OHA Drinking Water Services
OR41
PWS ID: 94901 ---- RIVERSIDE HIGH SCHOOL

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   10incomplete06/26/2022
  Seasonal sampling period:   06/01   thru   09/30
EP-A  EP FOR WELL #1 ARSENIC  9 Years 01/01/2023 - 12/31/2031 2,104 1 incomplete10/28/2019
EP-A  EP FOR WELL #1 IOC notes9 Years 01/01/2020 - 12/31/2028 1,009 1 incomplete10/28/2019
EP-A  EP FOR WELL #1 NITRATE  Yearly 01/01/2026 - 12/31/2026 278 1 incomplete08/29/2025
EP-A  EP FOR WELL #1 NITRITE notes9 Years 01/01/2020 - 12/31/2028 1,009 1 incomplete10/28/2019
EP-A  EP FOR WELL #1 PFAS notes6 Months01/01/2026 - 06/30/2026 94 1 done 01/07/2026
  Initial monitoring - 2 samples only
EP-A  EP FOR WELL #1 SOC  3 Years 01/01/2026 - 12/31/2028 1,009 1 incomplete08/29/2025
EP-A  EP FOR WELL #1 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,009 1 incomplete08/29/2025

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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  Yearly01/01/200212/31/200310Sample Between June 1st and Sept 30th
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Yearly01/01/201412/23/20232Sample in June
EP-A  EP FOR WELL #1ARSENIC  3 Years01/01/200212/31/20131

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