OHA Drinking Water Services
OR41
PWS ID: 95757 ---- COLUMBIA BASIN ONION

Most Recent Water System Survey
Survey date: Jun 19, 2025
Notification date: Aug 08, 2025 (50 days)
Regulating agency: DWS (REGION 1)
Survey frequency: 5 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 No operations and maintenance manualDec 12, 2025 Overdue
Management & Operations Emergency response plan not completed (CWS, NTNC)Dec 12, 2025 Overdue
Monitoring & Reporting Unaddressed MCL violationsDec 12, 2025 Overdue
Management & Operations Major modifications not approved (plan review)Dec 12, 2025 Dec 19, 2025 - Late
Operator Certification No DRC at required certification level Dec 12, 2025 Sep 03, 2025
Bold text indicates a significant deficiency. All others are unmet rule requirements.


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