Peoria manages stormwater under its MS4 permit from ADEQ. Illicit discharges to storm drains are prohibited. The city's rapid growth requires careful stormwater management. Development must incorporate retention and water quality measures. Monsoon season (July-September) brings flash flooding risks.
Peoria's stormwater program operates under an AZPDES MS4 permit. The program covers illicit discharge detection, construction site controls, post-construction management, and public education. Illicit discharges (oil, chemicals, wash water) to storm drains are prohibited. New development must incorporate stormwater retention and water quality treatment. Peoria's explosive growth in the northwest Valley has significantly increased impervious surfaces, making stormwater management critical. Monsoon season brings intense storms and flash flooding risk. The city coordinates with the Flood Control District of Maricopa County for regional flood management.
Illicit discharges result in city enforcement and potential state Clean Water Act penalties.
Peoria, AZ
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Side-by-side rule comparisons with other cities in Maricopa County.
See how other cities in Maricopa County handle stormwater management.
See how Peoria's stormwater management rules stack up against other locations.
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