A94/100
CHARLES CITY WATER SUPPLY — Water Quality Report 2026
Serving 7,446 people · Iowa
Water Source
Groundwater
County
—
System ID
IA3405012
Violations
3
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: August 1, 2022 – August 31, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: August 1, 2022 – August 31, 2022Rule: Stage 2 DBPREnforcement: 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 CHARLES CITY WATER SUPPLY
Is CHARLES CITY WATER SUPPLY water safe to drink?
CHARLES CITY WATER SUPPLY water receives a grade of A (94/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CHARLES CITY WATER SUPPLY detected?
31 contaminants were tested in CHARLES CITY WATER SUPPLY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CHARLES CITY WATER SUPPLY have any EPA violations?
Yes, CHARLES CITY WATER SUPPLY has 3 EPA violation(s) on record, with the most recent in 2022. Violation types include MR.
How many people does CHARLES CITY WATER SUPPLY serve?
CHARLES CITY WATER SUPPLY serves approximately 7,446 people, Iowa. The system provides water to 1 community: Charles City.
What type of water does CHARLES CITY WATER SUPPLY provide?
CHARLES CITY WATER SUPPLY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IA3405012.
How does CHARLES CITY WATER SUPPLY compare to other utilities in Iowa?
CHARLES CITY WATER SUPPLY scores 94/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Iowa state page for a full comparison of water systems.