Nevada Administrative Code (Last Updated: January 6, 2015) |
Chapter445A Water Controls |
WATER POLLUTION CONTROL |
Standards for Water Quality |
NAC445A.1702. Truckee Region: Gray Creek.
- The limits of this table apply to the body of water known as Gray Creek from its origin to the California-Nevada state line. Gray Creek is located in Washoe County.
STANDARDS OF WATER QUALITY
Gray Creek
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
Temperature - °C
Avg. Jun-Sep
S.V. Summer
S.V. Winter
≤ 20.0
≤ 25.0
≤ 13.0
*
X
pH - SU
S.V.
6.5 - 9.0
X
X
*
*
X
X
*
Dissolved
Oxygen - mg/l
S.V.
≥ 7.0
X
*
X
X
X
X
Total Phosphorus
(as P) - mg/l
S.V.
≤ 0.1b
*
*
X
X
Nitrogen Species
(as N)- mg/l
Nitrate S.V.
≤ 10
X
*
X
Nitrite S.V.
≤ 0.06
X
*
X
X
Total Nitrogen b
*
*
Total Ammonia (as N) - mg/l
c
*
Turbidity - NTU
S.V.
≤ 10
*
Color - PCU
S.V.
≤ 75
*
Total Dissolved
Solids - mg/l
S.V.
≤ 500
X
X
*
Chloride - mg/l
1-hr Avg.
96-hr Avg.
≤ 860d
≤ 230
X
*
X
X
Sulfate - mg/l
S.V.
≤ 250
*
E. coli - No./100 ml
A.G.M.
S.V.
≤ 126
≤ 410
*
X
Fecal Coliform - No./100 ml
S.V.
≤ 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 The water must not contain nutrient concentrations from a source other than a natural source which cause the growth of algae or aquatic plants in amounts that interfere with any beneficial uses of the water.
c The ambient water quality criteria for ammonia are specified in NAC 445A.118.
d One-hour and 96-hour average concentration limits may be exceeded only once every 3 years.
(Added to NAC by Environmental Comm’n by R160-06, eff. 8-26-2008; A by R127-10, 12-16-2010; R128-12 & R131-12, 12-20-2012)