OAR 333-062-0165
Spa Water Quality


Water in public spa pools shall be maintained with water quality parameters within limits set out in Table 1. [Table not included. See ED. NOTE.]


Testing Equipment:


All public swimming pools shall have functional test kit(s) or equipment for measuring the pH, free and combined chlorine concentration, or bromine, (or concentration of other approved disinfectant), total alkalinity, turbidity (water clarity) and cyanuric acid if stabilized chlorine is used;


Functional test kits or testing systems shall be provided to test for total copper and silver concentrations when they are used as supplemental disinfectants;


Test kits for measuring free chlorine or bromine shall use DPD as the reagent.


Pool operators shall test and record the parameters described in section (1) of this rule with the following minimum frequencies during periods when the pool is open for use:


pH — Every two hours;


Chlorine (Non-stabilized) — Hourly; chlorine (stabilized) — Every two hours; continuous reading devices shall satisfy requirements of subsections (3)(a) and (b) of this rule if such devices record in pH units and ppm of free chlorine;


Bromine — hourly; continuous reading devices shall record in units of ppm bromine;


Total alkalinity — Daily;


Total copper — Weekly, if used;


Total silver:


If ionizing technology is used, once per quarter for one year after equipment is installed; twice per year thereafter;


Weekly if silver is dispensed without using ionizing technology.


Turbidity — Daily;


Cyanuric acid — Weekly (when using stabilized chlorine);


Calcium hardness — Weekly (recommended).


Spa pools shall be drained and refilled with fresh water at least once every 30 days.


Spa pool water shall be oxidized or superchlorinated as needed when combined chlorine exceeds spa water quality parameters, Table 1. [Table not included. See ED. NOTE.]


Notwithstanding the above, the Division may require any other testing frequency for a spa water parameter or a chemical added to the spa for the purpose of protecting public health.
[ED. NOTE: Tables referenced are available from the agency.]
Last Updated

Jun. 8, 2021

Rule 333-062-0165’s source at or​.us