OHA Drinking Water Services
OR41
PWS ID: 00823 ---- SILVERTON, CITY OF

Most Recent Water System Survey
Survey date: Jul 24, 2025
Notification date: Aug 12, 2025 (19 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
Disinfection No means to adequately determine flow rate on contact chamber effluent lineDec 31, 2026 *
Disinfection No means to adequately determine disinfection contact time under peak flow and minimum storage conditionsDec 31, 2026 *
Cross Connection No cross connection control specialist (CWS ≥ 300 connections)Sep 30, 2025 Aug 14, 2025
Disinfection Chlorine not measured & recordedSep 30, 2025 Aug 26, 2025
Management & Operations Major modifications not approved (plan review)Dec 31, 2025 * Feb 24, 2026 - Late
Operator Certification No protocol for under-certified operatorDec 31, 2025 * Jan 07, 2026 - Late
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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