Nevada Administrative Code (Last Updated: January 6, 2015) |
Chapter445A Water Controls |
WATER POLLUTION CONTROL |
Standards for Water Quality |
NAC445A.2176. Colorado Region: Meadow Valley Wash.
- The limits of this table apply to the body of water known as the Meadow Valley Wash from the bridge above Rox to the Muddy River. The Meadow Valley Wash is located in Clark and Lincoln Counties.
STANDARDS OF WATER QUALITY
Meadow Valley Wash
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
ΔTb - °C
DT
= 0
S.V. Nov-Jun
S.V. Jul-Oct
DT
≤ 21
≤ 32
≤ 2
*
pH - SU
S.V.
DpH
6.5 - 9.0
± 0.5
X
X
*
X
X
*
Dissolved Oxygen - mg/l
S.V.
≥ 5.0
X
*
X
X
Total Phosphates
(as P) - mg/l
A-Avg.
≤ 0.1
*
X
Nitrogen Species
(as N) - mg/l
Total Nitrogen
Nitrate S.V.
Nitrite S.V.
≤ 90
≤ 5.0
X
*
X
X
A-Avg.
S.V.
≤ 2.0
≤ 3.3
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.
≤ 630
*
Fecal Coliform - No./100 ml
S.V.
≤ 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)