Frequent Questions

Where can I find guidelines for reporting under the Unregulated Contaminant Monitoring Rule?

Reporting for the third Unregulated Contaminant Monitoring Rule (UCMR 3) will be similar to the reporting under the second Unregulated Contaminant Monitoring Rule (UCMR 2). Laboratories responsible for sample analysis under UCMR 3 will post data to EPA’s web-based Safe Drinking Water Accession and Review System (SDWARS). Public water systems (PWSs) will then review and act upon data using SDWARS. Users access SDWARS through the Central Data Exchange (CDX), EPA's electronic reporting system.

PWSs that are subject to UCMR are also subject to the Consumer Confidence Report (CCR) Rule and the Public Notification (PN) Rule. The CCR rule requires that community water systems (CWS) report monitoring results when unregulated contaminants are detected (40 CFR 141.151). The PN rule requires that water systems notify the public that the results are available (40 CFR 141.207). Please refer to the CCR rule and the PN rule for further information.

More information can be found at this webpage:

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