OHA Drinking Water Services
OR41
PWS ID: 95706 ---- NPS OREGON CAVES NATIONAL MONUMENT O&M

See also: Coliform Schedules

Chemical Sampling Schedule Status
Facility
ID
Analyte or Group   Sampling
Interval
Monitoring Period Days
Until
End
Samples
Required
Samples
Received
Last
Sample
Date
Start End
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER  6 Months01/01/2026 - 06/30/2026 90 5 done 03/03/2026
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesYearly 01/01/2026 - 12/31/2026 274 1 incomplete08/19/2025
  Seasonal sampling period:   08/01   thru   08/31
EP-A  EP FOR UNNAMED SPRINGS ARSENIC  Yearly 01/01/2026 - 12/31/2026 274 1 incomplete12/02/2025
EP-A  EP FOR UNNAMED SPRINGS IOC  Yearly 01/01/2026 - 12/31/2026 274 1 incomplete11/18/2025
EP-A  EP FOR UNNAMED SPRINGS NITRATE  Yearly 01/01/2026 - 12/31/2026 274 1 incomplete11/18/2025
EP-A  EP FOR UNNAMED SPRINGS NITRITE  Yearly 01/01/2026 - 12/31/2026 274 1 incomplete11/18/2025
EP-A  EP FOR UNNAMED SPRINGS PFAS notesQuarterly 04/01/2026 - 06/30/2026 90 1 incomplete
  Initial monitoring - 4 quarters only
EP-A  EP FOR UNNAMED SPRINGS SOC  3 Years 01/01/2026 - 12/31/2028 1,005 1 incomplete09/16/2025
EP-A  EP FOR UNNAMED SPRINGS VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 274 1 incomplete11/18/2025

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