Unregulated Contaminant Monitoring
Rule (UCMR) 1999
 UCMR Data Available
(You can also link from "Access UCMR Data" under
"Important UCMR Links")
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EPA revised (September 17, 1999) the Unregulated Contaminant Monitoring Rule. EPA
uses the data generated by the new UCMR to evaluate and prioritize contaminants
on the Drinking Water Contaminant Candidate List, a list of contaminants
EPA is considering for possible new drinking water standards. These data
help to ensure that EPA has the high quality scientific data it needs
to make decisions about future drinking water standards. Click here to
read the rule in HTML or PDF.
On March 2, 2000, EPA published a rule [read in HTML or
PDF
] specifying the approved analytical methods for perchlorate and acetochlor.
On January 11, 2001, EPA published analytical methods [read in HTML or PDF] for Screening Survey
List 2 contaminants, and required monitoring for those contaminants
in drinking water. On September 4, 2001, EPA published an amendment [read
in PDF] to
UCMR List 2 concerning laboratory approval for Method 515.4. EPA also
delayed the requirement for electronic reporting of unregulated contaminant
monitoring results.
On October 29, 2002, EPA published a rule [read in
PDF] to approve EPA Method 1605
to monitor the Screening Survey List 2 microbiological
contaminant Aeromonas. The rule also specifies that laboratories
wishing to be approved for this method must participate in an Aeromonas
proficiency testing (PT) program conducted by EPA.
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