Overview
Colton WWTF is a municipal wastewater treatment facility serving approximately 60,100 residents in Colton, California. The plant operates under the U.S. Clean Water Act framework, discharging treated effluent into the Santa Ana River watershed.
Colton WWTF is a municipal wastewater treatment facility located in Colton, California, serving an estimated population of 60,100. The plant is situated in San Bernardino County and is part of the region's critical water infrastructure, managing wastewater from residential and commercial sources. As a medium-sized agglomeration, the plant is subject to the U.S. Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting requirements. For facilities of this scale, secondary treatment is typically mandated, with potential additional nutrient removal requirements to protect downstream water quality. The plant's treatment processes are designed to meet state and federal effluent standards. The treated wastewater from Colton WWTF ultimately discharges into the Santa Ana River, which flows through Southern California to the Pacific Ocean. The Santa Ana River watershed supports diverse aquatic habitats and is an important water resource for the region. The plant's operations play a key role in protecting this river system and the downstream coastal environment from pollution.
Environmental context
Colton WWTF discharges into the Santa Ana River, which flows southwest through San Bernardino and Orange Counties before reaching the Pacific Ocean at Huntington Beach. The Santa Ana River watershed is a vital ecological corridor in arid Southern California, supporting riparian habitats and providing water for agriculture and urban use. The river's lower reaches are ecologically sensitive, hosting migratory birds and aquatic species. Effective wastewater treatment is essential to prevent nutrient loading and maintain water quality in this stressed watershed.
Frequently asked questions
Colton WWTF is located at 1256 Rancho Avenue in Colton, San Bernardino County, California, United States.
Colton WWTF serves approximately 60,100 residents in the city of Colton and surrounding areas.
The treated wastewater from Colton WWTF is discharged into the Santa Ana River, which flows through Southern California to the Pacific Ocean.
Colton WWTF operates under the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. The plant must meet secondary treatment standards and any additional state requirements to protect the Santa Ana River watershed.
In California, wastewater treatment plants serving approximately 60,000 people typically employ secondary treatment processes, such as activated sludge or trickling filters, to meet NPDES permit limits. Some facilities also incorporate tertiary treatment for nutrient removal to comply with regional water quality standards.
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