Nev. Admin. Code § 445A.2154
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.
Nev. Admin. Code § 445A.2154