When chlorine is used, a minimum free available chlorine residual of not less than one (1) part per million (ppm) with a maximum of five (5) parts per million (ppm) must be maintained whenever a pool is in use.
Idaho Admin. Code r. 16.02.14.221
When chlorine is used, a minimum free available chlorine residual of not less than one (1) part per million (ppm) with a maximum of five (5) parts per million (ppm) must be maintained whenever a pool is in use.
Idaho Admin. Code r. 16.02.14.221