| 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 | 04/01/2026 - 06/30/2026 | 80 | 1 | incomplete | 01/14/2026 | ||||
| DIST-A Distribution System | ASBESTOS, DIST | 9 Years | 01/01/2026 - 12/31/2034 | 3,186 | 1 | incomplete | 10/10/2019 | ||||
| DIST-A Distribution System | LEAD & COPPER | notes | 3 Years | 01/01/2028 - 12/31/2028 | 10 | 09/04/2025 | |||||
| Seasonal sampling period: 06/01 thru 09/30 | |||||||||||
| DIST-A Distribution System | STAGE 2 DBP | notes | Yearly | 01/01/2026 - 12/31/2026 | 264 | 1 | incomplete | 10/15/2025 | |||
| Seasonal sampling period: 10/01 thru 10/31 | |||||||||||
| EP-A EP FOR WILLAMINA CREEK | ARSENIC | 9 Years | 01/01/2020 - 12/31/2028 | 995 | 1 | done | 01/28/2020 | ||||
| EP-A EP FOR WILLAMINA CREEK | IOC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 995 | 1 | done | 01/28/2020 | |||
| EP-A EP FOR WILLAMINA CREEK | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 264 | 1 | done | 01/14/2026 | ||||
| EP-A EP FOR WILLAMINA CREEK | NITRITE | notes | 9 Years | 01/01/2020 - 12/31/2028 | 995 | 1 | done | 01/28/2020 | |||
| EP-A EP FOR WILLAMINA CREEK | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 80 | 1 | incomplete | ||||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-A EP FOR WILLAMINA CREEK | RAD - GROSS ALPHA | notes | 9 Years | 01/01/2023 - 12/31/2031 | 2,090 | 1 | incomplete | 01/28/2020 | |||
| EP-A EP FOR WILLAMINA CREEK | RAD - RADIUM 226/228 | notes | 9 Years | 01/01/2026 - 12/31/2034 | 3,186 | 1 | incomplete | 01/28/2014 | |||
| EP-A EP FOR WILLAMINA CREEK | RAD - URANIUM | notes | 9 Years | 01/01/2023 - 12/31/2031 | 2,090 | 1 | incomplete | 01/28/2020 | |||
| EP-A EP FOR WILLAMINA CREEK | SOC | 3 Years | 01/01/2026 - 12/31/2028 | 995 | 1 | incomplete | 02/13/2023 | ||||
| EP-A EP FOR WILLAMINA CREEK | VOLATILE ORGANICS | Yearly | 01/01/2026 - 12/31/2026 | 264 | 1 | incomplete | 03/05/2025 | ||||
| WTP-A TP FOR WILLAMINA CREEK | TOTAL ORGANIC CARBON | Quarterly | 04/01/2026 - 06/30/2026 | 80 | 1 | incomplete | 01/14/2026 | ||||
5 secs | |||||||||||
| Expired Schedules | |||||||||
| Facility ID |
Analyte or Group | Sampling Interval |
Start | End | Samples Required |
Notes | |||
| CH-A COMMON HEADER FOR WTP-A | TOC & ALKALINITY | Monthly | 01/01/2004 | 12/31/2005 | 1 | Raw and filtered TOC and alkalinity | |||
| DIST-A Distribution System | ASBESTOS, DIST | 3 Years | 01/01/2002 | 12/31/2007 | 1 | ||||
| DIST-A Distribution System | HAA5 & TTHM | Quarterly | 01/01/2004 | 12/31/2004 | 1 | Schedule Reflects 1 RT Sample Per QT Per WTP | |||
| DIST-A Distribution System | HAA5 & TTHM | Yearly | 01/01/2005 | 09/30/2013 | 1 | Sample between June 1 and Sept. 30. | |||
| DIST-A Distribution System | LEAD & COPPER | Yearly | 01/01/2002 | 12/31/2002 | 10 | Sample Between June 1st and Sept 30th | |||
| DIST-A Distribution System | STAGE 2 DBP | Quarterly | 10/01/2013 | 12/31/2016 | 1 | Sample in Oct, Jan, Apr, and July | |||
| EP-A EP FOR WILLAMINA CREEK | ARSENIC | Yearly | 01/01/2002 | 12/31/2010 | 1 | ||||
| EP-A EP FOR WILLAMINA CREEK | RAD - GROSS ALPHA | 6 Years | 01/01/2017 | 12/31/2022 | 1 | ||||
| EP-A EP FOR WILLAMINA CREEK | RAD - GROSS ALPHA | 9 Years | 01/01/2014 | 12/31/2016 | 1 | Schedule Reflects Monitoring Reduction Granted | |||
| EP-A EP FOR WILLAMINA CREEK | RAD - GROSS ALPHA | Quarterly | 01/01/2010 | 03/31/2011 | 1 | ||||
| EP-A EP FOR WILLAMINA CREEK | RAD - RADIUM 226/228 | 6 Years | 01/01/2014 | 12/31/2016 | 1 | ||||
| EP-A EP FOR WILLAMINA CREEK | RAD - RADIUM 226/228 | Quarterly | 01/01/2010 | 03/31/2011 | 1 | ||||
| EP-A EP FOR WILLAMINA CREEK | RAD - URANIUM | Quarterly | 01/01/2010 | 03/31/2011 | 1 | ||||
| SRC-AA WILLAMINA CREEK | CYANOTOXINS | 2 Weeks | 07/15/2018 | 01/24/2019 | 1 | ||||
| WTP-A TP FOR WILLAMINA CREEK | TOTAL ORGANIC CARBON | Monthly | 01/01/2004 | 12/31/2005 | 1 | Post Filtration TOC | |||