OAR 333-061-0220
Classification of Water Treatment Plants and Water Distribution Systems
(1)
Small water system classification applies when a water system serves 150 service connections or less and:(a)
Uses only groundwater as its source; or(b)
Purchases finished water from another public water system.(2)
Water distribution classification applies when a water system is not classified as small in accordance with section (1) of this rule, and is based on the population served by the water system as follows:(3)
Water treatment classification applies to water treatment plants when:(a)
A water system is not classified as small in accordance with section (1) of this rule; and(b)
Treatment is provided for contaminants identified in OAR 333-061-0030 (Maximum Contaminant Levels and Action Levels)(1) through (5) and (7) by that water treatment plant.(c)
Water treatment classification is based on a point system that reflects the complexity of water treatment present. Points are assigned as follows:(4)
Filtration endorsement is an additional classification that applies when a water treatment plant is classified as Water Treatment 2 and uses conventional or direct filtration treatment to treat surface water or groundwater under the influence of surface water. Filtration endorsement certification, as prescribed by OAR 333-061-0235 (Operator Certification Requirements, Levels 1–4), is required for operators designated in direct responsible charge of a water treatment plant receiving the filtration endorsement classification, except for those operators already certified at Water Treatment Level 3 or higher.
Source:
Rule 333-061-0220 — Classification of Water Treatment Plants and Water Distribution Systems, https://secure.sos.state.or.us/oard/view.action?ruleNumber=333-061-0220
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