3701-31-04(D)(6)(a)(2) / Pool free chlorine disinfectant residual shall be above 1 ppm.
Critical Pool free chlorine disinfectant residual was below 1 ppm. -Observed free chlorine at .6 ppm and Combined chlorine at .2 for a total of .8 chlorine.
Do not operate the pool until the chlorine disinfectant residual is at 1 ppm or above. -Recommended to close pool until chlorine disinfectant residual is at lease 1.0 ppm.