Typical Classification of Drinking Water Systems Serving 250-3,000 People Water Source Treatment Technology Used Groundwater Surface Water Disinfection only Class I --- Iron removal Class I or II --- Ion exchange softening Class I or II --- Conventional surface water treatment --- Class II or III Precipitation softening Class I or II Class II or III These are substances believed to be harmful over a long period, McMahon said.
(softening Class I or II Class II or III; to be; harmful over a long period) (Typical Classification of Drinking Water Systems; Serving; 250-3) (These are substances; said; McMahon) Context(These are substances said,List([352, 428))):(These; are; softening Class I or II Class II or III These are substances believed to be harmful over a long period) (Ion exchange; softening; Class I or II)
These are substances said,List([352, 428))
softening Class I or II Class II or III Typical Classification of Drinking Water Systems These are substances These Ion exchange
to be Serving said are softening
harmful over a long period
250-3
McMahon
softening Class I or II Class II or III These are substances believed to be harmful over a long period
Class I or II