OHA Drinking Water Services
OR41
PWS ID: 00953 ---- WILLAMINA, CITY OF

Most Recent Water System Survey
Survey date: Nov 06, 2025
Notification date: Dec 17, 2025 (41 days)
Regulating agency: DWS (REGION 1)
Survey frequency: 3 YR  -  Visit the Water System Surveys page to see the list of surveys due each year.
Significant deficiencies and unmet rule requirements:
Category Significant deficiency or unmet rule requirement Due date Resolved date
Management & Operations Major modifications not approved (plan review)Aug 31, 2026 *
Disinfection No means to adequately determine disinfection contact time under peak flow and minimum storage conditionsAug 31, 2026 *
Bold text indicates a significant deficiency. All others are unmet rule requirements.
* A corrective action plan has been submitted for this significant deficiency or unmet rule requirement.


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