OHA Drinking Water Services
OR41
PWS ID: 00953 ---- WILLAMINA, CITY OF

Most Recent Water System Survey
Survey date: Nov 06, 2025
Notification date: Dec 17, 2025 (41 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
Management & Operations Major modifications not approved (plan review)Aug 31, 2026 *
Disinfection No means to adequately determine disinfection contact time under peak flow and minimum storage conditionsAug 31, 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.


 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) 11/06/2025 3 YR  * 12/17/2025 (41) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 02/10/2022 3 YR  * 03/18/2022 (36) DWP No details
Water Treatment Plant Site Visit (TRTP) 02/10/2022 3 YR 02/10/2025 03/18/2022 (36) DWP No details
Sanitary Survey, Finished (SNSV) 04/23/2019 3 YR  * 05/29/2019 (36) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 04/23/2019 3 YR 04/23/2022 05/29/2019 (36) REGION 1 No details
Sanitary Survey, Finished (SNSV) 09/19/2016 3 YR  * 12/16/2016 (88) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 09/19/2016 3 YR 09/19/2019 12/16/2016 (88) REGION 1 No details
Sanitary Survey, Finished (SNSV) 07/18/2013 3 YR  * 07/30/2013 (12) DWP Hide details
 
Category Significant deficiency or unmet rule requirement Due date Resolved date
Cross Connection No ordinance or enabling authority (CWS)Not tracked
Cross Connection Annual summary report not issued (CWS)Not tracked
Disinfection No means to adequately determine flow rate on contact chamber effluent lineNot tracked
Significant deficiency and unmet rule requirement dates were not tracked prior to 1/1/2014.
Water Treatment Plant Site Visit (TRTP) 07/18/2013 3 YR 07/18/2016 07/30/2013 (12) DWP No details
Water Treatment Plant Site Visit (TRTP) 10/21/2011 3 YR 10/21/2014 11/07/2011 (17) DWP No details
Sanitary Survey, Finished (SNSV) 04/13/2010 1 YR  * 06/14/2010 (62) DWP Show details
Sanitary Survey, Finished (SNSV) 04/27/2007 3 YR  * 06/07/2007 (41) REGION 1 No details
Water Treatment Plant Site Visit (TRTP) 12/08/2005 12/08/2005 (0) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 01/15/2003 3 YR  * DWP Show details