Stormwater Management: Evanston vs Schaumburg

When is a stormwater management plan required in Evanston?

Projects disturbing 5,000 square feet or more or increasing impervious surface by more than 2,500 square feet must provide a stormwater management plan prepared by a licensed engineer. The plan must comply with MWRD Watershed Management Ordinance standards.

Can I use rain gardens instead of detention basins?

Yes. Evanston encourages green infrastructure including rain gardens, bioswales, permeable pavers, and green roofs. These may satisfy part of the detention requirement. Contact Public Works for design criteria.

Does Evanston have combined sewer issues?

Yes. Portions of Evanston have combined sewer systems. The city encourages downspout disconnection and green infrastructure to reduce stormwater inflow to combined sewers and minimize basement flooding during heavy rain events.

Do I need a stormwater plan for my home project in Schaumburg?

Small residential projects like patios and driveways generally do not require a formal stormwater plan unless the total new impervious area exceeds Cook County WMO thresholds. However, you must not alter drainage patterns in ways that flood neighboring properties.

Why does Schaumburg have strict stormwater rules?

Schaumburg is in the Salt Creek watershed, which has a history of significant flooding events. The Village's stormwater regulations help reduce flood risk by controlling runoff from new development and encouraging green infrastructure.

What are best management practices I can use at home?

Rain gardens, rain barrels, permeable pavers, and downspout disconnection all help manage stormwater on residential properties. These practices reduce runoff to Salt Creek and can help prevent localized flooding during heavy rain events.