Village engineer: new MS4 rules require stormwater management plan due Aug. 1

May 14, 2026

The village engineer told the Midlothian Board the village must complete a Stormwater Management Plan under the updated NPDES/MS4 permit by Aug. 1 and prepare an outfall map and more frequent inspections to remain in compliance with IEPA requirements.

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The village engineer updated the Village of Midlothian Board on new MS4 stormwater requirements tied to the National Pollutant Discharge Elimination System and the Illinois EPA. He said the new statewide general permit increases inspection, monitoring and documentation expectations and requires a village-wide Stormwater Management Plan (SWMP).

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