Landscaping Rules in St. Clair County, IL (2026)

2 rules for unincorporated St. Clair County, Illinois.

Verified from official government sources

Note: These county rules apply to unincorporated areas of St. Clair County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Weed Ordinances

St. Clair County Code Chapter 25 names specific weeds (ragweed, thistle, poison ivy, Johnson grass and others) and declares them a nuisance on unincorporated residential lots once over eight inches. Illinois' Noxious Weed Law adds a statewide duty to control listed noxious weeds.

Weeds are a nuisance over 8 inches in unincorporated St. Clair County

Some Restrictions

St. Clair County Code 25-1-1 (Definition of Weeds)

"Weeds" as used in this Code shall include, but not be limited to the following: Burdock, Ragweed (giant), Ragweed (Common), Thistle, Cocklebur, Jimson, Blue Vervain, Common Milk Weed, Wild Carrot, Poison Ivy, Wild Mustard ... and Johnson Grass and all other grass or noxious weeds.

Full ordinance details →Official source ↗

Composting

St. Clair County has no rule against backyard composting. Statewide, Illinois bans landscape waste (leaves, grass, brush) from sanitary landfills under 415 ILCS 5/22.22, which is why composting, mulching and yard-waste collection are used instead. Keep piles from becoming a nuisance.

Backyard composting allowed; landscape waste banned from landfills

Some Restrictions

415 ILCS 5/22.22(c) (Illinois Environmental Protection Act)

No owner or operator of a sanitary landfill shall accept landscape waste for final disposal.

Full ordinance details →Official source ↗

All St. Clair County ordinances

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