Is splash pad water treated?

Public splash pads use one of two main systems, and both involve treated water. Flow-through pads draw water directly from the city's potable water supply, send it through the features once, then drain to sewer or storm — that water is treated to drinking-water standards before it ever leaves the city's main. Recirculating pads collect used water in a holding tank, run it through filters, dose chlorine to maintain residual (1-3 ppm), and sometimes add UV or ozone secondary disinfection to kill chlorine-resistant pathogens like Crypto. State health codes regulate testing frequency, often requiring multiple chlorine and pH checks per day. Untreated raw-water splash pads using stream or well water do exist in a few rural parks but are rare and usually clearly marked. Indoor pads are almost always treated more aggressively than outdoor ones.