OHA Drinking Water Services
OR41
PWS ID: 00368 ---- HELIX, CITY OF

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 Years01/01/2025 - 12/31/2025   5 07/28/2022
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notes3 Years01/01/2026 - 12/31/2026   1  07/18/2023
 Seasonal sampling period:  07/01  thru  07/31
EP-A  EP FOR WELL #4 ARSENIC notes9 Years01/01/2023 - 12/31/2031 2,807 1 incomplete10/23/2019
EP-A  EP FOR WELL #4 IOC notes9 Years01/01/2020 - 12/31/2028 1,712 1 incomplete10/23/2019
EP-A  EP FOR WELL #4 NITRATE  Yearly01/01/2024 - 12/31/2024 251 1 incomplete11/10/2022
EP-A  EP FOR WELL #4 NITRITE notes9 Years01/01/2020 - 12/31/2028 1,712 1 incomplete10/23/2019
EP-A  EP FOR WELL #4 RAD - GROSS ALPHA  9 Years01/01/2017 - 12/31/2025 616 1 done 10/23/2019
EP-A  EP FOR WELL #4 RAD - RADIUM 226/228 9 Years01/01/2023 - 12/31/2031 2,807 1 incomplete10/23/2019
EP-A  EP FOR WELL #4 RAD - URANIUM  9 Years01/01/2017 - 12/31/2025 616 1 done 10/23/2019
EP-A  EP FOR WELL #4 SOC  3 Years01/01/2023 - 12/31/2025 616 1 incomplete11/10/2022
EP-A  EP FOR WELL #4 VOLATILE ORGANICS  3 Years01/01/2023 - 12/31/2025 616 1 incomplete11/10/2022

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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Yearly01/01/202212/31/20222Collect two dual samples sets in july 2022 for IDSE purposes, one at the location with highest expected HAA5 and one at the location expected to have highest TTHM concentrations.
EP-A  EP FOR WELL #4ARSENIC  3 Years01/01/200212/31/20131
EP-A  EP FOR WELL #4RAD - RADIUM 226/228  6 Years01/01/201712/31/20221
EP-A  EP FOR WELL #4RAD - RADIUM 226/228  9 Years01/01/200812/31/20161

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More information for this water system: SDWIS ID 3728
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