| 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 CH FOR CLACKAMAS RIVER | TOC & ALKALINITY | Quarterly | 01/01/2026 - 03/31/2026 | 2 | 1 | done | 02/12/2026 | ||||
| DIST-A DISTRIBUTION SYSTEM | STAGE 2 DBP | notes | Yearly | 01/01/2026 - 12/31/2026 | 277 | 1 | incomplete | ||||
| Seasonal sampling period: 07/01 thru 07/31 | |||||||||||
| EP-A EP FOR CLACKAMAS RIVER | BROMATE | Quarterly | 01/01/2026 - 03/31/2026 | 2 | 1 | done | 02/12/2026 | ||||
| EP-A EP FOR CLACKAMAS RIVER | ARSENIC | 9 Years | 01/01/2026 - 12/31/2034 | 3,199 | 1 | incomplete | 06/11/2024 | ||||
| EP-A EP FOR CLACKAMAS RIVER | IOC | 9 Years | 01/01/2020 - 12/31/2028 | 1,008 | 1 | done | 06/11/2024 | ||||
| EP-A EP FOR CLACKAMAS RIVER | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 277 | 1 | incomplete | 06/11/2025 | ||||
| EP-A EP FOR CLACKAMAS RIVER | NITRITE | 9 Years | 01/01/2020 - 12/31/2028 | 1,008 | 1 | done | 06/11/2024 | ||||
| EP-A EP FOR CLACKAMAS RIVER | PFAS | notes | Quarterly | 01/01/2026 - 03/31/2026 | 2 | 1 | done | 02/05/2026 | |||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-A EP FOR CLACKAMAS RIVER | RAD - GROSS ALPHA | 9 Years | 01/01/2026 - 12/31/2034 | 3,199 | 1 | incomplete | 06/11/2024 | ||||
| EP-A EP FOR CLACKAMAS RIVER | RAD - RADIUM 226/228 | 9 Years | 01/01/2026 - 12/31/2034 | 3,199 | 1 | incomplete | 06/11/2024 | ||||
| EP-A EP FOR CLACKAMAS RIVER | RAD - URANIUM | 9 Years | 01/01/2026 - 12/31/2034 | 3,199 | 1 | incomplete | 06/11/2024 | ||||
| EP-A EP FOR CLACKAMAS RIVER | SOC | notes | 3 Years | 01/01/2026 - 12/31/2028 | 1,008 | 2 | incomplete | 09/17/2025 | |||
| EP-A EP FOR CLACKAMAS RIVER | VOLATILE ORGANICS | Yearly | 01/01/2026 - 12/31/2026 | 277 | 1 | incomplete | 06/11/2025 | ||||
| SRC-AA CLACKAMAS RIVER | CYANOTOXINS | 2 Weeks | -- | -- | -- | -- | -- | 10/20/2025 | |||
| Seasonal sampling period: 05/01 thru 10/31 | |||||||||||
| WTP-A TP FOR CLACKAMAS RIVER | TOTAL ORGANIC CARBON | Quarterly | 01/01/2026 - 03/31/2026 | 2 | 1 | done | 02/12/2026 | ||||
6 secs | |||||||||||
| Expired Schedules | |||||||||
| Facility ID |
Analyte or Group | Sampling Interval |
Start | End | Samples Required |
Notes | |||
| CH-A CH FOR CLACKAMAS RIVER | TOC & ALKALINITY | Monthly | 01/01/2020 | 09/30/2020 | 1 | ||||
| EP-A EP FOR CLACKAMAS RIVER | BROMATE | Monthly | 01/01/2017 | 07/31/2023 | 1 | ||||
| WTP-A TP FOR CLACKAMAS RIVER | TOTAL ORGANIC CARBON | Monthly | 01/01/2020 | 09/30/2020 | 1 | ||||