OHA Drinking Water Services
OR41
PWS ID: 00232 ---- COLORADO LAKE COOP

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 Years01/01/2027 - 12/31/2027   5 09/10/2024
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesYearly 01/01/2026 - 12/31/2026 304 1 incomplete09/02/2025
  Seasonal sampling period:   08/01   thru   08/31
EP-A  EP FOR WELL ARSENIC notes9 Years 01/01/2023 - 12/31/2031 2,130 1 incomplete08/07/2019
EP-A  EP FOR WELL IOC notes9 Years 01/01/2020 - 12/31/2028 1,035 1 incomplete08/07/2019
EP-A  EP FOR WELL NITRATE  Quarterly 01/01/2026 - 03/31/2026 29 1 incomplete10/08/2025
EP-A  EP FOR WELL NITRITE notes9 Years 01/01/2020 - 12/31/2028 1,035 1 incomplete08/07/2019
EP-A  EP FOR WELL PFAS notes6 Months 01/01/2026 - 06/30/2026 120 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP FOR WELL RAD - GROSS ALPHA  9 Years 01/01/2026 - 12/31/2034 3,226 1 incomplete05/13/2025
EP-A  EP FOR WELL RAD - RADIUM 226/228 9 Years 01/01/2026 - 12/31/2034 3,226 1 incomplete03/18/2022
EP-A  EP FOR WELL RAD - URANIUM  9 Years 01/01/2023 - 12/31/2031 2,130 1 incomplete03/18/2022
EP-A  EP FOR WELL SOC  3 Years 01/01/2026 - 12/31/2028 1,035 1 incomplete05/13/2025
EP-A  EP FOR WELL VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,035 1 incomplete05/13/2025

5  secs
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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Yearly01/01/201012/31/20131Sample between June 1st and September 30th
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  3 Years01/01/200212/31/20125Sample Between June 1st and Sept 30th
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months01/01/201312/31/20145
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months01/01/201612/31/20185
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  Yearly01/01/201512/31/20155
EP-A  EP FOR WELLARSENIC  3 Years01/01/200212/31/20131
EP-A  EP FOR WELLNITRATE  Quarterly07/01/201706/30/20181
EP-A  EP FOR WELLNITRATE  Yearly01/01/200212/31/20161
EP-A  EP FOR WELLNITRATE  Yearly01/01/201904/30/20241
EP-A  EP FOR WELLRAD - URANIUM  6 Years01/01/200812/31/20131Schedule reflects monitoring reduction granted.

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