NAC445A.2178. Colorado Region: Beaver Dam Wash.

The limits of this table apply to the body of water known as the Beaver Dam Wash above Schroeder Reservoir. The Beaver Dam Wash is located in Lincoln County.

STANDARDS OF WATER QUALITY

Beaver Dam Wash

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
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. DpH	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. S.V.		≤ 0.01 ≤ 0.013	A-Avg.	≤ 0.05			*	*	X	X
Nitrogen Species (as N) - mg/l	Nitrate S.V.		≤ 0.22	Nitrate S.V. Nitrite S.V.	≤ 10 ≤ 0.06	X		*	X	X	*		X
Total Ammonia (as N) - mg/l				c				*
Suspended Solids - mg/l				S.V.	≤ 25			*
Turbidity - NTU				S.V.	≤ 10			*			X
Color - PCU				d				*			X
Total Dissolved Solids - mg/l				e		X	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				S.V.	≤ 1,000	X	*			X	X		X

* = The most restrictive beneficial use.

X = Beneficial use.

^a     Refer to NAC 445A.122 and 445A.2142 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.

^e     The salinity standard for the Colorado River System is specified in NAC 445A.1233.

     (Added to NAC by Environmental Comm’n by R160-06, eff. 8-26-2008; A by R131-12, 12-20-2012)