OHA Drinking Water Services
OR41
PWS ID: 95757 ---- COLUMBIA BASIN ONION
Compliance and Enforcement Schedules

Type of Action Date Issued Due Date Closed Date SelectGroup SelectStatus
MCL Violation Notice Jun 17, 2025 Open MCL Violation Notice Open
SUBMIT COMPLIANCE ACTION PLAN Aug 16, 2025 Overdue MCL Violation Notice Open
Coliform Investigation Jun 20, 2025 Aug 8, 2025 Coliform Investigation Closed
COMPLETE LEVEL 2 INVESTIGATION Jul 27, 2025 Aug 8, 2025 - Late Coliform Investigation Closed
Coliform Investigation Jun 2, 2025 Jul 17, 2025 Coliform Investigation Closed
COMPLETE LEVEL 1 INVESTIGATION Jul 12, 2025 Jul 17, 2025 - Late Coliform Investigation Closed


For questions about compliance schedules, please contact Brad Daniels, DWS Compliance Specialist, at 503-735-5438 or Bradley.K.DANIELS@oha.oregon.gov.

More information for this water system: SDWIS ID 5721
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  ::  PFAS
Lead & Copper  ::  DBP Sample Sites  ::  FANLs  ::  MRDL  ::  GWR 4-Log  ::  Turbidity  ::  SWTR  ::  LRAA  ::  DW Source Protection
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