| 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 | 04/01/2026 - 06/30/2026 | 54 | 1 | done | 04/01/2026 | |||
| DIST-A DISTRIBUTION SYSTEM | ASBESTOS, DIST | 9 Years | 01/01/2020 - 12/31/2028 | 969 | 1 | incomplete | 12/15/2008 | ||||
| DIST-A DISTRIBUTION SYSTEM | DBP2 HAA5 ONLY | notes | Yearly | 01/01/2026 - 12/31/2026 | 238 | 1 | done | 01/07/2026 | |||
| Seasonal sampling period: 01/01 thru 01/31 | |||||||||||
| DIST-A DISTRIBUTION SYSTEM | DBP2 TTHM ONLY | notes | Yearly | 01/01/2026 - 12/31/2026 | 238 | 1 | incomplete | 10/01/2025 | |||
| Seasonal sampling period: 10/01 thru 10/31 | |||||||||||
| DIST-A DISTRIBUTION SYSTEM | LEAD & COPPER | notes | 3 Years | 01/01/2027 - 12/31/2027 | 10 | 06/05/2024 | |||||
| Seasonal sampling period: 06/01 thru 09/30 | |||||||||||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | ARSENIC | notes | 9 Years | 01/01/2023 - 12/31/2031 | 2,064 | 1 | done | 11/05/2025 | |||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | IOC | notes | 9 Years | 01/01/2020 - 12/31/2028 | 969 | 1 | done | 11/05/2025 | |||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | NITRATE | Yearly | 01/01/2026 - 12/31/2026 | 238 | 1 | done | 04/01/2026 | ||||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | NITRITE | notes | 9 Years | 01/01/2020 - 12/31/2028 | 969 | 1 | done | 04/01/2026 | |||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | PFAS | notes | Quarterly | 04/01/2026 - 06/30/2026 | 54 | 1 | incomplete | ||||
| Initial monitoring - 4 quarters only | |||||||||||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | RAD - GROSS ALPHA | notes | 9 Years | 01/01/2026 - 12/31/2034 | 3,160 | 1 | incomplete | 04/07/2021 | |||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | RAD - RADIUM 226/228 | notes | 9 Years | 01/01/2023 - 12/31/2031 | 2,064 | 1 | incomplete | 04/07/2021 | |||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | RAD - URANIUM | notes | 9 Years | 01/01/2026 - 12/31/2034 | 3,160 | 1 | incomplete | 04/07/2021 | |||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | SOC | 3 Years | 01/01/2026 - 12/31/2028 | 969 | 1 | done | 04/01/2026 | ||||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | VOLATILE ORGANICS | Yearly | 01/01/2026 - 12/31/2026 | 238 | 1 | done | 04/01/2026 | ||||
7 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 | 01/01/2004 | 09/30/2008 | 1 | Raw Water TOC Only Required for Reduction in DBP Monitoring | |||
| CH-A COMMON HEADER FOR WTP-A | TOTAL ORGANIC CARBON | Monthly | 01/01/2009 | 06/30/2010 | 1 | Raw Water TOC Only Required to Maintain Reduction in DBP Monitoring | |||
| CH-A COMMON HEADER FOR WTP-A | TOTAL ORGANIC CARBON | Monthly | 10/01/2008 | 12/31/2008 | 1 | Raw Water TOC Only Required for Reduction in DBP Monitoring | |||
| DIST-A DISTRIBUTION SYSTEM | ASBESTOS, DIST | 9 Years | 01/01/2002 | 12/31/2010 | 1 | Schedule Reflects Monitoring Reduction Granted | |||
| DIST-A DISTRIBUTION SYSTEM | HAA5 & TTHM | Quarterly | 01/01/2005 | 12/31/2005 | 1 | Schedule Reflects 1 sample per WTP per QT | |||
| DIST-A DISTRIBUTION SYSTEM | HAA5 & TTHM | Yearly | 01/01/2006 | 09/30/2013 | 1 | Sample Between June 1st and Sept 30th | |||
| DIST-A DISTRIBUTION SYSTEM | STAGE 2 DBP | Quarterly | 10/01/2013 | 12/31/2014 | 1 | Sample in Oct, Jan, Apr, and July | |||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | ARSENIC | Yearly | 01/01/2002 | 01/01/2012 | 1 | ||||
| EP-A EP FOR UPPER TUALATIN R. - HAINES FALLS | RAD - RADIUM 226/228 | 6 Years | 01/01/2008 | 01/01/2013 | 1 | ||||