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What is the difference between a splash pad and a wading pool?
Quick answer
A wading pool is a shallow standing-water pool 6-18 inches deep. A splash pad has zero-depth water with no standing pool. Wading pools dominated US parks from the 1950s-1990s but have been largely replaced by splash pads due to lifeguard requirements and illness-outbreak risks.
Wading pools are the predecessors of splash pads. A typical municipal wading pool from the 1950s-1990s held standing water 6-18 inches deep, was finished in concrete or tile, and required certified lifeguards in most jurisdictions. They were popular but expensive to staff and prone to recreational-water-illness outbreaks. Starting in the early 2000s, US municipalities began replacing wading pools with splash pads — zero-depth water-play surfaces that don't trigger lifeguard staffing requirements and can use modern UV/ozone secondary disinfection. By 2020, most older wading pools had been demolished or converted. A few survive in older cities (Chicago Park District, NYC Parks). Older Americans still sometimes call splash pads 'wading pools' as a holdover term, but the designs are functionally and legally distinct.