Read the occurrence data support documents for Regulatory Determination 2:
You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.- The Analysis of Occurrence Data from the First Unregulated Contaminant Monitoring Regulation (UCMR 1) in Support of Regulatory Determinations for the Second Drinking Water Contaminant Candidate List (PDF)(278 pp, 16 MB)
- The Analysis of Occurrence Data from the Unregulated Contaminant Monitoring (UCM) Program and National Inorganics and Radionuclides Survey (NIRS) in Support of Regulatory Determinations for the Second Drinking Water Contaminant Candidate List (PDF)(120 pp, 4 MB)