NAC445A.1688. Truckee Region: Truckee River at Lockwood Bridge.

The limits of this table apply to the body of water known as the Truckee River from the East McCarran Boulevard Bridge to the Lockwood Bridge. This segment of the Truckee River is located in Storey and Washoe Counties.

STANDARDS OF WATER QUALITY

Truckee River at Lockwood Bridge

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					Juvenile and adult rainbow trout and brown trout.
Temperature - °C ΔTb - °C	DT	= 0	S.V. Nov-Mar S.V. Apr S.V. May S.V. Jun-Oct ΔT	≤ 13 ≤ 21c ≤ 22c,d ≤ 23c,d ≤ 2			*	X
pH - SU	S.V.	7.1 - 8.5	S.V. ∆pH	6.5 - 9.0 ± 0.5	X	X	X	*		X	X	*
Dissolved Oxygen - mg/l			S.V. Nov-Mar S.V. Apr-Oct	≥ 6.0 ≥ 5.0	X		*	X	X	X		X
Total Phosphates (as P) - mg/l			A-Avg.	≤ 0.05			*	*	X	X
Nitrogen Species (as N) - mg/l			Total N A-Avg. Total N S.V. Nitrate S.V. Nitrite S.V.	≤ 0.75 ≤ 1.2 ≤ 2.0 ≤ 0.04			*	*	X	X
Total Ammonia (as N) - mg/l			e				*
Suspended Solids - mg/l	A-Avg.	≤ 25.0	S.V.	≤ 50			*
Turbidity - NTU			S.V.	≤ 10			*			X
Color - PCU	f		S.V.	≤ 75						*
Total Dissolved Solids - mg/l	A-Avg. S.V.	≤ 210.0 ≤ 260.0	A-Avg.	≤ 500	X	X				*
Chloride - mg/l	A-Avg. S.V.	≤ 26.0 ≤ 30.0	S.V.	≤ 250	X	X				*		X
Sulfate - mg/l	A-Avg. S.V.	≤ 39.0 ≤ 46.0	S.V.	≤ 250						*
Sodium - SAR	A-Avg. S.V.	≤ 1.5 ≤ 2.0	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.	≤ 90.0 ≤ 300.0	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     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. The ΔT of ≤ 2°C is only for the Reno and Sparks Joint Wastewater Treatment Plant.

^c     When flows are adequate to induce spawning runs of cui-ui and Lahontan cutthroat trout, the standard is 14°C from April through June.

^d     The desired temperature for the protection of juvenile Lahontan cutthroat trout is 21°C, even though that temperature is not attainable at all times.

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

^f     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)