Stormwater Management: Chicago vs Tinley Park
How do stormwater management rules compare between Chicago, IL and Tinley Park, IL?
Tinley Park has fewer restrictions than Chicago.
Chicago, IL
Cook County
Chicago's Stormwater Management Ordinance (MCC 11-18) requires regulated developments to capture and manage stormwater runoff, including capturing the first half-inch from impervious surfaces. The 2024 Stormwater Manual provides detailed BMP guidelines.
View full Chicago rules →Tinley Park, IL
Cook County
Tinley Park is subject to the Metropolitan Water Reclamation District of Greater Chicago (MWRD) Watershed Management Ordinance (WMO), which regulates stormwater detention, volume control, floodplain, and wetland impacts. Development disturbing 0.5 acres or creating significant impervious surface triggers WMO permit review. The Village enforces local stormwater standards and illicit discharge prohibitions.
View full Tinley Park rules →Key Facts Comparison
| Fact | Chicago | Tinley Park |
|---|---|---|
| Code Section | MCC 11-18 | - |
| Volume Capture | First 0.5 inch from impervious surfaces | - |
| Alternative | 15% impervious surface reduction | - |
| Authority | Dept. of Water Management | - |
| Manual | 2024 Stormwater Management Ordinance Manual | - |
| Governing Rule | - | MWRD WMO |
| Trigger | - | 0.5 ac disturbance |
| Release Rate | - | 0.15 cfs/ac (100-yr) |
| Volume Control | - | First 1 inch captured |
| Illicit Discharge | - | Prohibited |
Highlighted rows indicate differences between cities.
Chicago FAQ
What triggers stormwater management requirements in Chicago?
Regulated developments as defined in MCC 11-18 must submit a stormwater management plan. This generally applies to new construction and significant redevelopment projects that increase impervious surface area.
What BMPs does Chicago accept for stormwater management?
Approved BMPs include green roofs, rain gardens, permeable pavement, bioswales, cisterns, rain barrels, and native landscaping. The 2024 Stormwater Manual provides detailed design guidance.
Tinley Park FAQ
Who regulates stormwater in Tinley Park?
The MWRD Watershed Management Ordinance governs stormwater countywide, implemented locally by Tinley Park. Development over 0.5 acres or with significant impervious surface triggers WMO permits.
Do small home projects trigger stormwater review?
Typical home improvements like patios and small additions are usually below the WMO trigger, but cumulative impervious area increases may matter. Community Development reviews at permit application.
Can I wash my car in the driveway?
Occasional residential car washing is generally acceptable, but soapy water should not be directed into storm drains that flow to Tinley Creek. Commercial or fleet washing on residential property is prohibited.
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