OHA Drinking Water Services
OR41
PWS ID: 93609 ---- MINIKAHDA WATER SYSTEM

Most Recent Water System Survey
Survey Date: Jun 24, 2025
Notification Date: Jul 01, 2025 (7 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.
Deficiencies:
Category Deficiency Due Date Resolved Date
Disinfection Minimum CT requirement not met all timesAug 19, 2025 Jan 30, 2025
Surface Water Treatment Turbidity standards not metAug 19, 2025 Dec 09, 2023


 Hide Site Visit History
Water System Site Visit History
Reason Visit Date Frequency Next Due Notification Date
(Days after survey)		 Responsible
Agency		 Comments and
Deficiencies
Sanitary Survey, Finished (SNSV) 06/24/2025 5 YR  * 07/01/2025 (7) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 09/28/2020 5 YR  * 10/23/2020 (25) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 09/28/2020 5 YR 09/28/2025 10/23/2020 (25) REGION 1 No details
Sanitary Survey, Finished (SNSV) 10/28/2015 5 YR  * 03/04/2016 (128) REGION 1 Hide details
 
Category Deficiency Due Date Resolved Date
Management & Operations No operations and maintenance manualApr 22, 2016 Apr 22, 2016
Management & Operations Emergency response plan not completedApr 22, 2016 Apr 22, 2016
Monitoring & Reporting No coliform sampling planApr 22, 2016 Apr 22, 2016
Operator Certification No protocol for under-certified operatorApr 22, 2016 Apr 22, 2016
Disinfection No means to adequately determine flow rate on contact chamber effluent lineJun 30, 2016 * Jun 22, 2016
* Corrective Action Plan has been submitted for this deficiency.
Water Treatment Plant Site Visit (TRTP) 10/28/2015 1 YR 10/28/2016 03/04/2016 (128) REGION 1 No details
Sanitary Survey, Finished (SNSV) 11/30/2010 3 YR  * 02/07/2011 (69) CLACKAMAS COUNTY Show details
Sanitary Survey, Finished (SNSV) 10/31/2005 5 YR  * 11/28/2005 (28) CLACKAMAS COUNTY No details
Sanitary Survey, Finished (SNSV) 09/15/1986 5 YR  * DWP Show details
 



More information for this water system: SDWIS ID 3185
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PFAS data are now located on the Chemical Results page.
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