| 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 | 6 | 1 | incomplete | 02/03/2026 | |||
| DIST-A Distribution System | LEAD & COPPER | notes | 3 Years | 01/01/2027 - 12/31/2027 | 10 | 09/25/2024 | |||||
| Seasonal sampling period: 06/01 thru 09/30 | |||||||||||
| DIST-A Distribution System | STAGE 2 DBP | notes | Quarterly | 04/01/2026 - 06/30/2026 | 67 | 1 | incomplete | 01/06/2026 | |||
| EP-A EP for WILLAMETTE RIVER | ARSENIC | notes | 9 Years | 01/01/2023 - 12/31/2031 | 2,077 | 1 | incomplete | 08/30/2022 | |||
| EP-A EP for WILLAMETTE RIVER | IOC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 982 | 1 | done | 08/30/2022 | |||
| EP-A EP for WILLAMETTE RIVER | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 251 | 1 | incomplete | 11/11/2025 | ||||
| EP-A EP for WILLAMETTE RIVER | NITRITE | notes | 9 Years | 01/01/2020 - 12/31/2028 | 982 | 1 | done | 08/30/2022 | |||
| EP-A EP for WILLAMETTE RIVER | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 67 | 1 | incomplete | 12/02/2025 | |||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-A EP for WILLAMETTE RIVER | SOC | 3 Years | 01/01/2026 - 12/31/2028 | 982 | 1 | incomplete | 10/22/2024 | ||||
| EP-A EP for WILLAMETTE RIVER | VOLATILE ORGANICS | Yearly | 01/01/2026 - 12/31/2026 | 251 | 1 | incomplete | 11/11/2025 | ||||
4 secs | |||||||||||
| Expired Schedules | |||||||||
| Facility ID |
Analyte or Group | Sampling Interval |
Start | End | Samples Required |
Notes | |||
| DIST-A Distribution System | HAA5 & TTHM | Quarterly | 01/01/2004 | 09/30/2013 | 1 | Schedule Reflects 1 RT Sample Per QT Per WTP | |||
| EP-A EP for WILLAMETTE RIVER | ARSENIC | Yearly | 01/01/2002 | 12/31/2014 | 1 | ||||
| EP-A EP for WILLAMETTE RIVER | VOLATILE ORGANICS | Yearly | 01/01/2002 | 12/31/2006 | 1 | ||||
| EP-A EP for WILLAMETTE RIVER | XYLENES, TOTAL | Quarterly | 01/01/2006 | 12/31/2006 | 1 | ||||
| SRC-AA WILLAMETTE RIVER | CYANOTOXINS | 2 Weeks | 07/15/2018 | 01/24/2019 | 1 | ||||