OHA Drinking Water Services
OR41
PWS ID: 90575 ---- HARPER HIGH/ELEMENTARY SD 66

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 notes3 Years01/01/2028 - 12/31/2028   5 09/24/2025
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notes3 Years01/01/2026 - 12/31/2026   1incomplete09/20/2023
  Seasonal sampling period:   09/01   thru   09/30
EP-A  EP FOR WELL ARSENIC  Yearly 01/01/2026 - 12/31/2026 281 1 incomplete10/22/2025
EP-A  EP FOR WELL IOC  9 Years 01/01/2026 - 12/31/2034 3,203 1 incomplete10/22/2025
EP-A  EP FOR WELL NITRATE  Yearly 01/01/2026 - 12/31/2026 281 1 incomplete04/16/2025
EP-A  EP FOR WELL NITRITE  9 Years 01/01/2026 - 12/31/2034 3,203 1 incomplete10/22/2025
EP-A  EP FOR WELL PFAS notes6 Months 01/01/2026 - 06/30/2026 97 1 incomplete10/21/2025
  Initial monitoring - 2 samples only
EP-A  EP FOR WELL SOC  3 Years 01/01/2026 - 12/31/2028 1,012 1 incomplete10/22/2025
EP-A  EP FOR WELL VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,012 1 incomplete10/22/2025

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Expired Schedules
Facility
ID
Analyte or Group    Sampling
Interval
Start End Samples
Required
   Notes
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  3 Years01/01/200912/31/20131Sample between June 1 and Sept. 30. Monioring reduction granted.
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Yearly01/01/200812/31/20081Sample between June 1 and Sept. 30.
EP-A  EP FOR WELLARSENIC  3 Years01/01/200206/30/20221Arsenic treatment unit is maintained in August each year prior to school opening. GB 1/21/2010
EP-A  EP FOR WELLARSENIC  Monthly08/01/202207/31/20251Monthly arsenic monitoring to track treatment effectiveness.
EP-A  EP FOR WELLARSENIC  Quarterly07/01/202207/31/20221
EP-A  EP FOR WELLIOC  3 Years01/01/200212/31/20071
EP-A  EP FOR WELLNITRITE  3 Years01/01/200212/31/20071

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