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)Jan 30, 2026
Management & Operations Emergency response plan not completedJan 30, 2026
Management & Operations Annual CCR not submitted (CWS)Jan 30, 2026
Operator Certification No protocol for under-certified operatorJan 30, 2026
Treatment UV reactors not monitored as requiredJan 30, 2026
Disinfection Chlorine not measured & recorded as requiredJan 30, 2026
Disinfection pH, temperature, and chlorine residual not measured daily at first userJan 30, 2026
Surface Water Treatment Turbidity standards not metJan 30, 2026
Surface Water Treatment Turbidimeters not calibrated per manufacturer or at least quarterlyJan 30, 2026
UV Disinfection Bypass around UV systemJan 30, 2026


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More information for this water system: SDWIS ID 3944
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