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.


 Hide Site Visit History
Water System Site Visit History
Reason Visit date Frequency Next due Notification date
(Days after survey)		 Responsible
agency		 Comments and
significant deficiencies or unmet rule requirements
Level 2 Assessment rTCR (LV2A) 08/08/2025 DWP No details
Sanitary Survey, Finished (SNSV) 06/19/2025 5 YR  * 08/08/2025 (50) REGION 1 Show details