Recently Adopted Drinking Water Regulations

Last Update: November 7, 2008

Listed below are recently adopted drinking water regulations:

• Revision of the Arsenic MCL (DPH-04-017) -- effective November 28, 2008.
• WaterWorks Standards (R-14-03) - effective March 9, 2008.
• Interim Enhanced Surface Water Treatment Rule (R-20-01) (PDF) -- effective January 12, 2008.  [Final Statement of Reasons (PDF)]

Regulations effective in 2007

• Primary Maximum Contaminant Level for Perchlorate (R-16-04) (PDF)-- effective October 18, 2007. 
  There's more about its implementation and the scheduling of monitoring at the Drinking Water Program's perchlorate webpage.

Regulations effective in 2006

• Secondary Maximum Contaminant Levels (R-21-03) (PDF) -- effective September 27, 2006.
• Public Notification Requirements for Drinking Water Violations (R-59-01) (PDF)-- effective September 1, 2006.

See all regulations in the Drinking Water Law Book.