1. (1) The operator shall ensure that:

   1. (a) a geothermal pool or geothermal bathing place that transports source, pool, or discharge water through pipes meets the requirements of Section R392-302-19 for piping, pipe labeling, velocity in pipes, adequate space in equipment areas, valves, and air induction systems;
   2. (b) a geothermal pool or geothermal bathing place meets the requirements of Section R392-302-19 for normal water level and vacuum cleaning systems except a vacuum cleaning system is not required if an operator keeps the pool clean by draining the pool and cleaning it while it is empty; and
   3. (c) a geothermal pool or geothermal bathing place maintains flow-through 24 hours a day during the operating season, except for periods of maintenance.
2. (2) If the geothermal pool or geothermal bathing place is drained and cleaned each day prior to use, flow-through is only required during the period that the geothermal pool or geothermal bathing place is in use.

3. (3) The operator shall ensure that:

   1. (a) a geothermal pool or geothermal bathing place with a volume greater than 3,000 gallons has a flow-through rate greater than or equal to 1/4 the pool volume every hour;
   2. (b) a geothermal pool or geothermal bathing place with a volume less than or equal to 3,000 gallons has a flow-through rate greater than or equal to the complete pool volume every 30 minutes;

   3. (c) a geothermal pool or geothermal bathing place has a method to determine the accurate rate of flow in gallons per minute;

      1. (i) if the rate of flow method is a rate of flow indicator manufactured by a third party, it is properly installed and located according to the manufacturer's recommendations; or
      2. (ii) if a field-fabricated rate of flow indicator such as a calibrated weir or flume is used, it is designed and calibrated under the direction of a licensed professional engineer; and
   4. (d) the rate of flow indicator is located and positioned in a place where it can be easily read by the operator as required in Subsection R392-302-19(1)(h).
4. (4) If the operator of a geothermal pool or geothermal bathing place maintains the disinfectant levels, chloramine levels, and pH levels within the values allowed in Table 3 of Rule R392-302 and operates a recirculation system in the pool in compliance with the requirements of Section R392-302-19, the pool is exempt from the flow-through rate requirements of Subsection R392-303-19(1).

5. (5) The local health officer may:

   1. (a) approve a reduced flow rate if the operator can demonstrate that the required bacteriological level can be maintained at the reduced flow rate; or
   2. (b) exempt a geothermal pool or geothermal bathing place from the requirement for a rate of flow indicator if the rate of flow is not adjustable or if there is no practical way to measure flow.
6. (6) If the operator of a geothermal bathing place is unable to control the flow-through rate, the operator may meet the bacteriologic water quality standards in Section R392-303-26 by controlling bather load.
7. (7) Except the operator shall maintain a flow-through with a maximum turnover time of 48 hours and shall meet the bacteriological requirements of Subsection R392-302-25(8).

KEY: geothermal pools, geothermal natural bathing places, hot springs, geothermal spas

Date of Last Change: November 8, 2023

Notice of Continuation: January 22, 2024

Authorizing, and Implemented or Interpreted Law: 26B-1-202; 26B-7-402