Oregon Drinking Water Regulations

• Drinking Water Rules
  Oregon's Drinking Water Quality Act and Administrative Rules for Public Water Systems serve to ensure safe drinking water for Oregonians.

Rule Implementation Guidance

• Groundwater Rule
  The Groundwater Rule (GWR) applies to all public water systems that use groundwater sources or purchase groundwater. The primary purpose of the rule is to protect public health from bacterial and viral pathogens in public groundwater systems.
• Stage 2 Disinfection Byproducts Rule
  The Stage 2 Disinfection Byproducts Rule (DBPR) applies to all community and non-transient non-community water systems that add a primary or residual disinfectant other than ultraviolet light (UV), or deliver water that has been treated with a primary or residual disinfectant other than UV. Systems that purchase disinfected water are included in this rule. The Stage 2 DBPR builds on the existing Stage 1 rule and provides increased health protection.
• Long Term 2 Enhanced Surface Water Treatment Rule (LT2)
  The Long Term 2 Enhanced Surface Water Treatment Rule (LT2) rule applies to all public water systems that use surface water or groundwater under the direct influence of surface water (GWUDI). The purpose of the rule is to ensure adequate treatment of surface water sources with higher levels of Cryptosporidium and to address uncovered finished water reservoirs.