Stormwater regulations apply to construction sites, industrial facilities and municipalities such as the City of El Mirage. The City operates under a Phase II Municipal Stormwater Permit issued by the Arizona Department of Environmental Quality. This permit requires the City to develop a Storm Water Management Plan (SWMP) identifying various best management practices (BMPs) to be implemented to reduce stormwater pollutants.
Any construction that disturbs over 1 acre(includes staging areas on unpaved land) is required to submit an NOI to ADEQ and obtain a Storm Water Pollution Prevention Plan(SWPPP). See the City of El Mirage’s SWPPP Guidance Document for more information. Construction projects of any size still must comply with City Code and prevent materials from entering the storm drain system. Please contact the Engineering Department with any questions.
Industrial facilities my be required to obtain a Multi Sector General Permit(MSGP) form ADEQ depending on the activities performed at the facility. The City is required to evaluate industrial facilities when a new facility is built, ownership changes, or there is a change in primary operation. Complete the Industrial Stormwater Survey to see if one is required.