELTA]pH 6.5 - 9.0 ± 0.5 X X * X X *
Dissolved Oxygen - mg/l S.V. [GREATER THEN OR EQUAL TO] 5.0 X * X X
Total Phosphates (as P) - mg/l A-Avg. [LESS THEN OR EQUAL TO] 0.1 * X
Nitrogen Species (as N) - mg/l Total Nitrogen Nitrate S.V. Nitrite S.V. [LESS THEN OR EQUAL TO] 90 [LESS THEN OR EQUAL TO] 5.0 X * X X
A-Avg. S.V. [LESS THEN OR EQUAL TO] 0.9 [LESS THEN OR EQUAL TO] 1.6
Total Ammonia (as N) - mg/l c *
Turbidity - NTU d *
Color - PCU e *
Total Dissolved Solids - mg/l f X *
Alkalinity (as CaCO3) - mg/l 25% change from natural conditions * X
E. coli - No./100 ml A.G.M. [LESS THEN OR EQUAL TO] 630 *
Fecal Coliform - No./100 ml A.G.M. S.V. [LESS THEN OR EQUAL TO] 300 [LESS THEN OR EQUAL TO] 550 S.V. [LESS THEN OR EQUAL TO] 1,000 X * X X

* = The most restrictive beneficial use.

X = Beneficial use.

a Refer to NAC 445A.122 and 445A.2142 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.

e Increase in color must not be more than 10 PCU above natural conditions.

f The salinity standard for the Colorado River System is specified in NAC 445A.1233.

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

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