| 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 | TOTAL ORGANIC CARBON | notes | Monthly | 04/01/2026 - 04/30/2026 | 5 | 1 | incomplete | 09/08/2025 | |||
| DIST-A Distribution System | ASBESTOS, DIST | notes | 9 Years | 01/01/2020 - 12/31/2028 | 981 | 1 | done | 11/30/2020 | |||
| DIST-A Distribution System | LEAD & COPPER | notes | Yearly | 01/01/2026 - 12/31/2026 | 250 | 10 | incomplete | 06/10/2025 | |||
| Seasonal sampling period: 06/01 thru 09/30 | |||||||||||
| DIST-A Distribution System | STAGE 2 DBP | notes | Quarterly | 04/01/2026 - 06/30/2026 | 66 | 1 | incomplete | 02/05/2026 | |||
| EP-A EP FOR COLUMBIA RIVER | SODIUM | notes | Yearly | 01/01/2026 - 12/31/2026 | 250 | 1 | incomplete | 09/05/2025 | |||
| EP-A EP FOR COLUMBIA RIVER | XYLENES, TOTAL | notes | Yearly | 01/01/2026 - 12/31/2026 | 250 | 1 | incomplete | 11/06/2025 | |||
| Seasonal sampling period: 07/01 thru 09/30 | |||||||||||
| EP-A EP FOR COLUMBIA RIVER | ARSENIC | notes | 9 Years | 01/01/2023 - 12/31/2031 | 2,076 | 1 | incomplete | 05/26/2020 | |||
| EP-A EP FOR COLUMBIA RIVER | IOC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 981 | 1 | done | 05/26/2020 | |||
| EP-A EP FOR COLUMBIA RIVER | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 250 | 1 | incomplete | 09/05/2025 | ||||
| EP-A EP FOR COLUMBIA RIVER | NITRITE | notes | 9 Years | 01/01/2020 - 12/31/2028 | 981 | 1 | done | 05/26/2020 | |||
| EP-A EP FOR COLUMBIA RIVER | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 66 | 1 | incomplete | ||||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-A EP FOR COLUMBIA RIVER | SOC | 3 Years | 01/01/2026 - 12/31/2028 | 981 | 1 | incomplete | 09/05/2025 | ||||
| EP-A EP FOR COLUMBIA RIVER | VOLATILE ORGANICS | Yearly | 01/01/2026 - 12/31/2026 | 250 | 1 | incomplete | 11/06/2025 | ||||
| SRC-AA COLUMBIA RIVER | CYANOTOXINS | 2 Weeks | 04/19/2026 - 05/02/2026 | 7 | 1 | incomplete | |||||
| Seasonal sampling period: 05/01 thru 10/31 | |||||||||||
5 secs | |||||||||||