OHA Drinking Water Services
OR41
PWS ID: 00968 ---- YAMHILL, CITY OF

Most Recent Water System Survey
Survey Date: Nov 13, 2025
Notification Date: Jan 02, 2026 (50 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 No means to adequately determine disinfection contact time under peak flow and minimum storage conditionsFeb 20, 2026 Overdue
Surface Water Treatment Incorrect location for compliance turbidity monitoringFeb 20, 2026 Overdue
Bold text indicates that resolving this deficiency is a top priority.


 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) 11/13/2025 3 YR  * 01/02/2026 (50) REGION 1 Hide details
 
Category Deficiency Due Date Resolved Date
Disinfection No means to adequately determine disinfection contact time under peak flow and minimum storage conditionsFeb 20, 2026 Overdue
Surface Water Treatment Incorrect location for compliance turbidity monitoringFeb 20, 2026 Overdue
Sanitary Survey, Finished (SNSV) 06/20/2022 3 YR  * 07/25/2022 (35) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 06/20/2022 3 YR 06/20/2025 07/25/2022 (35) REGION 1 No details
Sanitary Survey, Finished (SNSV) 11/30/2017 5 YR  * 03/23/2018 (113) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 11/30/2017 3 YR 11/30/2020 03/23/2018 (113) REGION 1 No details
Sanitary Survey, Finished (SNSV) 05/14/2014 3 YR  * 05/19/2014 (5) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 05/14/2014 3 YR 05/14/2017 05/19/2014 (5) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 06/24/2009 5 YR  * 07/06/2009 (12) DWP Show details
Water Treatment Plant Site Visit (TRTP) 06/24/2009 5 YR 06/24/2014 07/06/2009 (12) DWP Show details
Sanitary Survey, Finished (SNSV) 11/02/2006 3 YR  * 11/30/2006 (28) REGION 3 No details
Water Treatment Plant Site Visit (TRTP) 02/24/2005 3 YR 02/24/2008 02/24/2005 (0) REGION 3 No details
Sanitary Survey, Finished (SNSV) 12/11/2003 3 YR  * DWP Show details
 



More information for this water system: SDWIS ID 4691
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