How much does a splash pad add to a city's water bill?

Water cost is one of the most underappreciated parts of splash pad operations. A pass-through pad — where municipal tap water flows through the features once and discharges to a storm drain or sewer — uses tens of thousands of gallons per day at typical flow rates. Multiply that by a 100-day operating season and a typical municipal water rate, and a single pad can produce a $15,000 to $40,000 water bill, sometimes more in expensive water markets like the desert Southwest. Recirculating pads reuse the same treated water in a closed loop, with topoff for evaporation and splashout. Their seasonal water cost typically lands at $1,500 to $5,000, an order of magnitude lower. The tradeoff is that recirculation requires capital investment in pumps, filtration, and chemical treatment, plus ongoing chemical costs and energy for circulation. Most cities running pass-through pads in drought-prone regions are converting to recirculation as budgets allow, both to cut cost and to defend against water-restriction concerns from residents.