OHA Drinking Water Services
OR41
PWS ID: 05364 ---- MT TERRACE MHP

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 Years01/01/2026 - 12/31/2026   5incomplete07/13/2023
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notes3 Years01/01/2026 - 12/31/2026   1incomplete09/13/2023
  Seasonal sampling period:   09/01   thru   09/30
EP-A  EP FOR WELLS #1 & #4 IOC notes9 Years01/01/2020 - 12/31/2028 1,015 1 done 10/28/2025
EP-A  EP FOR WELLS #1 & #4 NITRATE  Yearly 01/01/2026 - 12/31/2026 284 1 incomplete10/28/2025
EP-A  EP FOR WELLS #1 & #4 NITRITE  9 Years01/01/2020 - 12/31/2028 1,015 1 done 10/28/2025
EP-A  EP FOR WELLS #1 & #4 PFAS notes6 Months 01/01/2026 - 06/30/2026 100 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP FOR WELLS #1 & #4 RAD - GROSS ALPHA  9 Years 01/01/2026 - 12/31/2034 3,206 1 incomplete04/29/2014
EP-A  EP FOR WELLS #1 & #4 RAD - RADIUM 226/228 9 Years 01/01/2026 - 12/31/2034 3,206 1 incomplete04/29/2014
EP-A  EP FOR WELLS #1 & #4 RAD - URANIUM  9 Years 01/01/2026 - 12/31/2034 3,206 1 incomplete10/28/2025
EP-A  EP FOR WELLS #1 & #4 SOC  3 Years 01/01/2026 - 12/31/2028 1,015 1 incomplete10/28/2025
EP-A  EP FOR WELLS #1 & #4 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,015 1 incomplete10/28/2025
POU-01 (#25)  POU FOR SITE #25 ARSENIC notesQuarterly 01/01/2026 - 03/31/2026 9 1 incomplete09/21/2025
POU-25  POU FOR ARSENIC REMOVAL ARSENIC notesYearly 01/01/2026 - 12/31/2026 284 8 incomplete07/14/2025

6  secs
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Expired Schedules
Facility
ID
Analyte or Group    Sampling
Interval
Start End Samples
Required
   Notes
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  3 Years01/01/200512/31/20131Sample between June 1 and Sept. 30.
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Yearly01/01/200412/31/20041Sample Between June 1st and Sept 30th Each Year
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  Yearly01/01/200212/31/20035Sample Between June 1st and Sept 30th
EP-A  EP FOR WELLS #1 & #4ARSENIC  3 Years01/01/200212/31/20161
EP-A  EP FOR WELLS #1 & #4ARSENIC  Quarterly01/01/201706/30/20191
EP-A  EP FOR WELLS #1 & #4IOC  3 Years01/01/200212/31/20101
EP-A  EP FOR WELLS #1 & #4NITRITE  3 Years01/01/200212/31/20101
EP-A  EP FOR WELLS #1 & #4RAD - GROSS ALPHA  Quarterly01/01/201006/30/20141
EP-A  EP FOR WELLS #1 & #4RAD - RADIUM 226/228  Quarterly01/01/201006/30/20141
EP-A  EP FOR WELLS #1 & #4RAD - URANIUM  Quarterly01/01/201006/30/20141
POU-25  POU FOR ARSENIC REMOVALARSENIC  Quarterly07/01/201906/30/20208Sample one third of the total number of point-of-use devices every calendar quarter.

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