OHA Drinking Water Services
OR41
PWS ID: 01324 ---- WEST YAMHILL WATER COMPANY
Maximum Residual Disinfection Level (MRDL) Samples
MRDL Monitoring Requirements :: Excel Spreadsheet

Monitoring
Period		 Entry
Point		 Samples
Required		 Samples
Collected		 Period
Avg		 Annual
Avg		 Level
Compliance
Jun 01, 2025 DIST-A 1 1 0.04 0.2Y
May 01, 2025 DIST-A 1 1 0.24 0.2Y
Apr 01, 2025 DIST-A 1 1 0.37 0.2Y
Mar 01, 2025 DIST-A 1 1 0.05 0.2Y
Feb 01, 2025 DIST-A 1 1 0.21 0.2Y
Jan 01, 2025 DIST-A 1 1 0.61 0.2Y
Dec 01, 2024 DIST-A 1 1 0.17 0.1Y
Nov 01, 2024 DIST-A 1 1 0.09 0.1Y
Oct 01, 2024 DIST-A 1 1 0.11 0.1Y
 



More information for this water system: SDWIS ID 4711
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