OHA Drinking Water Services
OR41
PWS ID: 00665 ---- TUALATIN VALLEY WATER DISTRICT

See also: Coliform Schedules

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 notesYearly01/01/2025 - 12/31/2025 173 50 done 06/23/2024
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 07/01/2025 - 09/30/2025 81 8 incomplete03/04/2025
EP-C  EP FOR WELL 1 - GRABHORN ASR ARSENIC notes9 Years01/01/2017 - 12/31/2025 173 1 done 09/26/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR IOC notes9 Years01/01/2017 - 12/31/2025 173 1 done 11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR NITRATE  Yearly 01/01/2025 - 12/31/2025 173 1 incomplete09/26/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR NITRITE notes9 Years01/01/2017 - 12/31/2025 173 1 done 09/26/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR RAD - GROSS ALPHA notes9 Years01/01/2020 - 12/31/2028 1,269 1 done 11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR RAD - RADIUM 226/228notes9 Years 01/01/2023 - 12/31/2031 2,364 1 incomplete11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR RAD - URANIUM notes9 Years 01/01/2023 - 12/31/2031 2,364 1 incomplete11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR SOC notes3 Years01/01/2023 - 12/31/2025 173 2 done 10/16/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR VOLATILE ORGANICS  3 Years 01/01/2023 - 12/31/2025 173 1 incomplete11/04/2020

17  secs
Show Expired


More information for this water system: SDWIS ID 4065
System Info  ::  Report for Lenders  ::  Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Contacts & Advisories  ::  Site Visits  ::  Public Notice
Coliform Summary  ::  Coliform Results  ::  Coliform Schedules  ::  LT2  ::  GW/GWUDI Source Details  ::  Plan Review  ::  Annual Fee
Chemical Summary  ::  Chemical Results  ::  Chemical Schedules  ::  Chemical Schedule Summary  ::  Arsenic RAA  ::  Cyanotoxins  ::  PFAS
Lead & Copper  ::  DBP Sample Sites  ::  FANLs  ::  MRDL  ::  GWR 4-Log  ::  Turbidity  ::  SWTR  ::  LRAA  ::  DW Source Protection
Information for all water systems:
Water System Inventory  ::  Water System Surveys  ::  Outstanding Performers  ::  Treatment Plant Inspections  ::  Treatment  ::  Plan Reviews
Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Deficiencies  ::  System Scores  ::  Exceedances  ::  Public Notices  ::  Service Lines
Water Advisories  ::  Contact Reports  ::  Cyanotoxins  ::  PFAS  ::  Post-wildfire VOCs  ::  Fluoride  ::  Certification List  ::  DW Source Protection
Main menu:
Introduction  ::  Data Search Options  ::  Water System Search  ::  DWS Home  ::  DWS Rules
Need help? Email Drinking Water Services for assistance.Staff/Partner Login