C44/100
KEIZER, CITY OF — Water Quality Report 2026
Serving 38,585 people · Oregon
Water Source
Groundwater
County
—
System ID
OR4100744
Violations
48
Contaminant Test Results
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2024 – December 31, 2024Enforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About KEIZER, CITY OF
Is KEIZER, CITY OF water safe to drink?
KEIZER, CITY OF water receives a grade of C (44/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 48 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has KEIZER, CITY OF detected?
63 contaminants were tested in KEIZER, CITY OF's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does KEIZER, CITY OF have any EPA violations?
Yes, KEIZER, CITY OF has 48 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MON, MCL. 2 are health-based violations.
How many people does KEIZER, CITY OF serve?
KEIZER, CITY OF serves approximately 38,585 people, Oregon.
What type of water does KEIZER, CITY OF provide?
KEIZER, CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is OR4100744.
How does KEIZER, CITY OF compare to other utilities in Oregon?
KEIZER, CITY OF scores 44/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Oregon state page for a full comparison of water systems.