OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details
PWS ID: OR41 00057
PWS Name: OLNEY-WALLUSKI WATER ASSN
 
Who Was Contacted: Bill Young
Contact Phone: 503-791-2029 (Email address hidden)
Contact Date: 11/12/2025
Contacted By: FARRELLY, PETER (DWP)
Contact Method/Location: Email
 
Assistance Type: WATER QUALITY ALERT RESPONSE
Reasons: Disinfection Byproducts
 
Details: No Action Required.


The highest three HAA5 results of the last 5 quarters slightly exceed the MCL.
The highest recent samples ranged from 62-65 ppb, while the MCL is 60 ppb:

  • 65 ppb - Oct. 2025
  • 62 ppb - Apr 2025
  • 62 ppb - Dec. 2024*

    • * incorrect sample site


    Compliance, however, is assessed using the running annual average, which is reasonably low (16 ppb - 26 ppb):
    See the LRAA Results

    (See Dec 2024 Contact Report for details.)
     
    Associated Alerts: DBP-178 - 11/12/2025 - TOTAL HALOACETIC ACIDS (HAA5)


    More information for this water system: SDWIS ID 4380
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