OHA Drinking Water Services
OR41
PWS ID: 94063 ---- WEST LINN/WILSONVILLE SD

Most Recent Water System Survey
Survey Date: Aug 07, 2025
Notification Date: Sep 12, 2025 (36 days)
Regulating Agency: CLACKAMAS COUNTY
Survey Frequency: 5 YR  -  Visit the Water System Surveys page to see the list of surveys due each year.
Deficiencies:
Category Deficiency Due Date Resolved Date
Operator Certification No certified operator at required levelJan 16, 2026
UV Disinfection Bypass around UV systemJan 16, 2026


 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) 08/07/2025 5 YR  * 09/12/2025 (36) CLACKAMAS COUNTY Show details
Sanitary Survey, Finished (SNSV) 09/30/2020 5 YR  * 10/28/2020 (28) CLACKAMAS COUNTY Show details
Sanitary Survey, Finished (SNSV) 06/23/2015 5 YR  * 08/06/2015 (44) CLACKAMAS COUNTY Hide details
 
Category Deficiency Due Date Resolved Date
Management & Operations Major modifications not approved (plan review)Dec 10, 2015 Mar 03, 2021 - Late
Well Construction No screen on existing well ventDec 10, 2015 May 25, 2016 - Late
Sanitary Survey, Finished (SNSV) 06/29/2010 5 YR  * 08/10/2010 (42) CLACKAMAS COUNTY Show details
Sanitary Survey, Finished (SNSV) 05/26/2005 5 YR  * CLACKAMAS COUNTY Show details
 



More information for this water system: SDWIS ID 1557
System Info  ::  Report for Lenders  ::  Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Contacts & Advisories  ::  Site Visits  ::  Public Notice
Coliform Summary  ::  Coliform Results  ::  Coliform Schedules  ::  LT2  ::  GW/GWUDI Source Details  ::  Plan Review  ::  Annual Fee
Chemical Summary  ::  Chemical Results  ::  Chemical Schedules  ::  Chemical Schedule Summary  ::  Arsenic RAA  ::  Cyanotoxins
Lead & Copper  ::  DBP Sample Sites  ::  FANLs  ::  MRDL  ::  GWR 4-Log  ::  Turbidity  ::  SWTR  ::  LRAA  ::  DW Source Protection
PFAS data are now located on the Chemical Results page.
Information for all water systems:
Water System Inventory  ::  Water System Surveys  ::  Outstanding Performers  ::  Treatment Plant Inspections  ::  Treatment  ::  Plan Reviews
Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Deficiencies  ::  System Scores  ::  Exceedances  ::  Public Notices  ::  Service Lines
Water Advisories  ::  Contact Reports  ::  Cyanotoxins  ::  PFAS  ::  Post-wildfire VOCs  ::  Fluoride  ::  Certification List  ::  DW Source Protection
Main menu:
Introduction  ::  Data Search Options  ::  Water System Search  ::  DWS Home  ::  DWS Rules
Need help? Email Drinking Water Services for assistance.Staff/Partner Login