35 Ill. Adm. Code 604.730
Continuous Chlorine Analyzers
Section 604.730 Continuous Chlorine Analyzers
Community water supplies that rely on chlorination for
disinfection under Section 604.700(a) must have continuous chlorine residual
analyzers with alarm capability that alerts the community water supply if
chlorine residuals at the entry point to the distribution system are below the
limits established in Section 604.725.