St. Clair County has no rainwater ordinance. Illinois' Rainwater Capture Act allows capturing and reusing rainwater for non-potable uses statewide. Systems must follow the Illinois Plumbing Code, and larger systems (over 5,000 gallons) need plan approval before installation.
The county sets no rule on rain barrels or cisterns, so Illinois law governs. The Rainwater Capture Act (Public Act 97-0220, 415 ILCS 15) confirms residents, businesses and municipalities may capture, store and reuse rainwater for non-potable purposes. Collection and distribution systems must be constructed in accordance with the Illinois Plumbing Code by a licensed plumber based on the end use. When a system's collection and storage capacity exceeds 5,000 gallons, plans and specifications must be submitted for approval before installation. Simple residential rain barrels for garden watering fall well under this threshold and need no permit.
No county penalty. Non-compliant large systems can face state plumbing-code enforcement; using harvested rainwater for potable purposes is prohibited.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
St. Clair County, IL
St. Clair County parks and preserves are dawn-to-dusk. Silver Creek Preserve is open all year, seven days a week, from dawn to dusk. Overnight use and after-...
St. Clair County, IL
The county's only light-trespass standard applies inside the Airport Overlay District, where fixtures must not cause excessive glare or light trespass; singl...
St. Clair County, IL
St. Clair County has no county-wide dark-sky ordinance for ordinary homes. Full-shielding, downward-facing lighting standards apply only inside the Airport O...
St. Clair County, IL
The Zoning Ordinance has no garage-sale sign category; such signs would be temporary signs (max 48 sq ft, 30-day display) and cannot sit within 10 feet of a ...
St. Clair County, IL
The county Zoning Ordinance has no separate political-sign category. Campaign signs fall under temporary signs, limited to 48 sq ft, and a temporary sign can...
St. Clair County, IL
St. Clair County has no tiny-home ordinance. A permanent tiny house is a dwelling that must meet minimum-lot standards, the adopted building code and dwellin...
See how St. Clair County's rainwater harvesting rules stack up against other locations.
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