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.
Significant deficiencies and unmet rule requirements:
Category Significant deficiency or unmet rule requirement Due date Resolved date
Management & Operations Annual CCR not distributed (CWS)Mar 31, 2026 * Overdue
Operator Certification No protocol for under-certified operatorMar 31, 2026 * Overdue
Disinfection pH, temperature, and chlorine residual not measured daily at first userMar 31, 2026 * Overdue
Surface Water Treatment Turbidity standards not metMar 31, 2026 * Overdue
Management & Operations Emergency response plan not completed (CWS, NTNC)Jan 30, 2026 Feb 17, 2026 - Late
Disinfection Chlorine not measured & recordedJan 30, 2026 Feb 17, 2026 - Late
Cross Connection Annual summary report not issued (CWS)Mar 31, 2026 * Feb 06, 2026
Surface Water Treatment Turbidimeters not calibrated per manufacturer or at least quarterlyMar 31, 2026 * Feb 17, 2026
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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