OHA Drinking Water Services
OR41
PWS ID: 00958 ---- YONCALLA, CITY OF

Most Recent Water System Survey
Survey Date: Jun 18, 2025
Notification Date: Jul 16, 2025 (28 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.
Deficiencies:
Category Deficiency Due Date Resolved Date
Cross Connection Annual summary report not issued (CWS)Sep 03, 2025 Overdue
Cross Connection Testing records not current (CWS, NTNC, TNC)Sep 03, 2025 Overdue
Disinfection Minimum CT requirement not met all timesSep 03, 2025 Overdue
Disinfection No means to adequately determine flow rate on contact chamber effluent lineSep 03, 2025 Overdue
Disinfection pH, temperature, and chlorine residual not measured daily at first userSep 03, 2025 Overdue
Disinfection Failure to calculate CT values correctlySep 03, 2025 Overdue
Disinfection No means to adequately determine disinfection contact time under peak flow and minimum storage conditionsSep 03, 2025 Overdue


 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) 06/18/2025 3 YR  * 07/16/2025 (28) REGION 2 Hide details
 
Category Deficiency Due Date Resolved Date
Cross Connection Annual summary report not issued (CWS)Sep 03, 2025 Overdue
Cross Connection Testing records not current (CWS, NTNC, TNC)Sep 03, 2025 Overdue
Disinfection Minimum CT requirement not met all timesSep 03, 2025 Overdue
Disinfection No means to adequately determine flow rate on contact chamber effluent lineSep 03, 2025 Overdue
Disinfection pH, temperature, and chlorine residual not measured daily at first userSep 03, 2025 Overdue
Disinfection Failure to calculate CT values correctlySep 03, 2025 Overdue
Disinfection No means to adequately determine disinfection contact time under peak flow and minimum storage conditionsSep 03, 2025 Overdue
Sanitary Survey, Finished (SNSV) 12/01/2022 3 YR  * 01/13/2023 (43) REGION 2 Show details
Water Treatment Plant Site Visit (TRTP) 12/01/2022 3 YR 12/01/2025 01/03/2023 (33) REGION 2 No details
Sanitary Survey, Finished (SNSV) 12/02/2019 3 YR  * 01/17/2020 (46) DWP Show details
Water Treatment Plant Site Visit (TRTP) 12/02/2019 3 YR 12/02/2022 01/17/2020 (46) DWP No details
Sanitary Survey, Finished (SNSV) 12/07/2016 3 YR  * 02/13/2017 (68) REGION 2 Show details
Water Treatment Plant Site Visit (TRTP) 12/07/2016 3 YR 12/07/2019 02/13/2017 (68) REGION 2 No details
Sanitary Survey, Finished (SNSV) 07/25/2013 3 YR  * REGION 2 No details
Water Treatment Plant Site Visit (TRTP) 07/25/2013 3 YR 07/25/2016 REGION 2 No details
Sanitary Survey, Finished (SNSV) 12/08/2010 3 YR  * REGION 2 Show details
Water Treatment Plant Site Visit (TRTP) 12/08/2010 3 YR 12/08/2013 REGION 2 No details
Sanitary Survey, Finished (SNSV) 09/18/2007 3 YR  * 09/18/2007 (0) REGION 2 No details
Water Treatment Plant Site Visit (TRTP) 09/18/2007 3 YR 09/18/2010 09/18/2007 (0) REGION 2 No details
Sanitary Survey, Finished (SNSV) 03/29/2005 3 YR  * DWP Show details
Water Treatment Plant Site Visit (TRTP) 03/29/2005 3 YR 03/29/2008 03/29/2005 (0) REGION 2 No details
 




More information for this water system: SDWIS ID 4130
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