Peoria Butler WRF - Wastewater Treatment Plant in Peoria, Arizona

Peoria Butler WRF is a municipal wastewater treatment facility located in Peoria, Maricopa County, Arizona, serving a population of about 107,800. The plant is part of the region's water infrastructure, handling wastewater from residential and commercial sources in the growing Phoenix metropolitan area. As a US facility serving over 100,000 people, Peoria Butler WRF operates under the Clean Water Act's National Pollutant Discharge Elimination System (NPDES) permit program. The EPA and Arizona Department of Environmental Quality regulate such plants, requiring secondary treatment as a minimum standard to protect water quality. The plant's design and operations align with federal and state regulations for large agglomerations. The plant discharges treated effluent into the local watershed, which ultimately drains into the Gila River basin and contributes to the Colorado River system. This arid region relies heavily on water reclamation, making the plant's treatment performance critical for downstream water supply and ecosystem health in the Sonoran Desert.

The plant's treated effluent flows into the Gila River watershed, a major tributary of the Colorado River. This arid region faces water scarcity, so reclaimed water supports local streams and groundwater recharge. The downstream environment includes sensitive desert riparian habitats that depend on consistent flows for wildlife and vegetation. Protecting water quality in this basin is essential for both ecological balance and human water supply in the southwestern United States.