Nevada Administrative Code › Chapter 445A - Water Controls › WATER POLLUTION CONTROL › Standards for Water Quality › Section 445A.2154 - Colorado Region: Inner Las Vegas Bay

Current through June 11, 2024
The limits of this table apply to the body of water known as
				  Inner Las Vegas Bay, consisting of Lake Mead from the confluence of the Las
				  Vegas Wash with Lake Mead to 1.2 miles into Las Vegas Bay. Inner Las Vegas Bay
				  is located in Clark County.
STANDARDS OF WATER QUALITY
Inner Las Vegas Bay
PARAMETER
REQUIREMENTS TO MAINTAIN EXISTING HIGHER
								QUALITY
WATER QUALITY CRITERIA TO PROTECT BENEFICIAL
								USES
Beneficial Usesa
Livestock
Irrigation
Aquatic
Contact
Noncontact
Municipal
Industrial
Wildlife
Aesthetic
Enhance
Marsh
Beneficial Uses
X
X
X
X
X
X
X
Aquatic Life Species of Concern
Warm-water fishery.
Temperature [DELTA]Tb -
								°C
[DELTA]T = 0
[DELTA]T <= 2
*
pH - SU
95% of S.V. samples <= 8.9
S.V. 6.5 - 9.0
*
Dissolved Oxygen - mg/L
S.V.>= 5.0c
*
Total Inorganic Nitrogen (as N) - mg/L
95% of S.V. samples <= 5.3
*
Nitrate (as N) - mg/L
S.V. <= 90
*
Nitrite (as N) - mg/L
S.V.<= 5
*
Total Ammonia (as N) -mg/L
d
*
Total Suspended Solids -mg/L
S.V. <= 25
*
Turbidity - NTU
e
S.V. <= 25
*
Total Dissolved Solids -mg/L 
								f
S.V. <= 3000
*
E. coli - cfu/100
								mLg
G.M. <= 126
S.V. <= 410
*
Fecal Coliform No./100mL
<= 200/400h
*
Toxic Materials
i
* = 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.
c Applies to the epilimnion when
				  stratified, or average in water column during periods of
				  nonstratification.
d The requirement for water quality
				  with regard to the concentration of total ammonia is provided pursuant to the
				  provisions of NAC
				  445A.118. Data must be collected
				  at Station LWLVB 1.2. Station LWLVB 1.2 is located at the center of the channel
				  at a distance of 1.2 miles into Las Vegas Bay from the confluence of the Las
				  Vegas Wash with Lake Mead.
e Turbidity must not exceed that
				  characteristic of natural conditions by more than 10 NTU.
f The salinity standards for the
				  Colorado River system are specified in NAC
				  445A.1233.
g The geometric mean must not be
				  exceeded in any 30-day period. The single value must not be exceeded in more
				  than 10 percent of the samples collected within any 30-day period.
h Any discharge from a point source
				  into Las Vegas Wash must not exceed a log mean of 200 per 100 milliliters based
				  on a minimum of not less than five samples taken over a 30-day period, nor may
				  more than 10 percent of the total samples taken during any 30-day period exceed
				  400 per 100 milliliters.
i The water quality criteria for
				  toxic materials are specified in NAC
				  445A.1236.
The Commission recognizes that water quality standards for
				  the inner Las Vegas Bay may be exceeded during storm and flash flood events.
				  During these events, the beneficial use of contact recreation may not be
				  protected.
Added to NAC by
				  Environmental Comm'n by R160-06, eff. 8-26-2008; A by
				  R037-19A,
				  eff. 10/22/2019
NRS
				  445A.425,
				  445A.520