B79/100
BELOIT CITY OF — Water Quality Report 2026
Serving 36,677 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI1540112
Violations
10
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – August 6, 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 BELOIT CITY OF
Is BELOIT CITY OF water safe to drink?
BELOIT CITY OF water receives a grade of B (79/100), which is considered good. Out of 66 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has BELOIT CITY OF detected?
66 contaminants were tested in BELOIT CITY OF's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does BELOIT CITY OF have any EPA violations?
Yes, BELOIT CITY OF has 10 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MCL, MR. 2 are health-based violations.
How many people does BELOIT CITY OF serve?
BELOIT CITY OF serves approximately 36,677 people, Wisconsin. The system provides water to 1 community: Beloit.
What type of water does BELOIT CITY OF provide?
BELOIT CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI1540112.
How does BELOIT CITY OF compare to other utilities in Wisconsin?
BELOIT CITY OF scores 79/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Wisconsin state page for a full comparison of water systems.