| 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-A COMMON HEADER FOR WTP-A | TOC & ALKALINITY | Quarterly | 01/01/2026 - 03/31/2026 | 72 | 1 | incomplete | 10/21/2025 | ||||
| DIST-A Distribution System | ASBESTOS, DIST | notes | 9 Years | 01/01/2020 - 12/31/2028 | 1,078 | 1 | done | 11/16/2022 | |||
| DIST-A Distribution System | LEAD & COPPER | notes | 3 Years | 01/01/2028 - 12/31/2028 | 10 | 07/31/2025 | |||||
| Seasonal sampling period: 06/01 thru 09/30 | |||||||||||
| DIST-A Distribution System | STAGE 2 DBP | notes | Quarterly | 01/01/2026 - 03/31/2026 | 72 | 1 | incomplete | 10/21/2025 | |||
| EP-A EP FOR COLUMBIA RIVER | ARSENIC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 1,078 | 1 | done | 11/16/2022 | |||
| EP-A EP FOR COLUMBIA RIVER | IOC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 1,078 | 1 | done | 11/16/2022 | |||
| EP-A EP FOR COLUMBIA RIVER | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 347 | 1 | incomplete | 07/24/2025 | ||||
| EP-A EP FOR COLUMBIA RIVER | NITRITE | notes | 9 Years | 01/01/2020 - 12/31/2028 | 1,078 | 1 | done | 11/16/2022 | |||
| EP-A EP FOR COLUMBIA RIVER | RAD - GROSS ALPHA | notes | 9 Years | 01/01/2026 - 12/31/2034 | 3,269 | 1 | incomplete | 11/16/2022 | |||
| EP-A EP FOR COLUMBIA RIVER | RAD - RADIUM 226/228 | notes | 9 Years | 01/01/2023 - 12/31/2031 | 2,173 | 1 | incomplete | 11/16/2022 | |||
| EP-A EP FOR COLUMBIA RIVER | RAD - URANIUM | 9 Years | 01/01/2023 - 12/31/2031 | 2,173 | 1 | incomplete | 11/16/2022 | ||||
| EP-A EP FOR COLUMBIA RIVER | SOC | 3 Years | 01/01/2026 - 12/31/2028 | 1,078 | 1 | incomplete | 10/12/2021 | ||||
| EP-A EP FOR COLUMBIA RIVER | VOLATILE ORGANICS | notes | Yearly | 01/01/2026 - 12/31/2026 | 347 | 1 | incomplete | 01/24/2025 | |||
| SRC-AB COLUMBIA RIVER | CYANOTOXINS | 2 Weeks | -- | -- | -- | -- | -- | 10/24/2025 | |||
| Seasonal sampling period: 05/01 thru 10/31 | |||||||||||
| WTP-A TP FOR COLUMBIA RIVER | TOTAL ORGANIC CARBON | Quarterly | 01/01/2026 - 03/31/2026 | 72 | 1 | incomplete | 10/21/2025 | ||||
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