OHA Drinking Water Services
OR41
PWS ID: 93711 ---- CORVALLIS WALDORF ASSOCIATION

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 Months 01/01/2026 - 06/30/2026 178 10 incomplete08/26/2025
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notes3 Years01/01/2027 - 12/31/2027   1 07/22/2024
 Seasonal sampling period:  07/01  thru  07/31
EP-A  EP for WELLATRAZINE  Yearly01/01/2026 - 12/31/2026 362 1 incomplete 09/08/2025
EP-A  EP for WELL ARSENIC notes9 Years 01/01/2020 - 12/31/2028 1,093 1 incomplete06/08/2015
EP-A  EP for WELL IOC notes9 Years 01/01/2020 - 12/31/2028 1,093 1 incomplete06/08/2015
EP-A  EP for WELL NITRATE  Yearly 01/01/2026 - 12/31/2026 362 1 incomplete09/08/2025
EP-A  EP for WELL NITRITE notes9 Years 01/01/2020 - 12/31/2028 1,093 1 incomplete06/08/2015
EP-A  EP for WELL SOC  3 Years 01/01/2026 - 12/31/2028 1,093 1 incomplete09/08/2025
EP-A  EP for WELL VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,093 1 incomplete09/08/2025

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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  3 Years01/01/200512/31/20131Sample 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  3 Years01/01/200206/30/20105Sample Between June 1st and Sept 30th
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  3 Years01/01/201812/31/20235
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months07/01/201012/31/20175
EP-A  EP for WELLARSENIC  3 Years01/01/200212/31/20101
EP-A  EP for WELLATRAZINE   Quarterly07/01/201909/30/20201
EP-A  EP for WELLNITRATE  Quarterly10/01/200712/31/20151
EP-A  EP for WELLNITRATE  Yearly01/01/200209/30/20071R&C below MCL for NO3 as of 05/01/2002 - Sample in the 2nd Quarter

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More information for this water system: SDWIS ID 1417
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