Unregulated Contaminant Monitoring Rule – Round 4 (UCMR4) Results


​The Unregulated Contaminant Monitoring Rule (UMCR) requires water providers nationwide to sample for unregulated contaminants once every five years.  The EPA uses these sampling efforts to collect information about contaminants suspected to be present in drinking water but which are currently not regulated by health based limits under the Federal Safe Drinking Water Act.  The UCMR4 – fourth round of UMCR, requires monitoring for 30 chemical contaminants including cyanotoxins, metals, pesticides, brominated haloacetic acid (HAA) disinfection groups, alcohols, and semivolatile organic chemicals. More information about the UMCR is available from the Safe Drinking Water Hotline at 1-800-426-4791.

 The City of Salem began Unregulated Contaminant Monitoring Rule – Round 4 (UCMR4) sampling in July 2018.  The City completed biweekly sampling for cyanotoxins from July through October 2018.  All other samples were collected quarterly in July 2018, October 2018, January 2019, and April 2019, which completed UCMR4 sampling.

Click here to download a pdf of the UCMR4 results.

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