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.

What discharges need De Minimis General Permit (DMGP) coverage?

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 (NOI) online through myDEQ


On June 1, 2021, ADEQ issued the 2021 AZPDES DMGP to replace the 2016 permit. To maintain coverage, all DMGP permittees must apply for a new NOI under the 2021 permit by July 30, 2021. There is a fee associated with the NOI application.

Get a new NOI | Go to myDEQ >

2021 Permit | View >

2021 Fact Sheet | View > 

Response to Comments | View >

View 2016 DMGP permit and reference materials | View >


Notice of Intent for Single Source: $250 at time of submission, then annual thereafter until permit is terminated 

Notice of Intent for Areawide/Projectwide/Facilitywide: $500 at time of submission, then annual thereafter until permit is terminated

Review of a Best Management Practices Plan (BMPP): $1,000 for the first review (only applies if a BMPP is submitted to ADEQ for review) and $500 for any re-review due to deficiencies

Paperless NOIs and NOTs with myDEQ

To submit a Notice of Intent (NOI) for DMGP coverage or a Notice of Termination (NOT), you will need to use myDEQ | Learn More >