Water Resources

In Arizona, water resources include surface waters, riparian areas, intermittent streams and ephemeral drainages. The Clean Water Act (CWA) of 1972 was established with the objective of restoring and preserving the chemical, physical, and biological integrity of the nation's waters by preventing point and nonpoint sources of pollution, providing assistance to publicly owned wastewater treatment plants, and maintaining the integrity of wetlands.

EPG also assesses the potential for point source discharges of pollution, which is regulated under Section 402 of the CWA and permitted with Arizona or National Pollutant Discharge Elimination System Permits (AZPDES/NPDES).

ALERT NEW 2025 CONSTRUCTION GENERAL PERMIT IS ACTIVE.

CB 25-02 - New 2025 Construction General Permit

Also note that the SWPPP Related Templates are in the process of being updated.  For the time being, ADOT projects may use the existing SWPPP related templates WITH the SWPPP amendments outlined in the Construction General Permit guidance.