NAC445A.1808. Carson Region: Carson River at Genoa Lane.

The limits of this table apply to the bodies of water known as the Carson River, including the East Fork of the Carson River from Muller Lane to the West Fork, the West Fork of the Carson River from the California-Nevada state line to the East Fork, and the main stem of the Carson River from the confluence of the East and West Forks to Genoa Lane. These segments of the Carson River are located in Douglas County.

STANDARDS OF WATER QUALITY

Carson River at Genoa Lane

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					Catfish, rainbow trout and brown trout.
Temperature - °C ΔTb - °C	ΔT	= 0	S.V. Nov-Apr S.V. May-Jun S.V. Jul-Oct ΔT	≤ 13 ≤ 17 ≤ 23 ≤ 2			*	X
pH - SU	S.V.	7.4 - 8.5	S.V. ΔpH	6.5 - 9.0 ± 0.5	X	X	X	*		X	X	*
Dissolved Oxygen - mg/l			S.V. Nov-Apr S.V. May-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.	≤ 0.8 ≤ 1.3
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.	≤ 165 ≤ 220	A-Avg.	≤ 500	X	X				*
Chloride - mg/l	A-Avg. S.V.	≤ 8 ≤ 12	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.	≤ 180	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)