Overview
Duncan WWTF is a secondary treatment plant in Greenlee County, Arizona, serving approximately 700 people. It discharges 227.13 megaliters of treated wastewater annually.
Duncan WWTF is a municipal wastewater treatment facility located in Greenlee County, Arizona, United States. The plant serves a small population of around 700 residents, reflecting its role in a rural community. As a secondary treatment plant, Duncan WWTF provides biological treatment to remove organic matter and suspended solids. The plant has a designed capacity of 541.31 megaliters and currently discharges 227.13 megaliters annually. Under the U.S. Clean Water Act, such facilities operate under National Pollutant Discharge Elimination System (NPDES) permits, which set effluent limits to protect water quality. The treated effluent from Duncan WWTF is discharged into local waterways that drain into the Gila River basin, ultimately contributing to the Colorado River system. This watershed supports diverse aquatic habitats and is important for regional water resources in the arid Southwest.
Environmental context
The plant's discharge enters the Gila River watershed, which flows through Arizona and New Mexico before joining the Colorado River. This arid region relies on limited surface water, making effluent quality critical for downstream ecosystems and agricultural uses. The Gila River supports native fish species and riparian vegetation, and the plant's secondary treatment helps reduce nutrient loading.
Frequently asked questions
Duncan WWTF is located in Greenlee County, Arizona, United States, at coordinates 32.73 N, -109.104 W.
The plant serves approximately 700 people, reflecting its role in a small rural community.
The plant discharges treated effluent into local waterways that flow into the Gila River basin, part of the larger Colorado River system.
As a U.S. facility, Duncan WWTF operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Arizona Department of Environmental Quality.
For small populations, secondary treatment is standard under the Clean Water Act, providing biological treatment to reduce organic pollutants and suspended solids.
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