NAC445A.1804. Carson Region: Carson River, East Fork at U.S. Highway 395 south of Gardnerville.

The limits of this table apply to the body of water known as the East Fork of the Carson River from the California-Nevada state line to the Riverview Mobile Home Park at U.S. Highway 395 south of Gardnerville, except for the length of the river within the exterior borders of the Washoe Indian Reservation. This segment of the East Fork of the Carson River is located in Douglas County.

STANDARDS OF WATER QUALITY

Carson River, East Fork at U.S. Highway 395 south of Gardnerville

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							Rainbow trout and brown trout.
Temperature - °C ΔTb - °C	ΔT		= 0	S.V. Nov-May S.V. Jun S.V. Jul S.V. Aug-Oct ΔT		≤ 13 ≤ 17 ≤ 21 ≤ 22 ≤ 2			*	X
pH - SU	S.V.		7.5 - 8.6	S.V. ΔpH		6.5 - 9.0 ± 0.5	X	X	X	*		X	X	*
Dissolved Oxygen - mg/l				S.V. Nov-May S.V. Jun-Oct		≥ 6.0 ≥ 5.0	X		*	X	X	X		X
Total Phosphates (as P) - mg/l				A-Avg.		≤ 0.10			*	*	X	X
Nitrogen Species (as N) - mg/l	Total Nitrogen			Nitrate S.V. Nitrite S.V.		≤ 10 ≤ 0.06	X		*	X	X	*		X
	A-Avg. S.V.	≤ 0.4 ≤ 0.5
Total Ammonia (as N) - mg/l				c					*
Suspended Solids - mg/l				S.V.		≤ 80			*
Turbidity - NTU				S.V.		≤ 10			*			X
Color - PCU	d			S.V.		≤ 75						*
Total Dissolved Solids - mg/l	A-Avg. S.V.	≤ 120 ≤ 175		A-Avg.		≤ 500	X	X				*
Chloride - mg/l	A-Avg. S.V.	≤ 6 ≤ 10		S.V.		≤ 250	X	X				*		X
Sulfate - mg/l				S.V.		≤ 250						*
Sodium - SAR	A-Avg.	≤ 2		A-Avg.		≤ 8		*				X
Alkalinity (as CaCO3) - mg/l				< 25% change from natural conditions					*					X
E. coli - No./100 ml				A.G.M. S.V.	≤ 126 ≤ 410					*	X
Fecal Coliform - No./100 ml	A.G.M. S.V.	≤ 20 ≤ 85		S.V.		≤ 1,000	X	*			X	X		X

* = The most restrictive beneficial use.

X = Beneficial use.

^a     Refer to NAC 445A.122 and 445A.1792 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 color must not be more than 10 PCU above natural conditions.

     (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)