OHA Drinking Water Services
OR41
PWS ID: 00632 ---- RIVERSIDE WATER DISTRICT

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   5incomplete09/21/2023
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notes3 Years01/01/2026 - 12/31/2026   1incomplete09/18/2023
  Seasonal sampling period:   06/01   thru   09/30
EP-A  EP for SPRING (UNNAMED) ARSENIC notes9 Years01/01/2020 - 12/31/2028 987 1 done 07/28/2025
EP-A  EP for SPRING (UNNAMED) IOC notes9 Years01/01/2020 - 12/31/2028 987 1 done 07/28/2025
EP-A  EP for SPRING (UNNAMED) NITRATE  Yearly 01/01/2026 - 12/31/2026 256 1 incomplete07/28/2025
EP-A  EP for SPRING (UNNAMED) NITRITE notes9 Years01/01/2020 - 12/31/2028 987 1 done 07/28/2025
EP-A  EP for SPRING (UNNAMED) PFAS notes6 Months 01/01/2026 - 06/30/2026 72 1 incomplete11/20/2025
  Initial monitoring - 2 samples only
EP-A  EP for SPRING (UNNAMED) RAD - GROSS ALPHA  9 Years 01/01/2026 - 12/31/2034 3,178 1 incomplete11/28/2022
EP-A  EP for SPRING (UNNAMED) RAD - RADIUM 226/228 9 Years01/01/2023 - 12/31/2031 2,082 1 done 07/28/2025
EP-A  EP for SPRING (UNNAMED) RAD - URANIUM  9 Years 01/01/2026 - 12/31/2034 3,178 1 incomplete11/28/2022
EP-A  EP for SPRING (UNNAMED) SOC  3 Years 01/01/2026 - 12/31/2028 987 1 incomplete07/28/2025
EP-A  EP for SPRING (UNNAMED) VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 987 1 incomplete07/28/2025

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Expired Schedules
Facility
ID
Analyte or Group    Sampling
Interval
Start End Samples
Required
   Notes
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 IDSE  Yearly01/01/201609/30/20202Collect two dual sample sets between June 1 and September 30.
EP-A  EP for SPRING (UNNAMED)ARSENIC  3 Years01/01/200212/31/20101
EP-A  EP for SPRING (UNNAMED)RAD - RADIUM 226/228  6 Years01/01/200812/31/20131

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