OHA Drinking Water Services
OR41
PWS ID: 00724 ---- ST HELENS, 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-ATOTAL ORGANIC CARBON Quarterly04/01/2026 - 06/30/2026 72 1 incomplete 02/04/2026
CH-A  COMMON HEADER FOR WTP-A CYANOTOXINS  2 Weeks 04/19/2026 - 05/02/2026 13 1 incomplete10/27/2025
  Seasonal sampling period:   05/01   thru   10/31
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2028 - 12/31/2028   30 08/28/2025
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 04/01/2026 - 06/30/2026 72 2 incomplete02/04/2026
EP-A  EP FOR RANNEY COLLECTORS ARSENIC notes9 Years 01/01/2026 - 12/31/2034 3,178 1 incomplete09/15/2021
EP-A  EP FOR RANNEY COLLECTORS IOC notes9 Years01/01/2020 - 12/31/2028 987 1 done 09/15/2021
EP-A  EP FOR RANNEY COLLECTORS NITRATE  Yearly 01/01/2026 - 12/31/2026 256 1 incomplete06/18/2025
EP-A  EP FOR RANNEY COLLECTORS NITRITE notes9 Years01/01/2020 - 12/31/2028 987 1 done 09/15/2021
EP-A  EP FOR RANNEY COLLECTORS PFAS notesQuarterly 04/01/2026 - 06/30/2026 72 1 incomplete
  Initial monitoring - 4 quarters only
EP-A  EP FOR RANNEY COLLECTORS RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,178 1 incomplete09/15/2021
EP-A  EP FOR RANNEY COLLECTORS RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,178 1 incomplete09/15/2021
EP-A  EP FOR RANNEY COLLECTORS RAD - URANIUM notes9 Years01/01/2020 - 12/31/2028 987 1 done 09/15/2021
EP-A  EP FOR RANNEY COLLECTORS SOC notes3 Years 01/01/2026 - 12/31/2028 987 2 incomplete10/18/2023
EP-A  EP FOR RANNEY COLLECTORS VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 256 1 incomplete06/18/2025

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