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

Most Recent Water System Survey
Survey Date: Sep 27, 2022
Notification Date: Nov 29, 2022 (63 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.
Deficiencies:
Category Deficiency Due Date Resolved Date
Surface Water Treatment Turbidimeters not calibrated per manufacturer or at least quarterlyJan 17, 2023 Jan 01, 2023
Surface Water Treatment For 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 completedApr 01, 2023 * Jun 23, 2023 - Late
Management & Operations Master plan not current (≥ 300 con.)Jun 01, 2023 * Jun 23, 2023 - Late
* Corrective Action Plan has been submitted for this deficiency.


 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) 09/27/2022 3 YR  * 11/29/2022 (63) REGION 1 Show details
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 Hide details
  Comments:
1. Incorrect compliance turbidity monitoring location. 2. An auto dial alarm directly to an operator for high effluent turbidity is recommended so that operators may quickly respond to a treatment failure. 3. Turbidity profiles must be conducted quarterly on each filter following a backwash. 4. The contact time through the clearwell must be based on a tracer study. 5. Be sure to verify that adequate disinfection is occurring, by calculating CTs (chlorine residual at first user multiplied by contact time) every day 6. The DWP has no record of paired raw/treated total organic carbon (TOC), and raw alkalinity data since 2007. 7. An Operations and Maintenance (O&M) Manual needs to be developed. 8. An Emergency Response Plan needs to be developed for the water system.
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
 



More information for this water system: SDWIS ID 3998
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