maintenancewater-qualityhygienecommercial
How often should splash pad water be tested?
Quick answer
Most state codes require chlorine and pH tested every 2-4 hours during operation, alkalinity weekly, and bacteria (heterotrophic plate count, E. coli) monthly via accredited lab. Recirc systems also test ORP continuously. Log all readings and retain for 1-3 years per state law.
Water-quality testing frequency is dictated by state pool code and the system type. Flow-through systems require chlorine and pH testing every 2-4 hours during operation, since fresh water flows continuously. Recirculating systems require the same plus continuous ORP (oxidation-reduction potential) monitoring through an inline sensor that triggers automatic chemical adjustment. Total alkalinity, calcium hardness, and cyanuric acid are tested weekly. Bacterial testing — heterotrophic plate count and E. coli or total coliform — is sent monthly to an accredited environmental lab. Some states also require annual cryptosporidium or giardia indicator testing. All readings go into a bound logbook or state-approved electronic record. Logs must be retained 1-3 years and presented on demand to health inspectors. Failure to log is itself a citable violation, even if water quality is fine.