| 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 | ||||||||||
| DIST-A DISTRIBUTION SYSTEM | LEAD & COPPER | notes | 3 Years | 01/01/2026 - 12/31/2026 | 30 | incomplete | 07/18/2023 | ||||
| Seasonal sampling period: 06/01 thru 09/30 | |||||||||||
| DIST-A DISTRIBUTION SYSTEM | STAGE 2 DBP | notes | Quarterly | 04/01/2026 - 06/30/2026 | 78 | 2 | incomplete | 01/12/2026 | |||
| EP-B EP FOR WELL #1 (BYERS) | NITRATE | notes | Yearly | 01/01/2026 - 12/31/2026 | 262 | 1 | incomplete | 06/05/2025 | |||
| EP-B EP FOR WELL #1 (BYERS) | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 78 | 1 | incomplete | ||||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-C EP FOR WELL #2 (ROUNDUP) | ARSENIC | notes | 9 Years | 01/01/2023 - 12/31/2031 | 2,088 | 1 | incomplete | 07/08/2020 | |||
| EP-C EP FOR WELL #2 (ROUNDUP) | IOC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 993 | 1 | done | 07/08/2020 | |||
| EP-C EP FOR WELL #2 (ROUNDUP) | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 262 | 1 | incomplete | 06/05/2025 | ||||
| EP-C EP FOR WELL #2 (ROUNDUP) | NITRITE | notes | 9 Years | 01/01/2020 - 12/31/2028 | 993 | 1 | done | 07/08/2020 | |||
| EP-C EP FOR WELL #2 (ROUNDUP) | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 78 | 1 | incomplete | ||||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-C EP FOR WELL #2 (ROUNDUP) | RAD - GROSS ALPHA | notes | 9 Years | 01/01/2023 - 12/31/2031 | 2,088 | 1 | incomplete | 10/26/2020 | |||
| EP-C EP FOR WELL #2 (ROUNDUP) | RAD - RADIUM 226/228 | 9 Years | 01/01/2026 - 12/31/2034 | 3,184 | 1 | incomplete | 10/26/2020 | ||||
| EP-C EP FOR WELL #2 (ROUNDUP) | RAD - URANIUM | 6 Years | 01/01/2026 - 12/31/2031 | 2,088 | 1 | incomplete | 08/31/2020 | ||||
| EP-C EP FOR WELL #2 (ROUNDUP) | SOC | notes | 3 Years | 01/01/2026 - 12/31/2028 | 993 | 2 | incomplete | 10/21/2025 | |||
| EP-C EP FOR WELL #2 (ROUNDUP) | VOLATILE ORGANICS | notes | 3 Years | 01/01/2026 - 12/31/2028 | 993 | 1 | incomplete | 08/29/2023 | |||
| EP-D EP FOR WELL #3 (SW 21 ST) | ARSENIC | 9 Years | 01/01/2026 - 12/31/2034 | 3,184 | 1 | incomplete | 07/08/2020 | ||||
| EP-D EP FOR WELL #3 (SW 21 ST) | IOC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 993 | 1 | done | 07/08/2020 | |||
| EP-D EP FOR WELL #3 (SW 21 ST) | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 262 | 1 | incomplete | 11/12/2025 | ||||
| EP-D EP FOR WELL #3 (SW 21 ST) | NITRITE | notes | 9 Years | 01/01/2020 - 12/31/2028 | 993 | 1 | done | 07/08/2020 | |||
| EP-D EP FOR WELL #3 (SW 21 ST) | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 78 | 1 | incomplete | ||||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-D EP FOR WELL #3 (SW 21 ST) | RAD - GROSS ALPHA | notes | 9 Years | 01/01/2026 - 12/31/2034 | 3,184 | 1 | incomplete | 10/26/2020 | |||
