OHA Drinking Water Services
OR41
PWS ID: 00719 ---- UMPQUA BASIN WATER ASSOC

Most Recent Water System Survey
Survey date: Sep 12, 2025
Notification date: Sep 24, 2025 (12 days)
Regulating agency: DWS (REGION 2)
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
Disinfection Unable to demonstrate minimum CTs are metJul 31, 2026 *
Disinfection Failure to calculate CT values correctlyJul 31, 2026 *
Management & Operations Public notice not issued as requiredNov 12, 2025 Jan 29, 2026 - Late
Surface Water Treatment Membrane filtration: Direct integrity testing does not meet requirementsNov 12, 2025 Jan 29, 2029 - Late
* 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) 09/12/2025 3 YR  * 09/24/2025 (12) REGION 2 Show details
Sanitary Survey, Finished (SNSV) 11/09/2022 3 YR  * 01/20/2023 (72) REGION 2 Show details
Water Treatment Plant Site Visit (TRTP) 11/09/2022 3 YR 11/09/2025 01/20/2023 (72) REGION 2 No details
Sanitary Survey, Finished (SNSV) 08/29/2017 5 YR  * 12/19/2017 (112) REGION 2 Show details
Water Treatment Plant Site Visit (TRTP) 08/29/2017 5 YR 08/29/2022 12/19/2017 (112) REGION 2 No details
Sanitary Survey, Finished (SNSV) 12/20/2012 5 YR  * 07/11/2013 (203) REGION 2 Hide details
  Outstanding performer for this survey period.

This site visit has not been entered into the deficiency database.

Water Treatment Plant Site Visit (TRTP) 12/20/2012 5 YR 12/20/2017 07/11/2013 (203) REGION 2 No details
Sanitary Survey, Finished (SNSV) 08/19/2009 3 YR  * REGION 2 No details
Water Treatment Plant Site Visit (TRTP) 08/19/2009 3 YR 08/19/2012 REGION 2 No details
Sanitary Survey, Finished (SNSV) 04/19/2006 3 YR  * 04/19/2006 (0) REGION 2 No details
Water Treatment Plant Site Visit (TRTP) 04/19/2006 3 YR 04/19/2009 04/19/2006 (0) REGION 2 No details
Water Treatment Plant Site Visit (TRTP) 11/30/2005 3 YR 11/30/2008 11/30/2005 (0) REGION 2 No details
Sanitary Survey, Finished (SNSV) 06/26/2003 3 YR  * DWP Show details