Group I Treatment. A facility which provides disinfection treatment using a sodium hypochlorite or calcium hypochlorite solution as the disinfectant.
Group II Treatment. A facility which provides disinfection treatment using gaseous chlorine or chloramine disinfection or includes sequestering, fluoridation, or corrosion control treatment.
Group III Treatment. A facility treating a groundwater source which is not under the direct influence of surface water, utilizing aeration, coagulation, sedimentation, lime softening, filtration, chlorine dioxide, ozone, ultra-violet light disinfection, powdered activated carbon addition, granular activated carbon filtration or ion exchange, or membrane technology or that includes sludge storage or a sludge dewatering process.
Group IV Treatment. A facility treating a surface water source or a groundwater source which is under the direct influence of surface water, utilizing aeration, coagulation, clarification with a minimum detention time of two hours in the clarification unit, lime softening, rapid rate gravity filtration (up to four gallons per minute per square foot), slow sand filtration, chlorine dioxide, powdered activated carbon addition, or granular activated carbon filtration or ion exchange or that includes sludge storage or a sludge dewatering process. This classification also includes any treatment facility which does not provide filtration for a surface water source or a groundwater source which is under the direct influence of surface water.
Group V Treatment. A facility treating a surface water source or a groundwater source which is under the direct influence of surface water, utilizing high rate gravity filtration (greater than four gallons per minute per square foot), clarification with a detention time of less than two hours in the clarification unit, diatomaceous earth filtration, or ultraviolet light disinfection.
Group VI Treatment. A facility treating a surface water source or a groundwater source which is under the direct influence of surface water, utilizing direct filtration, membrane technology, or ozone.
Group VII Treatment. Drinking water dispensing stations and vending machines which utilize water from an approved public water system or bottled water plants which treat water from the distribution system of a public water system or from a groundwater source which is not under the direct influence of surface water.
Group I Distribution. Distribution systems associated with state and transient noncommunity water systems.
Group II Distribution. Distribution systems associated with community and nontransient noncommunity public water systems which have a reliable production capacity not greater than six hundred thousand gallons a day and which do not provide fire protection.
Group III Distribution. Distribution systems associated with community and nontransient noncommunity water systems which have a reliable production capacity greater than six hundred thousand gallons a day but not greater than six million gallons a day (MGD) or have a reliable production capacity not greater than six hundred thousand gallons a day and provide fire protection.
Group IV Distribution. Distribution systems associated with community and nontransient noncommunity water systems which have a reliable production capacity than six MGD, but not greater than twenty MGD.
Group V Distribution. Distribution systems associated with community and nontransient noncommunity water systems which have a reliable production capacity greater than twenty MGD.
S.C. Code § 44-55-40