| 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 | CYANOTOXINS | 2 Weeks | 04/19/2026 - 05/02/2026 | 8 | 1 | incomplete | 08/15/2022 | ||||
| Seasonal sampling period: 05/01 thru 10/31 | |||||||||||
| DIST-A Distribution System | ASBESTOS, DIST | notes | 9 Years | 01/01/2020 - 12/31/2028 | 982 | 1 | done | 01/19/2022 | |||
| DIST-A Distribution System | HAA5 & TTHM | notes | Quarterly | 04/01/2026 - 06/30/2026 | 67 | 4 | incomplete | ||||
| DIST-A Distribution System | LEAD & COPPER | notes | 3 Years | 01/01/2028 - 12/31/2028 | 30 | 08/26/2025 | |||||
| Seasonal sampling period: 06/01 thru 09/30 | |||||||||||
| EP-A EP FOR BIG CREEK/SILETZ RIVER | ARSENIC | 9 Years | 01/01/2020 - 12/31/2028 | 982 | 1 | done | 06/15/2022 | ||||
| EP-A EP FOR BIG CREEK/SILETZ RIVER | IOC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 982 | 1 | done | 06/15/2022 | |||
| EP-A EP FOR BIG CREEK/SILETZ RIVER | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 251 | 1 | incomplete | 09/10/2025 | ||||
| EP-A EP FOR BIG CREEK/SILETZ RIVER | NITRITE | notes | 9 Years | 01/01/2020 - 12/31/2028 | 982 | 1 | done | 06/15/2022 | |||
| EP-A EP FOR BIG CREEK/SILETZ RIVER | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 67 | 1 | incomplete | ||||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-A EP FOR BIG CREEK/SILETZ RIVER | RAD - GROSS ALPHA | notes | 9 Years | 01/01/2026 - 12/31/2034 | 3,173 | 1 | incomplete | 01/19/2022 | |||
| EP-A EP FOR BIG CREEK/SILETZ RIVER | RAD - RADIUM 226/228 | notes | 9 Years | 01/01/2026 - 12/31/2034 | 3,173 | 1 | incomplete | 01/19/2022 | |||
| EP-A EP FOR BIG CREEK/SILETZ RIVER | RAD - URANIUM | notes | 9 Years | 01/01/2026 - 12/31/2034 | 3,173 | 1 | incomplete | 01/19/2022 | |||
| EP-A EP FOR BIG CREEK/SILETZ RIVER | SOC | notes | 3 Years | 01/01/2026 - 12/31/2028 | 982 | 2 | incomplete | 11/15/2023 | |||
| EP-A EP FOR BIG CREEK/SILETZ RIVER | VOLATILE ORGANICS | Yearly | 01/01/2026 - 12/31/2026 | 251 | 1 | incomplete | 09/10/2025 | ||||
4 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 | 03/31/2005 | 1 | Raw and filtered TOC and alkalinity | |||
| CH-A COMMON HEADER FOR WTP-A | TOC & ALKALINITY | Quarterly | 04/01/2005 | 06/30/2018 | 1 | schedule reflects montioring reduction granted | |||
| DIST-A Distribution System | HAA5 & TTHM | Quarterly | 01/01/2004 | 12/31/2006 | 1 | Schedule Reflects 1 RT Sample Per QT Per WTP | |||
| DIST-A Distribution System | HAA5 & TTHM | Quarterly | 01/01/2008 | 09/30/2013 | 1 | One sample per WTP per QT at location of maximum residence time. | |||
| DIST-A Distribution System | HAA5 & TTHM | Yearly | 01/01/2007 | 12/31/2007 | 1 | Sample between June 1 and September 30. Schedule reflects monitoring reduction granted. | |||
| DIST-A Distribution System | LEAD & COPPER | 3 Years | 01/01/2002 | 12/31/2013 | 20 | Sample Between June 1st and Sept 30th | |||
| DIST-A Distribution System | STAGE 2 DBP | Quarterly | 01/01/2014 | 12/31/2019 | 4 | Sample in Feb, May, Aug, and Nov | |||
| DIST-A Distribution System | STAGE 2 DBP | Quarterly | 10/01/2013 | 12/31/2013 | 2 | Sample in Nov, Feb, May, and Aug | |||
| EP-A EP FOR BIG CREEK/SILETZ RIVER | ARSENIC | Yearly | 01/01/2002 | 12/31/2012 | 1 | ||||
| WTP-A TP FOR BIG CREEK/SILETZ RIVER | TOTAL ORGANIC CARBON | Monthly | 01/01/2004 | 03/31/2005 | 1 | Post Filtration TOC | |||
| WTP-A TP FOR BIG CREEK/SILETZ RIVER | TOTAL ORGANIC CARBON | Quarterly | 04/01/2005 | 12/31/2014 | 1 | schedule reflects monitoring reduction granted | |||