OHA Drinking Water Services
OR41 00587 ONTARIO, CITY OF Classification: COMMUNITY
Contact: DUSTIN MOSHER Phone: 541-889-8011 View on Map
1900 SE 5TH AVENUE County: MALHEUR
ONTARIO, OR 97914 Activity Status: Active -- History
Population: 14,465 Number of Connections: 4,082
Operating Period: January 1 to December 31 Regulating Agency: REGION 1
Certified Operator(s) Owner Type: LOCAL GOVERNMENT
Required: Y Licensed By: N/A
Distribution class: 2 Last Survey Date:  Jun 16, 2022 - Outstanding Performer!
Treatment class: 3
Filtration Endorsement Required: No Source Water Protection Status

Sources
Facility ID Facility Name  -  Well Logs Activity Status Availability Source Type
EP-A EP FOR RIVER, WELLS A SW
SRC-AA SNAKE RIVER A Permanent SW
SRC-AB WELL 4 - MALH1649 A Permanent GU
SRC-AE WELL 6 - MALH1284 A Permanent GU
SRC-AF WELL 14 - MALH1629 A Permanent GU
SRC-AG WELL 15 - L88892 A Permanent GU
SRC-AH WELL 16 - L88891 A Permanent GU
SRC-AI WELL 17 - L106327 A Permanent GU
Show Disconnected and Abandoned Sources
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Treatment
Facility ID Facility Name Filter Type Giardia Removal
Credit		 Treatment Process Treatment Objective
WTP-A1 TP FOR OLD PLANT Conventional Filtration 2.5-logFILTRATION, RAPID SAND PARTICULATE REMOVAL
HYPOCHLORINATION, POST DISINFECTION
HYPOCHLORINATION, PRE DISINFECTION
PH ADJ-CAUSTIC SODA CORROSION CONTROL
PERMANGANATE IRON REMOVAL
COAGULATION PARTICULATE REMOVAL
FLOCCULATION PARTICULATE REMOVAL
RAPID MIX PARTICULATE REMOVAL
SEDIMENTATION PARTICULATE REMOVAL
WTP-A2 TP FOR WESTECH PLANT Conventional Filtration 2.5-logFILTRATION, RAPID SAND PARTICULATE REMOVAL
HYPOCHLORINATION, POST DISINFECTION
HYPOCHLORINATION, PRE DISINFECTION
PH ADJ-CAUSTIC SODA CORROSION CONTROL
PERMANGANATE IRON REMOVAL
COAGULATION PARTICULATE REMOVAL
FLOCCULATION PARTICULATE REMOVAL
RAPID MIX PARTICULATE REMOVAL
SEDIMENTATION PARTICULATE REMOVAL

Consumer Confidence Reports (Last 5 Years)
For Year Date Received Date Certified
2024 5/7/2025 5/7/2025
2023 3/5/2024 3/5/2024
2022 5/1/2023 5/1/2023
2021 4/1/2022 4/1/2022
2020 6/9/2021 6/9/2021

Cross Connection/Backflow Prevention Information (Last 3 Records)
Enabling Authority Received Annual Summary Report Cross Connection Fee Status
Yes (pdf) 2024 - Received (pdf)
2023 - Received (pdf)
2022 - Received (pdf)
2021 - Received (pdf)
2020 - Received (pdf)
 2025 - Paid
2024 - Paid
2023 - Paid
2022 - Paid
2021 - Paid

More information for this water system: SDWIS ID 3898
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