NAC445A.1902. Walker Region: Walker River, East Fork at Bridge B-1475.

The limits of this table apply to the body of water known as the East Fork of the Walker River from the California-Nevada state line to Bridge B-1475. This segment of the East Fork of the Walker River is located in Lyon County.

STANDARDS OF WATER QUALITY

Walker River, East Fork at Bridge B-1475

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							Mountain whitefish, rainbow trout and brown trout.
Temperature - °C ΔTb - °C	DT		= 0	S.V. Nov-Apr S.V. May-Jun S.V. Jul-Oct DT		≤ 13 ≤ 17 ≤ 23 ≤ 2			*	X
pH - SU				S.V. ∆pH		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.		≤ 0.9 ≤ 1.7
Total Ammonia (as N) - mg/l				c					*
Suspended Solids - mg/l				S.V.		≤ 80			*
Turbidity - NTU				d					*			X
Color - PCU				S.V.		≤ 75			X			*
Total Dissolved Solids - mg/l	A-Avg. S.V.	≤ 320 ≤ 390		A-Avg.		≤ 500	X	X				*
Chloride - mg/l	A-Avg. S.V.	≤ 13 ≤ 19		S.V.		≤ 250	X	X				*		X
Sulfate - mg/l				S.V.		≤ 250						*
Sodium - SAR				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

* = The most restrictive beneficial use.

X = Beneficial use.

^a     Refer to NAC 445A.122 and 445A.1882 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.

     (Added to NAC by Environmental Comm’n by R160-06, eff. 8-26-2008)