OHA Drinking Water Services
PWS ID: 00379 ---- JOINT WATER COMMISSION
| Chemical Sampling Schedule Status | |||||||||||
| Facility ID |
Analyte or Group | Sampling Interval |
Monitoring Period | Days Until End |
Samples Required |
Samples Received |
Last Sample Date |
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|---|---|---|---|---|---|---|---|---|---|---|---|
| Start | End | ||||||||||
| CH-A COMMON HEADER FOR WTP-A | TOC & ALKALINITY | notes | Quarterly | 04/01/2021 - 06/30/2021 | 18 | 1 | done | 05/04/2021 | |||
| DIST-A DISTRIBUTION SYSTEM | STAGE 2 DBP | notes | Yearly | 01/01/2021 - 12/31/2021 | 202 | 1 | incomplete | 07/09/2020 | |||
| Seasonal sampling period: 07/01 thru 07/31 | |||||||||||
| EP-A EP FOR TUALATIN RIVER | HEXACHLOROCYCLOPENTADIENE | notes | Yearly | 01/01/2021 - 12/31/2021 | 202 | 1 | done | 04/07/2021 | |||
| Seasonal sampling period: 10/01 thru 12/31 | |||||||||||
| EP-A EP FOR TUALATIN RIVER | ARSENIC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 2,759 | 1 | done | 04/07/2021 | |||
| EP-A EP FOR TUALATIN RIVER | IOC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 2,759 | 1 | done | 04/07/2021 | |||
| EP-A EP FOR TUALATIN RIVER | NITRATE | Yearly | 01/01/2021 - 12/31/2021 | 202 | 1 | done | 04/07/2021 | ||||
| EP-A EP FOR TUALATIN RIVER | NITRITE | notes | 9 Years | 01/01/2020 - 12/31/2028 | 2,759 | 1 | done | 04/07/2021 | |||
| EP-A EP FOR TUALATIN RIVER | RAD - GROSS ALPHA | notes | 9 Years | 01/01/2017 - 12/31/2025 | 1,663 | 1 | done | 04/07/2021 | |||
| EP-A EP FOR TUALATIN RIVER | RAD - RADIUM 226/228 | 9 Years | 01/01/2014 - 12/31/2022 | 567 | 1 | done | 04/07/2021 | ||||
| EP-A EP FOR TUALATIN RIVER | RAD - URANIUM | notes | 9 Years | 01/01/2017 - 12/31/2025 | 1,663 | 1 | done | 04/07/2021 | |||
| EP-A EP FOR TUALATIN RIVER | SOC | notes | 3 Years | 01/01/2020 - 12/31/2022 | 567 | 2 | done | 04/07/2021 | |||
| EP-A EP FOR TUALATIN RIVER | VOLATILE ORGANICS | Yearly | 01/01/2021 - 12/31/2021 | 202 | 1 | done | 04/07/2021 | ||||
| SRC-AA TUALATIN RIVER | CYANOTOXINS | 2 Weeks | 05/30/2021 - 06/12/2021 | 0 | 1 | done | 06/01/2021 | ||||
| Seasonal sampling period: 05/01 thru 10/31 | |||||||||||
| WTP-A TP FOR TUALATIN RIVER | TOTAL ORGANIC CARBON | notes | Monthly | 06/01/2021 - 06/30/2021 | 18 | 1 | incomplete | 05/04/2021 | |||
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