OHA Drinking Water Services
OR41
PWS ID: 91998 ---- NPS OREGON CAVES NATL MON

Most Recent Water System Survey
Survey date: Jul 11, 2025
Notification date: Jul 23, 2025 (12 days)
Regulating agency: DWS (REGION 2)
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:
Category Significant deficiency or unmet rule requirement Due date Resolved date
Management & Operations No operations and maintenance manualSep 10, 2025 Sep 11, 2025 - Late
Monitoring & Reporting No coliform sampling planSep 10, 2025 Sep 11, 2025 - Late
Disinfection Failure to calculate CT values correctlySep 10, 2025 Sep 11, 2025 - Late
Other Treatment Non-NSF approved chemicalsSep 10, 2025 Jul 23, 2025
Bold text indicates a significant deficiency. All others are unmet rule requirements.


 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) 07/11/2025 5 YR  * 07/23/2025 (12) REGION 2 Show details
Sanitary Survey, Finished (SNSV) 11/12/2020 5 YR  * 12/08/2020 (26) REGION 2 Show details
Water Treatment Plant Site Visit (TRTP) 11/12/2020 5 YR 11/12/2025 12/08/2020 (26) REGION 2 No details
Sanitary Survey, Finished (SNSV) 06/17/2015 5 YR  * 07/02/2015 (15) REGION 2 Show details
Water Treatment Plant Site Visit (TRTP) 06/17/2015 5 YR 06/17/2020 07/02/2015 (15) REGION 2 No details
Sanitary Survey, Finished (SNSV) 04/29/2010 3 YR  * 08/09/2010 (102) JOSEPHINE COUNTY Hide details
  Comments:
Management & Operations: ERP not completed. Operations & Maintenance manual not completed. Treatment: Turbidimeters not calibrated per mfr or at least quarterly. There is no flow meter on effluent side of clearwell or adequate alternative. Recommendations: 1) Maximum flow rate through the treatment plant is 32 GPM. Specifications on Strainrite cartridge indicates maximum flow of 20 GPM. 2) Planning is in process for a new 40000 gallon storage tank to replace current tanks. Make sure adequate contact time for one-long Giardia is considered during the design process. Contact DWP for a plan review prior to construction. 3) ERP and Operations & Maintenance manual are not complete. Complete as discussed.
Category Significant deficiency or unmet rule requirement Due date Resolved date
Management & Operations No operations and maintenance manualNot tracked
Management & Operations Emergency response plan not completed (CWS, NTNC)Not tracked
Surface Water Treatment Turbidimeters not calibrated per manufacturer or at least quarterlyNot tracked
Significant deficiency and unmet rule requirement dates were not tracked prior to 1/1/2014.
Sanitary Survey, Finished (SNSV) 08/11/2005 5 YR  * JOSEPHINE COUNTY Show details