Standards for Filtration

Section 611 Section 611.741  Standards for Filtration A PWS supplier must apply filtration treatment complying with Subpart B and this Subpart R. BOARD NOTE:  This Section originally derived from 40 CFR 141.171.  The Board removed provisions for unfiltered system suppliers.  A supplier in Illinois using a surface water source or groundwater under the direct influence of surface water must apply filtration treatment and disinfection to water it provides to the public.