Public water systems that use a surface water source or groundwater under the direct influence of surface water and that provide filtration shall meet the requirements of s. NR 811.860.
Wis. Admin. Code Department of Natural Resources § NR 810.295
Public water systems that use a surface water source or groundwater under the direct influence of surface water and that provide filtration shall meet the requirements of s. NR 811.860.
Wis. Admin. Code Department of Natural Resources § NR 810.295