OHA Drinking Water Services
OR41
PWS ID: 01139 ---- MIDLAND WATER ASSOCIATION

Most Recent Water System Survey
Survey Date: Nov 27, 2025
Notification Date: Jan 12, 2026 (46 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.
Deficiencies:
Category Deficiency Due Date Resolved Date
Disinfection Chlorine not measured & recorded as requiredMar 02, 2026
Disinfection No means to adequately determine disinfection contact time under peak flow and minimum storage conditionsMar 02, 2026
Surface Water Treatment Turbidity standards not metMar 02, 2026


 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) 11/27/2025 3 YR  * 01/12/2026 (46) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 03/24/2022 3 YR  * 05/16/2022 (53) DWP Hide details
 
Category Deficiency Due Date Resolved Date
Cross Connection Annual summary report not issued (CWS)Jul 05, 2022 Jan 02, 2024 - Late
Management & Operations No operations and maintenance manualJul 05, 2022 Dec 01, 2023 - Late
Management & Operations Emergency response plan not completedJul 05, 2022 Oct 01, 2023 - Late
Management & Operations Annual CCR not submitted (CWS)Jul 05, 2022 Jan 02, 2024 - Late
Monitoring & Reporting Monitoring not currentJul 05, 2022 Jun 01, 2024 - Late
Operator Certification No certified operator at required levelJul 05, 2022 Mar 01, 2024 - Late
Operator Certification No protocol for under-certified operatorJul 05, 2022 Dec 27, 2023 - Late
Disinfection Failure to calculate CT values correctlyJul 05, 2022 Jun 01, 2024 - Late
Other Treatment Non-NSF approved chemicalsJul 05, 2022 Dec 27, 2023 - Late
Surface Water Treatment For conventional or direct filtration: Turbidity profile not conducted on individual filters at least quarterlyJul 05, 2022 Jun 01, 2023 - Late
Water Treatment Plant Site Visit (TRTP) 03/24/2022 6 MN 09/24/2022 05/16/2022 (53) DWP No details
Sanitary Survey, Finished (SNSV) 09/14/2017 3 YR  * 10/06/2017 (22) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 09/14/2017 1 YR 09/14/2018 10/06/2017 (22) REGION 1 No details
Comprehensive Performance Evaluation (CPE) (CPEV) 01/14/2015 03/12/2015 (57) DWP Show details
Sanitary Survey, Finished (SNSV) 05/30/2014 3 YR  * 06/16/2014 (17) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 05/30/2014 1 YR 05/30/2015 06/16/2014 (17) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 11/30/2011 3 YR  * 12/12/2011 (12) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 11/30/2011 6 MN 05/30/2012 12/12/2011 (12) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 03/24/2011 6 MN 09/24/2011 04/08/2011 (15) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 10/02/2008 3 YR  * 10/15/2008 (13) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 10/02/2008 6 MN 04/02/2009 10/15/2008 (13) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 08/13/2002 3 YR  * DWP Show details
 




More information for this water system: SDWIS ID 4011
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PFAS data are now located on the Chemical Results page.

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