OHA Drinking Water Services
OR41
PWS ID: 00304 ---- ALDERWOOD WATER DEV CO

See also: Coliform Schedules  ::  LT2 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 173 5 incomplete02/12/2025
DIST-A  Distribution System STAGE 2 DBP  Quarterly 01/01/2026 - 03/31/2026 82 1 incomplete08/12/2025
EP-A  EP FOR WOAHINK LAKE ARSENIC  9 Years 01/01/2020 - 12/31/2028 1,088 1 incomplete09/20/2016
EP-A  EP FOR WOAHINK LAKE IOC notes9 Years 01/01/2023 - 12/31/2031 2,183 1 incomplete09/20/2016
EP-A  EP FOR WOAHINK LAKE NITRATE  Yearly 01/01/2026 - 12/31/2026 357 1 incomplete02/04/2025
EP-A  EP FOR WOAHINK LAKE NITRITE notes9 Years 01/01/2023 - 12/31/2031 2,183 1 incomplete09/20/2016
EP-A  EP FOR WOAHINK LAKE RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,279 1 incomplete05/06/2025
EP-A  EP FOR WOAHINK LAKE RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,279 1 incomplete05/06/2025
EP-A  EP FOR WOAHINK LAKE RAD - URANIUM notes9 Years 01/01/2026 - 12/31/2034 3,279 1 incomplete05/06/2025
EP-A  EP FOR WOAHINK LAKE SOC  3 Years 01/01/2026 - 12/31/2028 1,088 1 incomplete08/23/2022
EP-A  EP FOR WOAHINK LAKE VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 357 1 incomplete08/06/2024

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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
DIST-A  Distribution SystemASBESTOS, DIST  9 Years01/01/200212/31/20181removed asbestos pipe -12/10/2019
DIST-A  Distribution SystemHAA5 & TTHM  Yearly01/01/200412/31/20131Sample between June 1 and Sept. 30.
DIST-A  Distribution SystemLEAD & COPPER  3 Years01/01/200212/31/20235Sample Between June 1st and Sept 30th
DIST-A  Distribution SystemSTAGE 2 DBP  Quarterly01/01/201512/31/20211Increased monitoring due to results over the MCL for TTHM. Collect one dual sample set every quarter.
DIST-A  Distribution SystemSTAGE 2 DBP  Yearly01/01/201412/31/20141Sample in August
DIST-A  Distribution SystemSTAGE 2 DBP  Yearly01/01/202209/30/20241Collect one dual sample set every August at 5600 Alder Ct.
EP-A  EP FOR WOAHINK LAKEARSENIC  Yearly01/01/200212/31/20081
EP-A  EP FOR WOAHINK LAKEIOC  Yearly01/01/200212/31/20041
EP-A  EP FOR WOAHINK LAKENITRITE  3 Years01/01/200212/31/20041
SRC-AA  WOAHINK LAKECYANOTOXINS  2 Weeks07/15/201801/24/20191

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More information for this water system: SDWIS ID 3954
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