OHA Drinking Water Services
OR41
PWS ID: 00922 ---- VERNONIA, CITY OF

Most Recent Water System Survey
Survey date: Sep 10, 2025
Notification date: Nov 14, 2025 (65 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:
No significant deficiencies or unmet rule requirements were identified.


 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) 09/10/2025 3 YR  * 11/14/2025 (65) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 09/27/2022 3 YR  * 11/29/2022 (63) REGION 1 Hide details
 
Category Significant deficiency or unmet rule requirement Due date Resolved date
Surface Water Treatment Turbidimeters not calibrated per manufacturer or at least quarterlyJan 17, 2023 Jan 01, 2023
Surface Water Treatment Conventional or direct filtration: Turbidity profile not conducted on individual filters at least quarterlyJan 17, 2023 Jan 01, 2023
Management & Operations Emergency response plan not completed (CWS, NTNC)Apr 01, 2023 * Jun 23, 2023 - Late
Management & Operations Master plan not current (≥ 300 connections)Jun 01, 2023 * Jun 23, 2023 - Late
* A corrective action plan has been submitted for this significant deficiency or unmet rule requirement.
Water Treatment Plant Site Visit (TRTP) 09/27/2022 3 YR 09/27/2025 11/29/2022 (63) REGION 1 No details
Sanitary Survey, Finished (SNSV) 12/18/2019 3 YR  * 01/31/2020 (44) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 12/18/2019 6 MN 06/18/2020 01/31/2020 (44) REGION 1 No details
Sanitary Survey, Finished (SNSV) 04/20/2016 3 YR  * 05/06/2016 (16) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 04/20/2016 6 MN 10/20/2016 05/06/2016 (16) REGION 1 No details
Sanitary Survey, Finished (SNSV) 10/16/2013 3 YR  * 11/07/2013 (22) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 10/16/2013 6 MN 04/16/2014 REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 06/29/2011 6 MN 12/29/2011 07/08/2011 (9) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 10/12/2010 3 YR  * 11/09/2010 (28) REGION 1 Show details
Water Treatment Plant Site Visit (TRTP) 10/12/2010 6 MN 04/12/2011 11/09/2010 (28) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 06/12/2007 3 YR  * 06/21/2007 (9) REGION 1 No details
Sanitary Survey, Finished (SNSV) 10/09/2002 3 YR  * DWP Show details