OHA Drinking Water Services
OR41
PWS ID: 00937 ---- WELCHES WATER COMPANY

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   5incomplete06/15/2021
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesYearly 01/01/2026 - 12/31/2026 264 2 incomplete09/23/2025
  Seasonal sampling period:   06/01   thru   09/30
EP-A  EP FOR SPRINGS ARSENIC  9 Years 01/01/2020 - 12/31/2028 995 1 incomplete12/17/2019
EP-A  EP FOR SPRINGS IOC notes9 Years 01/01/2020 - 12/31/2028 995 1 incomplete12/17/2019
EP-A  EP FOR SPRINGS NITRATE  Yearly 01/01/2026 - 12/31/2026 264 1 incomplete12/20/2024
EP-A  EP FOR SPRINGS NITRITE notes9 Years 01/01/2020 - 12/31/2028 995 1 incomplete12/17/2019
EP-A  EP FOR SPRINGS PFAS notes6 Months 01/01/2026 - 06/30/2026 80 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP FOR SPRINGS RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,186 1 incomplete07/23/2013
EP-A  EP FOR SPRINGS RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,186 1 incomplete07/23/2013
EP-A  EP FOR SPRINGS RAD - URANIUM notes9 Years 01/01/2026 - 12/31/2034 3,186 1 incomplete07/23/2013
EP-A  EP FOR SPRINGS SOC  3 Years 01/01/2026 - 12/31/2028 995 1 incomplete12/17/2019
EP-A  EP FOR SPRINGS VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 995 1 incomplete12/17/2019

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Expired Schedules
Facility
ID
Analyte or Group    Sampling
Interval
Start End Samples
Required
   Notes
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  3 Years01/01/200212/31/20165Sample Between June 1st and Sept 30th
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months01/01/201712/31/20205
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Yearly01/01/202012/30/20202IDSE schedule. Collect two dual sample sets between June 1 and September 30. One sample must be collected near the entry point and the other near the point of maximum residence time.
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 IDSE  Yearly01/01/201712/31/20182Collect two dual sample sets between June 1 and September 30 in 2017. One sample must be collected near the entry point and the other near the point of maximum residence time.
EP-A  EP FOR SPRINGSARSENIC  3 Years01/01/200212/31/20101

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