The United States Environmental Protection Agency?s (USEPA) Office of Ground Water and Drinking Water (OGWDW) collects national occurrence data on contaminants in drinking water using Unregulated Contaminant Monitoring Regulations (UCMR).
The contaminants, which are potential candidates for future regulation, may be selected from the Contaminant Candidate List (CCL), or may be emerging contaminants, with the potential for inclusion on future CCLs.
In order for a contaminant to be included in the UCMR, a standardized analytical method for its measurement in...
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