A91/100
Northfield — Water Quality Report 2026
Serving 20,790 people · Minnesota
Water Source
Groundwater
County
—
System ID
MN1660010
Violations
3
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
manganese | 344.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
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 Northfield
Is Northfield water safe to drink?
Northfield water receives a grade of A (91/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has Northfield detected?
66 contaminants were tested in Northfield's water. Notable contaminants include Lead (90th percentile), manganese. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does Northfield have any EPA violations?
Yes, Northfield has 3 EPA violation(s) on record, with the most recent in 2014. Violation types include MR.
How many people does Northfield serve?
Northfield serves approximately 20,790 people, Minnesota.
What type of water does Northfield provide?
Northfield sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MN1660010.
How does Northfield compare to other utilities in Minnesota?
Northfield scores 91/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Minnesota state page for a full comparison of water systems.