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).

NEW Temporary SWPPP Template updates/Instructions for the 2025 Construction General Permit.

ADOT's SWPPP Templates are in the process of being updated to reflect changes in the 2025 Construction General Permit. Please continue to use ADOT's current SWPPP templates WITH the additional items contained in the 2025 CGP SWPPP Template Temporary Guidance documents.

• Temporary 2025 CGP SWPPP Template Guidance Docs