Oak Park, IL Landscaping Rules: Rainwater Harvesting (2026)

The Village of Oak Park permits and actively encourages rainwater harvesting as part of its stormwater management and sustainability initiatives. Illinois state law expressly allows the collection of rainwater for non-potable uses such as lawn and garden irrigation. The Village has participated in rain barrel distribution programs, often offering discounted or free rain barrels to residents through partnerships with environmental organizations. Rain barrels and small cisterns may be placed on residential property without a permit, though large cistern installations (typically over 500 gallons) may require review for structural and drainage considerations. Rain barrels should be placed on a stable, level surface and connected to downspouts to capture roof runoff. Water from rain barrels should not be used for drinking or food preparation. Standing water must be managed to prevent mosquito breeding, so barrels should have screened openings and be drained periodically. The Village encourages combining rain barrels with other green infrastructure such as rain gardens, permeable pavers, and native plantings to manage stormwater on residential properties.