National Primary Drinking Water Regulations NPDWRs

A National Primary Drinking Water Regulation (NPDWR or primary standard) is a legally-enforceable standard that applies to public water systems. Primary standards protect drinking water quality by limiting the levels of specific contaminants that can adversely affect public health and are known or anticipated to occur in water. They take the form of Maximum Contaminant Levels (MCL) or Treatment Techniques (TT). 

SWDA requires the EPA to promulgate National Primary Drinking Water Regulations (NPDWRs), which specify enforceable maximmn contaminant levels (MCLs) or treatment techniques for drinking water contaminants. An MCL is established at a level that is as close to the MCLG as is technically and economically feasible. A treatment technique m be set instead of an MCL if the available analytical methods... 

NPDWR National Primary Drinking Water Regulations... 

NPDWR National primary drinking water regulation... 

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