A to Z
Data &
Forms &
News &
Licensing &
Rules &
Public Health
Operator Certification

Oregon Drinking Water Services (DWS) administers the certification program for drinking water system operators. All community and non-transient non-community water systems must be under the supervision of a certified operator. Trained and certified operators are necessary to ensure that the systems are managed in a manner that fully protects public health and the environment.

Oregon offers two separate types of certification based on the system size:

Water systems with 150 or more connections require certification at levels 1-4 in either treatment and/or distribution.
Water systems with 149 or fewer connections (and utilizing groundwater as their only source or purchasing all their water from another public water system without adding any additional treatment) require a small water system "S" certification.