OHA Drinking Water Services
OR41
PWS ID: 00239 ---- LONDON WATER CO-OP

Most Recent Water System Survey
Survey Date: Nov 05, 2025
Notification Date: Dec 12, 2025 (37 days)
Regulating Agency: DWS (REGION 2)
Survey Frequency: 3 YR  -  Visit the Water System Surveys page to see the list of surveys due each year.
Deficiencies:
Category Deficiency Due Date Resolved Date
Cross Connection Annual summary report not issued (CWS)Mar 31, 2026 *
Management & Operations Annual CCR not submitted (CWS)Mar 31, 2026 *
Operator Certification No protocol for under-certified operatorMar 31, 2026 *
Treatment UV reactors not monitored as requiredMar 31, 2026 *
Disinfection pH, temperature, and chlorine residual not measured daily at first userMar 31, 2026 *
Surface Water Treatment Turbidity standards not metMar 31, 2026 *
Surface Water Treatment Turbidimeters not calibrated per manufacturer or at least quarterlyMar 31, 2026 *
UV Disinfection Bypass around UV systemMar 31, 2026 *
Management & Operations Emergency response plan not completedJan 30, 2026 Feb 17, 2026 - Late
Disinfection Chlorine not measured & recorded as requiredJan 30, 2026 Feb 17, 2026 - Late
* Corrective Action Plan has been submitted for this deficiency.


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