Pima WWTF - Advanced Wastewater Treatment in Graham County, Arizona

Pima WWTF is a wastewater treatment facility located in Graham County, Arizona, serving a small population of approximately 1,918 residents. The plant provides advanced treatment, ensuring high-quality effluent before discharge. It is situated inland, far from coastal areas, and operates within the regulatory framework of the U.S. Clean Water Act, which governs wastewater discharges through the National Pollutant Discharge Elimination System (NPDES) permit program. The plant's designed capacity is 904.71 units, and it currently treats an average daily flow of 181.70 units, indicating significant reserve capacity. Advanced treatment processes typically include nutrient removal and disinfection, meeting stringent standards for protecting water quality. As a small agglomeration, the facility is subject to state-level permitting and monitoring requirements under the Clean Water Act. The treated effluent from Pima WWTF is discharged into a local water body, which eventually drains into the Gila River watershed. The Gila River flows through arid southwestern landscapes, supporting diverse aquatic and riparian habitats. The plant's advanced treatment helps protect downstream water quality in this ecologically sensitive region, where water resources are scarce and highly valued.

Pima WWTF discharges into a local watercourse that is part of the Gila River basin, a major tributary of the Colorado River. The Gila River flows through arid and semi-arid regions, supporting critical riparian ecosystems and providing habitat for native fish and wildlife. The plant's advanced treatment ensures minimal nutrient and pollutant loading, protecting downstream water quality in a water-stressed environment where every drop counts.