NAC445A.1914. Walker Region: Walker Lake.

The limits of this table apply to the entire body of water known as Walker Lake. Walker Lake is located in Mineral County.

STANDARDS OF WATER QUALITY

Walker Lake

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
Aquatic Life Species of Concern						Tui chub, Tahoe sucker, and adult and juvenile Lahontan cutthroat trout.
Temperature - °C ΔTb - °C			ΔT		≤ 2			*
pH - SU			S.V.		6.5 - 9.7			*	X				X
Dissolved Oxygen - mg/l			S.V.		≥ 5d			*	X	X			X
Total Phosphates (as P) - mg/l			S.V.		≤ 0.82			*
Nitrogen Species (as N) - mg/l	Total Inorganic Nitrogen		Nitrate S.V. Nitrite S.V.		≤ 90 ≤ 0.06			*					X
	S.V.	≤ 0.3
Total Ammonia (as N) - mg/l			c					*
Suspended Solids - mg/l			S.V.		≤ 25			*
E. coli - No./100 ml			A.G.M. S.V.	≤ 126 ≤ 235					*	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.

^c     The ambient water quality criteria for ammonia are specified in NAC 445A.118.

^d     When lake is stratified, the dissolved oxygen applies only to the epilimnion.

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