Stormwater Management: Arlington Heights vs Oak Park
How do stormwater management rules compare between Arlington Heights, IL and Oak Park, IL?
Oak Park has fewer restrictions than Arlington Heights.
Arlington Heights, IL
Cook County
Arlington Heights enforces comprehensive stormwater management regulations. Development and significant improvements must include stormwater detention or retention facilities. The Village participates in the MWRD stormwater management program and the Cook County Watershed Management Ordinance applies. Grading and drainage plans are required for new construction and major renovations.
View full Arlington Heights rules →Oak Park, IL
Cook County
Oak Park has comprehensive stormwater management regulations to address flooding concerns, particularly related to the Des Plaines River watershed and combined sewer system. Property owners must manage stormwater runoff from new construction and significant improvements. The village participates in the Metropolitan Water Reclamation District's stormwater management program.
View full Oak Park rules →Key Facts Comparison
| Fact | Arlington Heights | Oak Park |
|---|---|---|
| Detention Trigger | 2,500+ sq ft new impervious area | - |
| Design Storm | 100-year event | - |
| Watersheds | Salt Creek and Des Plaines River | - |
| MWRD Compliance | Required | - |
| Public Works Contact | (847) 368-5800 | - |
| Watershed | - | Des Plaines River |
| Sewer System | - | Combined (stormwater + sanitary) |
| Regional Authority | - | MWRD of Greater Chicago |
| Green Infrastructure | - | Rebates may be available |
| Disturbance Threshold | - | 0.5 acres triggers plan requirement |
Highlighted rows indicate differences between cities.
Arlington Heights FAQ
When is stormwater detention required in Arlington Heights?
Detention is required when a project adds more than 2,500 square feet of new impervious surface area. The detention volume must accommodate a 100-year storm event as calculated per MWRD and Cook County standards.
Can I redirect my downspouts onto my neighbor's property?
No. Downspouts must discharge onto your own property in a manner that does not cause drainage problems for neighbors. Discharging water onto adjacent properties may result in a nuisance complaint and enforcement action.
Does Arlington Heights allow rain gardens for stormwater management?
Yes. The Village encourages green infrastructure including rain gardens, permeable pavers, and bioswales as part of stormwater management plans. These can help meet detention requirements while providing environmental benefits.
Oak Park FAQ
Why does Oak Park have stormwater management requirements?
Oak Park is in the Des Plaines River watershed with a combined sewer system prone to overload during heavy rain. Stormwater management reduces flooding risk and sewer backups that have historically affected the village.
Are there rebates for rain barrels or rain gardens?
Yes, the MWRD Green Infrastructure Program may offer rebates for residential stormwater management improvements like rain barrels, downspout disconnection, and rain gardens. Contact the village or MWRD for current program availability.
Where should my sump pump discharge?
Sump pump discharge should be directed to your yard or an appropriate drainage area, not onto neighboring properties or directly into the sanitary sewer. The village can provide guidance on proper discharge locations.
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