Florence NFID Wastewater Treatment Plant, Florence, Arizona

Florence NFID is a municipal wastewater treatment facility located in Florence, Arizona, within Pinal County. The plant serves a population of approximately 3,540 residents, classifying it as a small agglomeration under US regulatory frameworks. Its location in the arid Southwest shapes its operational context, where water reuse and conservation are critical. The plant provides secondary treatment, which is the standard minimum for municipal wastewater under the US Clean Water Act. With a designed capacity of 1,589.87 volume units and a current discharge volume of 681.37, the facility operates below its full capacity. As a US-based plant, it is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Arizona Department of Environmental Quality, ensuring compliance with effluent limits. The treated effluent is discharged into the local watershed, which ultimately drains into the Gila River basin. This river system is a vital water source for agriculture and ecosystems in the Sonoran Desert. The plant's operations help protect downstream water quality in a region where water resources are scarce and highly valued.

The plant discharges into the Gila River watershed, a major tributary of the Colorado River. This arid region relies on treated wastewater to maintain base flows and support riparian habitats. Downstream, the water contributes to the Colorado River system, which supplies millions of users and sustains diverse desert wildlife. Protecting water quality here is essential for both ecological health and human use in a water-stressed environment.