| EP-D EP FOR WELL #3 (SW 21 ST) | RAD - RADIUM 226/228 | 9 Years | 01/01/2026 - 12/31/2034 | 3,184 | 1 | incomplete | 10/26/2020 | ||||
| EP-D EP FOR WELL #3 (SW 21 ST) | RAD - URANIUM | 6 Years | 01/01/2026 - 12/31/2031 | 2,088 | 1 | incomplete | 08/31/2020 | ||||
| EP-D EP FOR WELL #3 (SW 21 ST) | SOC | notes | 3 Years | 01/01/2026 - 12/31/2028 | 993 | 2 | incomplete | 11/12/2025 | |||
| EP-D EP FOR WELL #3 (SW 21 ST) | VOLATILE ORGANICS | notes | 3 Years | 01/01/2026 - 12/31/2028 | 993 | 1 | incomplete | 08/29/2023 | |||
| EP-E EP FOR WELL #4 (HOSPITAL) | NITRATE | notes | Yearly | 01/01/2026 - 12/31/2026 | 262 | 1 | incomplete | 06/05/2025 | |||
| EP-E EP FOR WELL #4 (HOSPITAL) | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 78 | 1 | incomplete | 04/24/2023 | |||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-F EP FOR WELL #5 (STILLMAN) | NITRATE | notes | Yearly | 01/01/2026 - 12/31/2026 | 262 | 1 | incomplete | 07/28/2025 | |||
| EP-F EP FOR WELL #5 (STILLMAN) | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 78 | 1 | incomplete | ||||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-G EP FOR WELL #8 (PRISON) | NITRATE | notes | Yearly | 01/01/2026 - 12/31/2026 | 262 | 1 | incomplete | 06/05/2025 | |||
| EP-G EP FOR WELL #8 (PRISON) | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 78 | 1 | incomplete | ||||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-H EP FOR WELL #14 | NITRATE | notes | Yearly | 01/01/2026 - 12/31/2026 | 262 | 1 | incomplete | 06/05/2025 | |||
| EP-H EP FOR WELL #14 | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 78 | 1 | incomplete | ||||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-I EP FOR WELL 11B | ARSENIC | 3 Years | 01/01/2026 - 12/31/2028 | 993 | 1 | incomplete | |||||
| EP-I EP FOR WELL 11B | IOC | 3 Years | 01/01/2026 - 12/31/2028 | 993 | 1 | incomplete | |||||
| EP-I EP FOR WELL 11B | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 262 | 1 | incomplete | |||||
| EP-I EP FOR WELL 11B | NITRITE | 3 Years | 01/01/2026 - 12/31/2028 | 993 | 1 | incomplete | |||||
| EP-I EP FOR WELL 11B | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 78 | 1 | incomplete | ||||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-I EP FOR WELL 11B | RAD - GROSS ALPHA | 9 Years | 01/01/2026 - 12/31/2034 | 3,184 | 1 | incomplete | |||||
| EP-I EP FOR WELL 11B | RAD - RADIUM 226/228 | 6 Years | 01/01/2026 - 12/31/2031 | 2,088 | 1 | incomplete | |||||
| EP-I EP FOR WELL 11B | RAD - URANIUM | 9 Years | 01/01/2026 - 12/31/2034 | 3,184 | 1 | incomplete | |||||
| EP-I EP FOR WELL 11B | SOC | notes | 3 Years | 01/01/2026 - 12/31/2028 | 993 | 2 | incomplete | ||||
| EP-I EP FOR WELL 11B | VOLATILE ORGANICS | 3 Years | 01/01/2026 - 12/31/2028 | 993 | 1 | incomplete | |||||
6 secs | |||||||||||
| Expired Schedules | |||||||||
| Facility ID |
