The Maricopa County Environmental Services Stormwater Program is responsible for maintaining the MS4 permit requirements for stormwater discharges in unincorporated urbanized areas of Maricopa County.
The Maricopa County Environmental Services Stormwater Program is responsible for maintaining the MS4 permit requirements for stormwater discharges in unincorporated urbanized areas of Maricopa County.
Complaint line (602) 506-6616 or
