C51/100
JEFFERSON, CITY OF — Water Quality Report 2026
Serving 3,348 people · Oregon
Water Source
Surface Water
County
—
System ID
OR4100408
Violations
45
Contaminant Test Results
EPA Violation History
4
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: March 1, 2025 – March 31, 2025Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: March 1, 2025 – March 31, 2025Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: March 1, 2025 – March 31, 2025Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: August 1, 2021 – August 31, 2021Rule: Total Coliform RuleEnforcement: 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 JEFFERSON, CITY OF
Is JEFFERSON, CITY OF water safe to drink?
JEFFERSON, CITY OF water receives a grade of C (51/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 45 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has JEFFERSON, CITY OF detected?
1 contaminants were tested in JEFFERSON, CITY OF's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does JEFFERSON, CITY OF have any EPA violations?
Yes, JEFFERSON, CITY OF has 45 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MON, TT. 1 are health-based violations.
How many people does JEFFERSON, CITY OF serve?
JEFFERSON, CITY OF serves approximately 3,348 people, Oregon.
What type of water does JEFFERSON, CITY OF provide?
JEFFERSON, CITY OF sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is OR4100408.
How does JEFFERSON, CITY OF compare to other utilities in Oregon?
JEFFERSON, CITY OF scores 51/100 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.