EPA published a Notice of Data Availability (NODA). The NODA included information that had become available since the 1991 proposed revisions to the 1976 Radionuclides Rule. The Agency also developed a technical support document to accompany the NODA. This document provides background information and further describes the analyses discussed in the NODA.

• National Primary Drinking Water Regulations; Radionuclides; Notice of Data Availability; Proposed Rule (PDF)(2 pp, 184 K, About PDF)

• Radionuclides Notice of Data Availability Technical Support Document (PDF)(164 pp, 517 K)
  Radionuclides Notice of Data Availability Technical Support Document, March 2000
• Preliminary Health Risk Reduction and Cost Analysis (PDF)(183 pp, 760 K)
  Preliminary Health Risk Reduction and cost analysis. Revised National