OHA Drinking Water Services
OR41
PWS ID: 00839 ---- RAINBOW WATER DISTRICT

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-B  COMMON HEADER FOR WTP-BTOTAL ORGANIC CARBON Quarterly04/01/2026 - 06/30/2026 82 1 incomplete 04/11/2023
DIST-A  DISTRIBUTION SYSTEM ASBESTOS, DIST notes9 Years01/01/2020 - 12/31/2028 997 1 done 10/17/2023
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2027 - 12/31/2027   20 06/20/2024
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesYearly 01/01/2026 - 12/31/2026 266 2 incomplete08/12/2025
  Seasonal sampling period:   08/01   thru   08/31
EP-A  EP FOR I-5 WELLS #1 & #2 ARSENIC notes9 Years 01/01/2023 - 12/31/2031 2,092 1 incomplete07/13/2021
EP-A  EP FOR I-5 WELLS #1 & #2 IOC notes9 Years01/01/2020 - 12/31/2028 997 1 done 07/13/2021
EP-A  EP FOR I-5 WELLS #1 & #2 NITRATE  Yearly 01/01/2026 - 12/31/2026 266 1 incomplete06/17/2025
EP-A  EP FOR I-5 WELLS #1 & #2 NITRITE notes9 Years01/01/2020 - 12/31/2028 997 1 done 07/13/2021
EP-A  EP FOR I-5 WELLS #1 & #2 PFAS notes6 Months 01/01/2026 - 06/30/2026 82 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP FOR I-5 WELLS #1 & #2 RAD - GROSS ALPHA  9 Years 01/01/2026 - 12/31/2034 3,188 1 incomplete07/13/2021
EP-A  EP FOR I-5 WELLS #1 & #2 RAD - RADIUM 226/228 9 Years 01/01/2026 - 12/31/2034 3,188 1 incomplete07/13/2021
EP-A  EP FOR I-5 WELLS #1 & #2 RAD - URANIUM  9 Years 01/01/2023 - 12/31/2031 2,092 1 incomplete07/13/2021
EP-A  EP FOR I-5 WELLS #1 & #2 SOC notes6 Years 01/01/2026 - 12/31/2031 2,092 1 incomplete06/25/2024
EP-A  EP FOR I-5 WELLS #1 & #2 VOLATILE ORGANICS notes6 Years 01/01/2026 - 12/31/2031 2,092 1 incomplete06/25/2024
EP-B  EP FOR CHASE WELLS ARSENIC notes9 Years 01/01/2023 - 12/31/2031 2,092 1 incomplete07/13/2021
EP-B  EP FOR CHASE WELLS IOC notes9 Years01/01/2020 - 12/31/2028 997 1 done 07/13/2021
EP-B  EP FOR CHASE WELLS NITRATE  Yearly 01/01/2026 - 12/31/2026 266 1 incomplete06/17/2025
EP-B  EP FOR CHASE WELLS NITRITE notes9 Years01/01/2020 - 12/31/2028 997 1 done 07/13/2021
EP-B  EP FOR CHASE WELLS PFAS notes6 Months 01/01/2026 - 06/30/2026 82 1 incomplete
  Initial monitoring - 2 samples only
EP-B  EP FOR CHASE WELLS RAD - GROSS ALPHA  9 Years 01/01/2026 - 12/31/2034 3,188 1 incomplete07/13/2021
EP-B  EP FOR CHASE WELLS RAD - RADIUM 226/228 9 Years 01/01/2026 - 12/31/2034 3,188 1 incomplete07/13/2021
EP-B  EP FOR CHASE WELLS RAD - URANIUM  9 Years 01/01/2023 - 12/31/2031 2,092 1 incomplete07/13/2021
EP-B  EP FOR CHASE WELLS SOC notes6 Years 01/01/2026 - 12/31/2031 2,092 1 incomplete10/11/2022
EP-B  EP FOR CHASE WELLS VOLATILE ORGANICS notes6 Years 01/01/2026 - 12/31/2031 2,092 1 incomplete10/11/2022
EP-C  EP FOR Q ST. WELL ARSENIC notes9 Years 01/01/2023 - 12/31/2031 2,092 1 incomplete07/13/2021
EP-C  EP FOR Q ST. WELL IOC notes9 Years01/01/2020 - 12/31/2028 997 1 done 07/13/2021
EP-C  EP FOR Q ST. WELL NITRATE  Yearly 01/01/2026 - 12/31/2026 266 1 incomplete06/17/2025
EP-C  EP FOR Q ST. WELL NITRITE notes9 Years01/01/2020 - 12/31/2028 997 1 done 07/13/2021
EP-C  EP FOR Q ST. WELL PFAS notes6 Months 01/01/2026 - 06/30/2026 82 1 incomplete
  Initial monitoring - 2 samples only
EP-C  EP FOR Q ST. WELL RAD - GROSS ALPHA  9 Years 01/01/2026 - 12/31/2034 3,188 1 incomplete07/13/2021
EP-C  EP FOR Q ST. WELL RAD - RADIUM 226/228 9 Years 01/01/2026 - 12/31/2034 3,188 1 incomplete07/13/2021
EP-C  EP FOR Q ST. WELL RAD - URANIUM  9 Years 01/01/2023 - 12/31/2031 2,092 1 incomplete07/13/2021
EP-C  EP FOR Q ST. WELL SOC notes6 Years 01/01/2026 - 12/31/2031 2,092 1 incomplete05/02/2023
EP-C  EP FOR Q ST. WELL VOLATILE ORGANICS notes6 Years 01/01/2026 - 12/31/2031 2,092 1 incomplete05/02/2023
SRC-BB  CHASE WELL #2 CYANOTOXINS  2 Weeks-- -- -- -- --10/27/2025
  Seasonal sampling period:   05/01   thru   10/31

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