Overview
Mammoth Community WWTF serves approximately 20,185 people in Mono County, California. The plant treats wastewater from the Mammoth Lakes area and discharges into the local watershed.
Mammoth Community WWTF is a municipal wastewater treatment facility located in Mono County, California, serving a population of around 20,185. The plant is situated in the Eastern Sierra region, near the town of Mammoth Lakes, a popular resort area. As a medium-sized agglomeration, the facility plays a key role in managing wastewater for the local community and supporting the region's tourism economy. The plant operates under the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for discharges to surface waters. For facilities of this scale in California, secondary treatment is typically mandated, with additional nutrient removal in sensitive watersheds. It is expected to meet state and federal standards for effluent quality. The treated effluent is discharged into the Owens River basin, which flows south through the Owens Valley to the Los Angeles Aqueduct system. The watershed supports diverse aquatic life and is an important water source for downstream communities. The plant's operations are critical for protecting water quality in the Eastern Sierra, a region known for its pristine lakes and recreational opportunities.
Environmental context
The plant discharges into the Owens River watershed, which drains southward through the Owens Valley to the Los Angeles Aqueduct and ultimately to the Pacific Ocean. The receiving waters support a variety of fish and wildlife, including the Owens sucker and other native species. The region is ecologically sensitive due to its high-altitude environment and reliance on snowmelt for water supply.
Frequently asked questions
Mammoth Community WWTF is located on Tree Plant Road in Mono County, California, near the town of Mammoth Lakes in the Eastern Sierra region.
The plant serves approximately 20,185 people, covering the Mammoth Lakes area and surrounding communities in Mono County.
The treated effluent is discharged into the Owens River watershed, which flows south through the Owens Valley and eventually reaches the Los Angeles Aqueduct system.
The plant operates under the U.S. Clean Water Act, requiring an NPDES permit issued by the California State Water Resources Control Board or the Lahontan Regional Water Quality Control Board.
For medium-sized agglomerations in California, secondary treatment is standard, with possible advanced treatment for nutrient removal in sensitive watersheds like the Eastern Sierra.
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