OHA Drinking Water Services
OR41
PWS ID: 00091 ---- AVION WC - GREATER AVION

Most Recent Water System Survey
Survey date: Oct 30, 2025
Notification date: Dec 03, 2025 (34 days)
Regulating agency: DWS (REGION 1)
Survey frequency: 5 YR  -  Visit the Water System Surveys page to see the list of surveys due each year.
Significant deficiencies and unmet rule requirements: Outstanding Performer!
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) 10/30/2025 5 YR  * 12/03/2025 (34) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 09/07/2022 3 YR  * 12/02/2022 (86) REGION 1 No details
Sanitary Survey, Finished (SNSV) 07/10/2019 3 YR  * 08/26/2019 (47) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 04/13/2016 3 YR  * 05/09/2016 (26) REGION 1 Show details
Sanitary Survey, Finished (SNSV) 04/17/2013 3 YR  * 07/03/2013 (77) DWP Show details
Sanitary Survey, Finished (SNSV) 04/01/2010 3 YR  * 05/11/2010 (40) DWP Hide details
  Comments:
Significant Deficiencies/Rules Violations are as follows:
  • Replace seal between casing and cap on Conestoga Well - corrected 7/1/2010.
  • Install proper screens on vented wells - corrected 7/1/2010.
  • Install screens on air vents for China Hat Reservoir #2 - corrected 7/1/2010.
  • Locate overflow piping for Lower and Middle Sundance reservoirs
  • Collect Radium 226/228 sample for EP-B, and collect two additional quarters of radiological data for EP-J - corrected 9/10/2011.
  • Develop written Operations & Maintenance Manual
  • Develop written instructions for non-DRC operators

Notified water system of remaining deficiencies to correct on 1/16/2013

Category Significant deficiency or unmet rule requirement Due date Resolved date
Finished Water Storage No flap valve, screen, or equivalent on overflow or drainNot tracked
Finished Water Storage No screened ventNot tracked
Management & Operations No operations and maintenance manualNot tracked
Well Construction Sanitary seal and casing not watertightNot tracked
Well Construction Unscreened well ventNot tracked
Significant deficiency and unmet rule requirement dates were not tracked prior to 1/1/2014.
Sanitary Survey, Finished (SNSV) 08/16/2006 5 YR  * 09/19/2006 (34) REGION 3 No details
Sanitary Survey, Finished (SNSV) 01/18/2001 5 YR  * DWP Show details