Aurora enforces MS4 stormwater regulations under City Code Chapter 138. Illicit discharges to storm drains are prohibited, and construction sites over 1 acre need permits.
Aurora operates under an MS4 permit from the Colorado Department of Public Health and Environment. City Code Chapter 138 prohibits discharging anything other than rainwater to storm drains, including soapy car wash water, paint, oil, grass clippings, pet waste, and chlorinated pool water. Construction sites disturbing 1 acre or more must obtain a Colorado Discharge Permit (CDPS) plus city stormwater permit with erosion control plan. Violations carry fines up to 1,000 dollars per day. Report illicit discharges to Aurora Water at 303-739-7370.
Specific penalty amounts for this ordinance are not published in a publicly accessible fine schedule. Contact Aurora code enforcement directly for current fines, enforcement procedures, and hearing options.
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See how Aurora's stormwater management rules stack up against other locations.
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