Groundwater Rule Information

This rule applies to all public water systems that use groundwater sources or purchase groundwater, and takes effect December 1, 2009. The primary purpose of the rule is to protect public health from bacterial and viral pathogens in public groundwater systems. E.coli will be used as the indicator of fecal contamination.

Overview of the Groundwater Rule: Please see "Getting Ready for the Groundwater Rule" in Winter 2009, DWP Pipeline newsletter, page 4 (pdf)

Links to Other Groundwater Rule Information: 

• Disinfection Verification Form for Groundwater Systems (pdf)
• Groundwater Rule Notification for Systems that Chlorinate (pdf)
• EPA Quick Reference Guide (pdf) 
• EPA GWR Compliance Help Web Page
• DWP Pipeline Articles: 
  
  
  • "Updates to the Coliform Sampling Plan Template for Small Systems" (Summer 2009, page 7) (pdf)
    
    
• Coliform Sampling Plan Template for Small Public Water Systems Serving Up to 1,000 Persons (Word fill-in) (pdf)
• Compliance Monitoring Reporting Form: Chlorine Residual Monitoring at the Entry Point (Word fill-in) (pdf)

For more information about the Groundwater Rule, please contact the Drinking Water Program at: ph. (971) 673-0405 (M-F, 8AM - 5PM).