| 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 | Quarterly | 01/01/2026 - 03/31/2026 | 62 | 1 | incomplete | 09/02/2025 | |||
| CH-A COMMON HEADER FOR WTP-A | CYANOTOXINS | 2 Weeks | -- | -- | -- | -- | -- | 10/20/2025 | |||
| Seasonal sampling period: 05/01 thru 10/31 | |||||||||||
| DIST-A DISTRIBUTION SYSTEM | ASBESTOS, DIST | notes | 9 Years | 01/01/2020 - 12/31/2028 | 1,068 | 1 | incomplete | 10/02/2019 | |||
| DIST-A DISTRIBUTION SYSTEM | LEAD & COPPER | notes | 3 Years | 01/01/2027 - 12/31/2027 | 30 | 07/08/2024 | |||||
| Seasonal sampling period: 06/01 thru 09/30 | |||||||||||
| DIST-A DISTRIBUTION SYSTEM | STAGE 2 DBP | notes | Quarterly | 01/01/2026 - 03/31/2026 | 62 | 2 | incomplete | 09/02/2025 | |||
| EP-A EP FOR MOLALLA RIVER | ARSENIC | notes | 9 Years | 01/01/2023 - 12/31/2031 | 2,163 | 1 | done | 01/16/2025 | |||
| EP-A EP FOR MOLALLA RIVER | IOC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 1,068 | 1 | done | 01/16/2025 | |||
| EP-A EP FOR MOLALLA RIVER | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 337 | 1 | incomplete | 01/16/2025 | ||||
| EP-A EP FOR MOLALLA RIVER | NITRITE | notes | 9 Years | 01/01/2020 - 12/31/2028 | 1,068 | 1 | done | 01/16/2025 | |||
| EP-A EP FOR MOLALLA RIVER | RAD - GROSS ALPHA | 9 Years | 01/01/2023 - 12/31/2031 | 2,163 | 1 | incomplete | 01/03/2022 | ||||
| EP-A EP FOR MOLALLA RIVER | RAD - RADIUM 226/228 | 9 Years | 01/01/2023 - 12/31/2031 | 2,163 | 1 | incomplete | 01/03/2022 | ||||
| EP-A EP FOR MOLALLA RIVER | RAD - URANIUM | 9 Years | 01/01/2023 - 12/31/2031 | 2,163 | 1 | incomplete | 01/03/2022 | ||||
| EP-A EP FOR MOLALLA RIVER | SOC | notes | 3 Years | 01/01/2026 - 12/31/2028 | 1,068 | 2 | incomplete | 01/16/2025 | |||
| EP-A EP FOR MOLALLA RIVER | VOLATILE ORGANICS | Yearly | 01/01/2026 - 12/31/2026 | 337 | 1 | incomplete | 01/16/2025 | ||||
7 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 | 01/01/2002 | 03/31/2006 | 1 | Raw and filtered TOC and alkalinity | |||
| DIST-A DISTRIBUTION SYSTEM | HAA5 & TTHM | Quarterly | 01/01/2002 | 09/30/2013 | 1 | Schedule Reflects Monitoring Reduction Granted | |||
| DIST-A DISTRIBUTION SYSTEM | STAGE 2 DBP | Quarterly | 10/01/2013 | 12/31/2015 | 4 | Sample in Dec, Mar, June, and Sept | |||
| EP-A EP FOR MOLALLA RIVER | ARSENIC | Yearly | 01/01/2002 | 12/31/2004 | 1 | ||||
| EP-A EP FOR MOLALLA RIVER | ATRAZINE | Quarterly | 07/01/2015 | 03/31/2016 | 1 | Evaluate 2015 data after 4th quarter sampling | |||
| EP-A EP FOR MOLALLA RIVER | ATRAZINE | Yearly | 01/01/2017 | 03/31/2019 | 1 | Sample in the first quarter. | |||
| EP-A EP FOR MOLALLA RIVER | RAD - GROSS ALPHA | 6 Years | 01/01/2017 | 12/31/2022 | 1 | ||||
| EP-A EP FOR MOLALLA RIVER | RAD - GROSS ALPHA | 9 Years | 01/01/2008 | 12/31/2016 | 1 | Schedule Reflects Monitoring Reduction Granted | |||
| EP-A EP FOR MOLALLA RIVER | RAD - RADIUM 226/228 | 6 Years | 01/01/2008 | 12/31/2013 | 1 | Schedule Reflects Monitoring Reduction Granted | |||
| EP-A EP FOR MOLALLA RIVER | RAD - URANIUM | 6 Years | 01/01/2008 | 12/31/2013 | 1 | Schedule Reflects Monitoring Reduction Granted | |||
| EP-A EP FOR MOLALLA RIVER | SIMAZINE | Quarterly | 07/01/2015 | 03/31/2016 | 1 | Evaluate 2015 data after 4th quarter sampling | |||
| EP-A EP FOR MOLALLA RIVER | SIMAZINE | Yearly | 01/01/2017 | 03/31/2019 | 1 | Sample in the first quarter. | |||
| EP-A EP FOR MOLALLA RIVER | SOC | 3 Years | 01/01/2002 | 12/31/2019 | 2 | 2 Consec. QT Samples | |||