Prevention Of Significant Deterioration (PSD) delegation agreements allow state agencies to issue PSD permits on EPA's behalf. The permit issued is a federal permits under 40 CFR 52.21.

• Maricopa PSD Delegation Agreement (signed) (PDF)(9 pp, 361 K, 02/08/2016)
  Agreement for Delegation of the Federal Prevention of Significant Deterioration (PSD) Program Set Forth In 40 CFR 52.21 by the United States Environmental Protection Agency, Region 9 to the Maricopa County Air Quality Department - February 8, 2016