Why do I need an Arizona Pollutant Discharge Elimination System (AZPDES) De Minimis General Permit?

This general permit provides a simpler, faster way to obtain permit coverage for certain types of non-stormwater discharges to surface waters of the United States, as an alternative to individual Arizona Pollutant Discharge Elimination System (AZPDES) permitting. “De Minimis discharge” is defined as a discharge to U.S. waters that: meets the applicable surface water quality standards; is a low-flow and/or low-frequency event, or is otherwise determined by ADEQ to have no significant impacts on water quality or the environment; is conducted with appropriate best management practices; and does not last continuously for more than 30 days unless ADEQ approves a longer discharge period.

This permit is available to cover discharges from potable water systems; hydrostatic testing of pipes, tanks and vessels; subterranean dewatering (groundwater from foundation, footer drain, basement, underground structure or construction dewatering); well purging; well development, maintenance, and aquifer testing; reclaimed water systems; uncontaminated air conditioning condensate or overflow from residential evaporative coolers; charitable noncommercial car washes; freshwater swimming pool drainage that has been dechlorinated; or other discharges determined by ADEQ to be eligible for specific approval.  Permit coverage can be temporary or long-term. With some exceptions, coverage is requested by submitting a Notice of Intent to ADEQ. If an NOI was submitted, the permittee must pay an annual fee if coverage lasts more than one year; and must submit a Notice of Termination (NOT) if/when the covered discharges permanently cease.

View AZPDES De Minimis General Permit (DMGP) | Download >

Single Source Notice of Intent (NOI) form | Download >

Areawide, Facilitywide or Projectwide Discharges NOI Form | Download >