OHA Drinking Water Services
OR41
PWS ID: 00534 ---- MOLALLA, CITY OF

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
CH-A  COMMON HEADER FOR WTP-A TOC & ALKALINITY notesQuarterly 01/01/2026 - 03/31/2026 15 1 incomplete08/13/2025
DIST-A  DISTRIBUTION SYSTEM ASBESTOS, DIST notes9 Years01/01/2020 - 12/31/2028 1,021 1 done 11/17/2020
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2027 - 12/31/2027   30 07/10/2024
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 01/01/2026 - 03/31/2026 15 2 incomplete11/04/2025
EP-A  EP FOR MOLALLA RIVER ARSENIC notes9 Years 01/01/2026 - 12/31/2034 3,212 1 incomplete05/06/2025
EP-A  EP FOR MOLALLA RIVER IOC notes9 Years01/01/2020 - 12/31/2028 1,021 1 done 05/06/2025
EP-A  EP FOR MOLALLA RIVER NITRATE  Yearly 01/01/2026 - 12/31/2026 290 1 incomplete05/06/2025
EP-A  EP FOR MOLALLA RIVER NITRITE notes9 Years01/01/2020 - 12/31/2028 1,021 1 done 05/06/2025
EP-A  EP FOR MOLALLA RIVER RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,212 1 incomplete11/12/2019
EP-A  EP FOR MOLALLA RIVER RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,212 1 incomplete11/12/2019
EP-A  EP FOR MOLALLA RIVER RAD - URANIUM notes9 Years 01/01/2026 - 12/31/2034 3,212 1 incomplete11/12/2019
EP-A  EP FOR MOLALLA RIVER SOC notes3 Years 01/01/2026 - 12/31/2028 1,021 2 incomplete10/08/2024
EP-A  EP FOR MOLALLA RIVER VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 290 1 incomplete08/13/2025
WTP-A  TP FOR MOLALLA RIVERTOTAL ORGANIC CARBONnotesQuarterly01/01/2026 - 03/31/2026 15 1 incomplete 08/13/2025

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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
CH-A  COMMON HEADER FOR WTP-ATOC & ALKALINITY  Monthly01/01/200412/31/20041Raw and filtered TOC and alkalinity
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly01/01/200412/31/20041Schedule Reflects 1 RT Sample Per QT Per WTP
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Yearly01/01/200509/30/20131Sample between June 1 and Sept. 30.
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  3 Years01/01/200212/31/202120Sample Between June 1st and Sept 30th
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Quarterly01/01/201909/30/20202Sample in Nov, Feb, May, and August at 12424 Toliver Rd. & 921 Meadowlawn Pl.
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Quarterly10/01/201312/31/20182Sample in Nov, Feb, May, and August
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Yearly01/01/202112/31/20212Sample in August at 1424 Toliver Road (2DBP-01) and 921 Meadowlawn (2DBP-03)
EP-A  EP FOR MOLALLA RIVERPFAS  Quarterly01/01/202312/31/20231
WTP-A  TP FOR MOLALLA RIVERTOTAL ORGANIC CARBON  Monthly01/01/200412/31/20041Post Filtration TOC

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More information for this water system: SDWIS ID 3971
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