Analyte or Group | Sampling Interval |
Start | End | Samples Required |
Notes | |||
| CH-A COMMON HEADER FOR WTP-A | TOTAL ORGANIC CARBON | Monthly | 01/01/2002 | 12/31/2008 | 1 | Raw Water TOC Only Required for Reduction in DBP Monitoring | |||
| CH-A COMMON HEADER FOR WTP-A | TOTAL ORGANIC CARBON | Quarterly | 01/01/2009 | 03/12/2026 | 1 | Raw Water TOC Only Required for Reduction in DBP Monitoring | |||
| DIST-A DISTRIBUTION SYSTEM | HAA5 & TTHM | Quarterly | 01/01/2002 | 09/30/2013 | 2 | Schedule Reflects Monitoring Reduction Granted | |||
| DIST-A DISTRIBUTION SYSTEM | STAGE 2 DBP | Quarterly | 10/01/2013 | 03/31/2022 | 4 | Sample in Oct, Jan, Apr, and July | |||
| EP-A EP FOR WELL #7 AND WTP | ARSENIC | 9 Years | 01/01/2008 | 03/12/2026 | 1 | schedule reflects monitoring reduction granted - BG | |||
| EP-A EP FOR WELL #7 AND WTP | ARSENIC | Yearly | 01/01/2002 | 12/31/2007 | 1 | Arsenic monitoring reduced to once every nine years for EP-A effective 01/01/08 - BG | |||
| EP-A EP FOR WELL #7 AND WTP | IOC | 9 Years | 01/01/2002 | 03/12/2026 | 1 | Schedule Reflects Monitoring Reduction Granted | |||
| EP-A EP FOR WELL #7 AND WTP | NITRATE | Yearly | 01/01/2002 | 03/12/2026 | 1 | ||||
| EP-A EP FOR WELL #7 AND WTP | NITRITE | 9 Years | 01/01/2002 | 03/12/2026 | 1 | Schedule Reflects Monitoring Reduction Granted | |||
| EP-A EP FOR WELL #7 AND WTP | PFAS | Quarterly | 01/01/2023 | 03/12/2026 | 1 | Initial monitoring - 4 quarters only | |||
| EP-A EP FOR WELL #7 AND WTP | RAD - GROSS ALPHA | 9 Years | 01/01/2008 | 03/12/2026 | 1 | ||||
| EP-A EP FOR WELL #7 AND WTP | RAD - RADIUM 226/228 | 6 Years | 01/01/2008 | 12/31/2013 | 1 | ||||
| EP-A EP FOR WELL #7 AND WTP | RAD - RADIUM 226/228 | 9 Years | 01/01/2014 | 03/12/2026 | 1 | schedule based on 7/15/09 results | |||
| EP-A EP FOR WELL #7 AND WTP | RAD - URANIUM | 9 Years | 01/01/2008 | 03/12/2026 | 1 | ||||
| EP-A EP FOR WELL #7 AND WTP | SOC | 3 Years | 01/01/2002 | 03/12/2026 | 2 | 2 Consec. QT Samples | |||
| EP-A EP FOR WELL #7 AND WTP | VOLATILE ORGANICS | Yearly | 01/01/2002 | 03/12/2026 | 1 | ||||
| EP-C EP FOR WELL #2 (ROUNDUP) | ARSENIC | 3 Years | 01/01/2002 | 12/31/2013 | 1 | ||||
| EP-C EP FOR WELL #2 (ROUNDUP) | RAD - GROSS ALPHA | 6 Years | 01/01/2008 | 12/31/2013 | 1 | ||||
| EP-D EP FOR WELL #3 (SW 21 ST) | ARSENIC | 3 Years | 01/01/2002 | 12/31/2014 | 1 | ||||
| EP-D EP FOR WELL #3 (SW 21 ST) | NITRATE | Quarterly | 10/01/2020 | 09/30/2021 | 1 | ||||
| EP-D EP FOR WELL #3 (SW 21 ST) | NITRATE | Yearly | 01/01/2002 | 07/31/2020 | 1 | ||||
| EP-D EP FOR WELL #3 (SW 21 ST) | RAD - GROSS ALPHA | 6 Years | 01/01/2008 | 12/31/2016 | 1 | ||||
| EP-F EP FOR WELL #5 (STILLMAN) | NITRATE | Yearly | 01/01/2002 | 07/26/2011 | 1 | Wellfield designation, sample EP-C, D | |||
| SRC-AM UMATILLA RIVER | CYANOTOXINS | 2 Weeks | 07/15/2018 | 03/12/2026 | 1 | ||||