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.
Significant deficiencies and unmet rule requirements:
Category Significant deficiency or unmet rule requirement Due date Resolved date
Surface Water Treatment Turbidity standards not metSep 01, 2026 *
Disinfection Chlorine not measured & recordedMar 02, 2026 Dec 01, 2025
Disinfection No means to adequately determine disinfection contact time under peak flow and minimum storage conditionsMar 02, 2026 Dec 01, 2025
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.


 Hide Site Visit History
Water System Site Visit History
Reason Visit date Frequency Next due Notification date
(Days after survey)		 Responsible
agency		 Comments and
significant deficiencies or unmet rule requirements
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 Show details
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 Hide details
  Comments:
Water Treatment Plant (WTP) Site Visit

Turbidity compliance standards were not met. 10 points
Filter Optimization goals were not met. 4 points
The operator does not know all chemical dosages applied in mg/L. 3 points
Feed pumps are not calibrated at least annually. 3 points
There is no written protocol for under-certified operators to follow. 5 points

Total Points = 25

Next WTP site visit will be 05/30/2015.

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