| 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 | notes | Monthly | 05/01/2026 - 05/31/2026 | 30 | 1 | incomplete | 03/10/2026 | |||
| DIST-A DISTRIBUTION SYSTEM | STAGE 2 DBP | notes | Yearly | 01/01/2026 - 12/31/2026 | 244 | 1 | incomplete | 08/12/2025 | |||
| Seasonal sampling period: 08/01 thru 08/31 | |||||||||||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | ARSENIC | 9 Years | 01/01/2026 - 12/31/2034 | 3,166 | 1 | done | 02/18/2026 | ||||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | IOC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 975 | 1 | done | 02/18/2026 | |||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 244 | 1 | done | 02/18/2026 | ||||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | NITRITE | notes | 9 Years | 01/01/2020 - 12/31/2028 | 975 | 1 | done | 02/18/2026 | |||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 60 | 1 | incomplete | 10/14/2025 | |||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | RAD - GROSS ALPHA | 9 Years | 01/01/2026 - 12/31/2034 | 3,166 | 1 | incomplete | 11/10/2020 | ||||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | RAD - RADIUM 226/228 | 9 Years | 01/01/2023 - 12/31/2031 | 2,070 | 1 | incomplete | 11/10/2020 | ||||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | RAD - URANIUM | 9 Years | 01/01/2026 - 12/31/2034 | 3,166 | 1 | incomplete | 11/10/2020 | ||||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | SOC | notes | 3 Years | 01/01/2026 - 12/31/2028 | 975 | 2 | incomplete | 09/13/2023 | |||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | VOLATILE ORGANICS | Yearly | 01/01/2026 - 12/31/2026 | 244 | 1 | incomplete | 07/08/2025 | ||||
| SRC-AA CLACKAMAS RIVER | CYANOTOXINS | 2 Weeks | 04/19/2026 - 05/02/2026 | 1 | 1 | incomplete | 08/15/2022 | ||||
| Seasonal sampling period: 05/01 thru 10/31 | |||||||||||
| WTP-A TP FOR CLACKAMAS RIVER | TOTAL ORGANIC CARBON | notes | Monthly | 05/01/2026 - 05/31/2026 | 30 | 1 | incomplete | 03/10/2026 | |||
5 secs | |||||||||||
| Expired Schedules | |||||||||
| Facility ID |
Analyte or Group | Sampling Interval |
Start | End | Samples Required |
Notes | |||
| DIST-A DISTRIBUTION SYSTEM | HAA5 & TTHM | Quarterly | 01/01/2002 | 06/30/2008 | 4 | Reflects 4 RT Samples Per QT Per WTP | |||
| DIST-A DISTRIBUTION SYSTEM | LEAD & COPPER | 6 Months | 08/01/2005 | 06/30/2006 | 60 | Schedule Reflects OR City S. Fork WB Joint Monitoring Plan | |||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | ARSENIC | Yearly | 01/01/2002 | 12/31/2007 | 1 | ||||
| EP-A EP FOR WTP FOR CLACKAMAS RIVER | RAD - RADIUM 226/228 | 6 Years | 01/01/2008 | 12/31/2013 | 1 | ||||