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        Total Maximum Daily Loads (TMDLs)

        Hoover Dam

        Total maximum daily loads or TMDLs are an assessment of the amount of pollutant a waterbody can receive and not violate water quality standards. A TMDL determines how much pollutant load a lake or stream can assimilate. TMDLs take into account pollution from all sources, including discharges from sewage treatment facilities and industry; runoff from farms, forests and urban areas; and natural sources.

        TMDLs provide a way to integrate the management of both point and nonpoint sources of pollution through the establishment of wasteload allocations (WLA) for point source discharges and load allocations (LA) for nonpoint sources of pollution.

        Additional TMDL Information

        Approved TMDLs

        WaterbodyReach DescriptionTMDL ParametersDocuments

        Brockliss Slough, including East and West Branches

        From its divergence from the Carson River, West Fork to its confluence with the Carson River

        Turbidity

        Carson (TSS & Turbidity) TMDL

        Bryant Creek

        From the Nevada-California state line to its confluence with the East Fork of the Carson River

        Arsenic, Iron, Nickel, Total Suspended Solids (TSS), Turbidity

        Bryant Creek TMDL

        Carson River

        From Weeks Bridge at Highway 95 to Lahontan Reservoir

        Phosphorus (Total)

        Carson TP TMDL

        Carson River

        From Genoa Lane to Cradlebaugh Bridge

        Phosphorus (Total), Total Suspended Solids (TSS), Turbidity

        Carson TP TMDL
        Carson (TSS & Turbidity) TMDL

        Carson River

        Cradlebaugh Bridge to Mexican Ditch Gage

        Phosphorus (Total), Total Suspended Solids (TSS), Turbidity

        Carson TP TMDL
        Carson (TSS & Turbidity) TMDL

        Carson River

        From Mexican Ditch Gage to New Empire

        Phosphorus (Total), Total Suspended Solids (TSS), Turbidity

        Carson TP TMDL
        Carson (TSS & Turbidity) TMDL

        Carson River

        From New Empire to Dayton Bridge

        Phosphorus (Total), Total Suspended Solids (TSS), Turbidity

        Carson TP TMDL
        Carson (TSS & Turbidity) TMDL

        Carson River

        Dayton Bridge to Weeks Bridge at Highway 95

        Phosphorus (Total), Total Suspended Solids (TSS), Turbidity

        Carson TP TMDL
        Carson (TSS & Turbidity) TMDL

        Carson River, East and West Forks and Carson River

        Carson River, East Fork from Muller Lane to the West Fork, Carson River, West Fork from Muller Lane to the East Fork, and Carson River from the confluence of the East and West Forks to Genoa Lane

        Phosphorus (Total), Total Suspended Solids (TSS), Turbidity

        Carson TP TMDL
        Carson (TSS & Turbidity) TMDL

        Carson River, East Fork

        From Nevada-California state line to Riverview Mobile Home Park

        Total Suspended Solids (TSS), Turbidity

        Carson (TSS & Turbidity) TMDL

        Carson River, East Fork

        From Riverview Mobile Home Park to Highway 88

        Phosphorus (Total), Total Suspended Solids (TSS), Turbidity

        Carson TP TMDL
        Carson (TSS & Turbidity) TMDL

        Carson River, East Fork

        From Highway 88 to Muller Lane

        Phosphorus (Total), Total Suspended Solids (TSS), Turbidity

        Carson TP TMDL
        Carson (TSS & Turbidity) TMDL

        Carson River, West Fork

        From the Nevada-California state line to Muller Lane

        Phosphorus (Total), Total Suspended Solids (TSS), Turbidity

        Carson TP TMDL
        Carson (TSS & Turbidity) TMDL

        Dixie Creek

        From its origin to its confluence with the Humboldt River, South Fork

        Temperature

        Dixie and Hanks TMDL

        Hanks Creek

        From its origin to its confluence with the Marys River

        Temperature

        Dixie and Hanks TMDL

        Humboldt River

        From Osino to Palisade

        Phosphorus (Total), Total Suspended Solids (TSS)

        Humboldt River TMDL

        Humboldt River

        From Palisade to Battle Mountain

        Phosphorus (Total), Total Suspended Solids (TSS)

        Humboldt River TMDL

        Humboldt River

        From Battle Mountain to Comus

        Phosphorus (Total), Total Dissolved Solids, Total Suspended Solids (TSS)

        Humboldt River TMDL

        Humboldt River

        From Comus to Imlay

        Phosphorus (Total), Total Dissolved Solids, Total Suspended Solids (TSS)

        Humboldt River TMDL

        Lake Tahoe

        The entire Lake (Nevada Portion only)

        Clarity

        Lake Tahoe TMDL

        Las Vegas Wash

        Las Vegas Wash from the Historic Lateral to its confluence with Lake Mead

        Ammonia (Total), Chlorophyll-a, Phosphorus (Total)

        Las Vegas Wash, Las Vegas Bay and Lake Mead TMDL Evaluation

        Mill Creek

        From the West line of section 11, T. 45 N., R. 53 E., M.D.B. & M. to the Owyhee River

        Cadmium, Copper, Iron, Dissolved Oxygen, pH, Phosphorus (Total), Temperature, Total Dissolved Solids, Total Suspended Solids (TSS), Turbidity

        Owyhee Rv. and Mill Ck. TMDL

        Owyhee River

        From Wildhorse Reservoir to its confluence with Mill Creek

        Iron, Phosphorus (Total), Temperature, Total Suspended Solids (TSS), Turbidity

        Owyhee Rv. and Mill Ck. TMDL

        Owyhee River

        From its confluence with Mill Creek the border of the Duck Valley Indian Reservation

        Copper, Iron, Phosphorus (Total), Temperature, Total Suspended Solids (TSS), Turbidity

        Owyhee Rv. and Mill Ck. TMDL

        Rio Tinto Gulch

        From its origin to Mill Creek

        Cadmium, Copper, Iron, Dissolved Oxygen, pH, Phosphorus (Total), Temperature, Total Dissolved Solids, Total Suspended Solids (TSS), Turbidity

        Owyhee Rv. and Mill Ck. TMDL

        Truckee River

        From East McCarran Blvd to Lockwood

        Nitrogen (Total), Phosphorus (Total), Total Dissolved Solids

        Case Study
        Truckee River TMDL

        Truckee River

        From Lockwood to Derby Dam

        Nitrogen (Total), Phosphorus (Total), Total Dissolved Solids

        Case Study
        Truckee River TMDL

        Truckee River

        From Derby Dam to Wadsworth

        Nitrogen (Total), Phosphorus (Total), Total Dissolved Solids

        Case Study
        Truckee River TMDL

        Virgin River

        From the Nevada-Arizona state line to Mesquite

        Boron

        Virgin River TMDL

        Virgin River

        From Mesquite to river mouth at Lake Mead

        Boron

        Virgin River TMDL

        Walker Lake

        The entire lake

        Total Dissolved Solids

        Walker Lake TMDL

        Walker River

        From the confluence of Walker River, West and East Forks to the boundary of the Walker River Indian Reservation

        Total Suspended Solids (TSS)

        Walker River TMDL

        Walker River, East Fork

        From the Walker River, East Fork at the Nevada-California state line to Bridge B-1475

        Total Suspended Solids (TSS)

        Walker River TMDL

        Walker River, East Fork

        From Bridge B-1475 to its confluence with the Walker River, West Fork

        Total Suspended Solids (TSS)

        Walker River TMDL

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