Joliet hears NPDES stormwater update as Illinois EPA tightens MS4 reporting

Joliet — Dan Bounds of Baxter & Woodman told the City of Joliet’s pre-council meeting on March 2 that a new statewide MS4 (municipal separate storm sewer system) permit from the Illinois Environmental Protection Agency, effective Aug. 1, expands documentation and public-education requirements for municipalities.

Bounds said the permit stems from federal Clean Water Act obligations implemented by the IEPA and that Joliet already meets many requirements as an MS4 community. "The program has six major areas of requirements," he said, listing public education and involvement, illicit-discharge reduction, construction and post-construction oversight, and municipal good-housekeeping and pollution-prevention training for staff.

The presentation emphasized monitoring and regional collaboration: Joliet participates in the Lower Des Plaines River Watershed Group and the Lower DuPage River Watershed Coalition to assess program effectiveness. Bounds noted new permit duties include specific resident- and business-focused education, additional documentation of staff training, an inventory of every city-owned facility and new quarterly inspection requirements for pollution-prevention measures.

A council member urged more in-person neighborhood outreach. "Public engagement and outreach is more than just a meeting that's televised," the council member said, suggesting the city take the program into neighborhoods. City staff acknowledged watershed groups do outreach and said neighborhood meetings could be added to the stormwater program plan.

Bounds described common local water-quality impairments — low dissolved oxygen and elevated nutrients such as phosphorus — and explained how runoff from streets, parking lots and work sites can carry pollutants to streams and drinking-water sources. He pointed council members to the city’s stormwater website and Public Works as the local contact for the program (phone listed in the presentation as 815-724-4200).

Why it matters: The new MS4 permit increases the administrative and inspection burden on municipalities and tightens expectations for resident and business education. For Joliet, the changes largely require more reporting and routine inspections rather than new on-the-ground programs, but council members flagged outreach and neighborhood engagement as areas for follow-up.

What’s next: Staff said a new five-year stormwater management plan will be prepared to reflect the permit’s requirements and that the city will continue working through watershed groups and consider neighborhood meetings as part of its public-education strategy.