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What runoff compliance rules apply to splash pads?
Quick answer
Splash pad runoff is regulated under state stormwater rules and the federal Clean Water Act. Operators must contain all chlorinated water on-site, route to sanitary sewer or recirc, and prevent runoff from reaching natural waterways. Annual NPDES self-certification or full permit may be required for large pads.
Splash pad runoff falls under multiple regulatory layers. The federal Clean Water Act prohibits discharge of pollutants — including chlorine and other treatment chemicals — to waters of the US without an NPDES permit. State stormwater rules add local requirements, often stricter than federal. Operational requirements: all pad water must be contained on-site within the recirc loop or routed to sanitary sewer; surface drainage must not flow onto adjacent streets, parking lots, or storm-drain inlets; pre-treatment with dechlorination may be required before sewer discharge. Large pads (over a permit threshold, typically 10,000+ gallons per day) need a full NPDES permit. Smaller pads may self-certify annually. Compliance documentation includes a written stormwater pollution prevention plan, monthly inspection logs, and chemical-use records. Inspections by state EPA or environmental agencies happen unannounced.