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The Pennsylvania Code website reflects the Pennsylvania Code changes effective through 52 Pa.B. 4384 (July 30, 2022).

28 Pa. Code § 18.29. Disinfection of pool water.

§ 18.29. Disinfection of pool water.

 (a)  When chlorine or a hypochlorite compound is used for disinfection, the free chlorine residual in the water in all parts of the pool when in use shall be at least 0.4 milligram per liter and the pH value of the water shall be at least 7.2 and not more than 8.2.

 (b)  Other disinfecting materials or methods may be used after approval by the Department when they have been adequately demonstrated to:

   (1)  Provide a satisfactory residual effect which is easily measured.

   (2)  Work as effectively as the chlorine concentrations required by subsection (a).

   (3)  Create no danger to public health, create no objectionable physiological effects, or impart no toxic properties to the water.

 (c)  Testing kits shall be provided for making the necessary tests for residual disinfection and pH. The kit for disinfectant residual shall be accurate within 0.1 milligram per liter of chlorine or equivalent. The pH kit shall be accurate within 0.2 pH units. When the pool is in use tests shall be made at least twice daily or more often if required by the Department.


   The provisions of this §  18.29 adopted September 18, 1971, effective September 18, 1971, 1 Pa.B. 1921.

Cross References

   This section cited in 28 Pa. Code §  18.23 (relating to recirculation and filtration).

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