Overview
IEUA Regional Plant No1 in Chino, California serves approximately 480,000 people. The plant is part of the Inland Empire Utilities Agency's water recycling infrastructure.
IEUA Regional Plant No1 is a major wastewater treatment facility located in Chino, California, within the Inland Empire region of Southern California. It serves a population of about 479,792, making it a large-scale municipal treatment plant. The plant is operated by the Inland Empire Utilities Agency (IEUA), a regional water agency that provides wastewater treatment and recycled water services to several cities in San Bernardino County. As a large agglomeration serving nearly half a million people, the plant is subject to stringent regulations under the U. S. Clean Water Act, administered through the National Pollutant Discharge Elimination System (NPDES) permit program. The plant's designed capacity is 1.00 million gallons per day, indicating a substantial treatment capability. Plants of this scale typically employ advanced secondary or tertiary treatment to meet California's strict water quality standards, especially for recycled water use. The plant discharges treated wastewater into local waterways that ultimately drain into the Santa Ana River, which flows through Orange County to the Pacific Ocean. The Santa Ana River watershed is ecologically significant, supporting diverse aquatic habitats and providing water for agriculture and urban use. The plant's operations are critical for protecting downstream water quality and supporting water recycling efforts in the arid Southern California region.
Environmental context
The plant discharges into the Santa Ana River watershed, which flows through San Bernardino, Riverside, and Orange Counties before reaching the Pacific Ocean at Huntington Beach. This river system supports a variety of aquatic species and is an important water source for the region. The downstream environment includes sensitive coastal habitats, and the plant's advanced treatment helps reduce nutrient and pollutant loads that could impact marine ecosystems.
Frequently asked questions
IEUA Regional Plant No1 is located in Chino, California, within San Bernardino County. It is part of the Inland Empire Utilities Agency's network of water recycling plants.
The plant serves approximately 479,792 people, making it a large-scale municipal wastewater treatment facility in the Inland Empire region.
The plant discharges treated wastewater into the Santa Ana River watershed, which flows to the Pacific Ocean. The discharge is regulated under the Clean Water Act to protect water quality.
The plant operates under the U. S. Clean Water Act, with permits issued through the National Pollutant Discharge Elimination System (NPDES). California's stringent water quality standards also apply.
Plants of this scale typically employ advanced secondary or tertiary treatment to meet NPDES permit limits. Many also incorporate water recycling to address water scarcity in arid regions like Southern California.
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