FR Notices discuss MCLGs and MCLs for the chemical contaminant rules. They include monitoring, reporting and public notification requirements. They also specify best available technology (BAT) for use with a variance or exemption.

• Arsenic Rule: National Primary Drinking Water Regulations; Arsenic and Clarifications to Compliance and New Source Contaminants (Final Rule) (PDF)(91 pp, 961 K, About PDF) 66 FR 6976-706, January 22, 2001

• Phase I: National Primary Drinking Water Regulations; Synthetic Organic Chemicals; Monitoring for Unregulated Contaminants (Final Rule) (PDF)(27 pp, 13 MB, July 8, 1987, 52-FR-25690)
  Drinking Water Regulations: Federal Register Notice, July 8, 1987
• Phase II: National Primary Drinking Water Regulations - Synthetic Organic Chemicals and Inorganic Chemicals; Monitoring for Unregulated Contaminants; National Primary Drinking Water Regulations Implementation; National Secondary Drinking Water Regulatio (PDF)(73 pp, 12 MB, January 30, 1991, 56 FR 3526 – 3597)
  Drinking Water Regulations: Federal Register Notice, January 30, 1991
• Phase IIB: Drinking Water; National Primary Drinking Water Regulations; Monitoring for Volatile Organic Chemicals; MCLGs and MCLs for Aldicarb, Aldicarb Sulfoxide, Aldicarb Sulfone, Pentachlorophenol, and Barium (Final Rule) (PDF)(16 pp, 8 MB, July 1, 1991, 56 FR 30266 – 30281)
  Drinking Water Regulations: Federal Register Monday July 1, 1991
• Phase V: Drinking Water; National Primary Drinking Water Regulations- Synthetic Organic Chemicals and Inorganic Chemicals; National Primary Drinking Water Regulations Implementation (Final Rule) (PDF)(75 pp, 26 MB, July 17, 1992, 57 FR 31776 – 31849)
  Drinking Water Regulations: Federal Register Notice, July 17, 1992