Erosion Control: Des Plaines vs Oak Park
How do erosion control rules compare between Des Plaines, IL and Oak Park, IL?
Des Plaines and Oak Park have similar restriction levels.
Des Plaines, IL
Cook County
Construction sites in Des Plaines disturbing 1/2 acre or more must implement erosion and sediment control measures under the MWRD Watershed Management Ordinance. Sites disturbing 1 acre or more must obtain Illinois EPA NPDES coverage under General Permit ILR10 with a Stormwater Pollution Prevention Plan.
View full Des Plaines rules →Oak Park, IL
Cook County
Oak Park requires erosion and sediment control measures during construction and land-disturbing activities. Contractors and property owners must prevent soil, sediment, and construction debris from entering streets, storm drains, and neighboring properties. The village enforces MWRD watershed standards and IEPA NPDES requirements.
View full Oak Park rules →Key Facts Comparison
| Fact | Des Plaines | Oak Park |
|---|---|---|
| BMP Threshold | 1/2 acre | - |
| NPDES Threshold | 1 acre | 1 acre of disturbance |
| Permit | IL EPA ILR10 | - |
| SWPPP | Required >1 acre | - |
| Trackout | Must be cleaned | - |
| Required | - | All construction and grading activities |
| Silt Fencing | - | Required around disturbed areas |
| Inlet Protection | - | Required for nearby storm drains |
| Regional Standard | - | MWRD Watershed Management Ordinance |
Highlighted rows indicate differences between cities.
Des Plaines FAQ
Do I need erosion control for a home addition?
Smaller projects below 1/2 acre disturbance still must manage soil and prevent sediment from leaving the site. Larger projects must implement formal erosion control plans approved by City Engineering.
When do I need an Illinois EPA permit?
Construction projects disturbing 1 acre or more of land must obtain NPDES coverage under General Permit ILR10 and prepare a Stormwater Pollution Prevention Plan.
What about sediment tracked onto the street?
Trackout from construction sites onto public streets is prohibited and must be cleaned promptly. Stabilized construction entrances are required to minimize trackout.
Oak Park FAQ
Do I need erosion control for a small home project?
Yes. Even projects smaller than one acre must implement basic measures like silt fencing and inlet protection. The village checks erosion controls during building inspections.
Who is responsible for erosion control on my construction project?
Both the property owner and the contractor share responsibility. The building permit holder is ultimately responsible for ensuring erosion controls are installed and maintained throughout the project.
When can erosion control measures be removed?
Erosion controls must remain in place until the site is fully stabilized with permanent vegetation or impervious surfaces. Premature removal can result in violations if sediment leaves the site.
Compare other topics
See how Des Plaines and Oak Park compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool