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Monitoring Unregulated Drinking Water Contaminants
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Fact Sheets about the Fourth Unregulated Contaminant Monitoring Rule (UCMR 4)

These fact sheets provide background information and contaminant list information about the fourth Unregulated Contaminant Monitoring Rule (UCMR 4).

  • UCMR 4 Basic Information Fact Sheet (pdf) (December 2016, 815-F-16-007)
    General background information for UCMR 4.
  • UCMR 4 Fact Sheet for Assessment Monitoring - Cyanotoxins (pdf) (December 2016, 815-F-16-008)
  • UCMR 4 Fact Sheet for Assessment Monitoring - Haloacetic Acid (HAA) (pdf) (December 2016, 815-F-16-006)
  • UCMR 4 Fact Sheet for Assessment Monitoring - Additional Contaminants (pdf) (December 2016, 815-F-16-009)
  • Monitoring Unregulated Drinking Water Contaminants Home
  • About the Unregulated Contaminant Monitoring Rule (UCMR)
  • Meetings & Materials
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  • Occurrence Data
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  • UCMR 5
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on October 4, 2021
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