Community water systems are not federally required to include information in CCRs about detected contaminants that only have a secondary standard. However, if a community water system chooses to report on secondary contaminants, or if the state requires this reporting, it should be done in a separate table from the table displaying results for contaminants with national primary drinking water standards (Preparing Your Drinking Water Consumer Confidence Report Revised Guidance for Water Suppliers, EPA816-R-05-002, April 2005).
40 CFR 141.153(d) specifies the information on detected regulated contaminants that community water systems must include in consumer confidence reports (CCRs). Do community water systems need to report information on detected contaminants that have a seco
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