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Oregon Drinking Water Systems & Operator Certification

Certification Program

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.

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Distribution and Treatment Systems Levels 1-4

Water systems with 150 or more connections require certification at levels 1-4 in either treatment and/or distribution. Learn more...

Small Water System Operator

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. Learn more...