Environmental Rules in Tinley Park, IL: What Residents Actually Need to Know

If you live in Tinley Park or are thinking about moving there, environmental rules are one of those things you probably won't think about until they affect you directly. Tinley Park has 4 specific rules on the books covering different aspects of environmental rules, and some of them might surprise you.

Stormwater Management

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.

Key details: 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.

Unpermitted development triggering WMO review results in stop-work orders, mandatory detention/volume control retrofits, and fines. Illicit discharges into the storm sewer system violate the Village's MS4 permit and may result in fines from $75 to $750 per day and EPA enforcement. Code Enforcement: (708) 444-5100.

Grading & Drainage

Tinley Park regulates grading and drainage on residential properties to prevent water from being directed onto neighboring lots or creating flooding. Minor grade changes typically do not require a permit, but substantial grading requires a permit and must not alter established drainage patterns. Sump pump and downspout discharge must be directed to lawns or storm sewer, not onto neighbors or sanitary sewer.

Key details: Permit: Large grading yes. Drainage Pattern: Preserve established. Sump Discharge: Lawn or storm sewer. Sanitary Sewer: Discharge prohibited. Downspouts: Splash to lawn.

Grading or drainage changes causing neighbor flooding can result in code enforcement and private civil nuisance claims. Sump pump discharge to the sanitary sewer violates MWRD rules. Code Enforcement: (708) 444-5100. Neighbor disputes may also be brought in Cook or Will County courts.

Erosion Control

Tinley Park requires erosion and sediment control measures on construction sites disturbing soil under MWRD Watershed Management Ordinance standards. Silt fence, inlet protection, construction entrance stabilization, and permanent stabilization within 14 days of final grading are typical requirements. Projects disturbing 1 acre or more require Illinois EPA NPDES Construction General Permit coverage.

Key details: Silt Fence: Perimeter required. Inlet Protection: All nearby drains. NPDES Permit: 1+ acre disturbance. Stabilization: Within 14 days. Inspections: Weekly + after rains.

Inadequate erosion control may result in stop-work orders, civil fines, and mandatory cleanup of sediment deposited off-site or in storm drains. NPDES violations can result in federal and state enforcement with significant penalties. Code Enforcement: (708) 444-5100.

Flood Zones

Tinley Park participates in the National Flood Insurance Program and enforces floodplain development regulations for areas mapped as Special Flood Hazard Areas on FEMA Flood Insurance Rate Maps. Tinley Creek and its tributaries include mapped flood zones. New construction in the floodplain must meet elevation, floodproofing, and compensatory storage requirements. A floodplain development permit is required for any construction in the SFHA.

Key details: NFIP Participant: Yes. Freeboard: 1 ft above BFE. Floodway Fill: Prohibited. Compensatory Storage: 0-for-0 in fringe. Substantial Improvement: 50% value trigger.

Unpermitted floodplain development typically results in a stop-work order, required removal or elevation of the structure, and potential loss of NFIP eligibility for the community. Substantial damage / substantial improvement triggers must be evaluated. Code Enforcement: (708) 444-5100.

This is not one of those rules that cities tend to ignore. Tinley Park actively enforces its flood zones requirements.

The Bottom Line

Tinley Park's environmental rules rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Tinley Park is broadly strict or permissive.

Keep in mind that Tinley Park can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.