A88/100
NORWALK WATER SUPPLY — Water Quality Report 2026
Serving 14,334 people · Iowa
Water Source
Purchased Surface Water
County
—
System ID
IA9164078
Violations
8
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2011.
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 NORWALK WATER SUPPLY
Is NORWALK WATER SUPPLY water safe to drink?
NORWALK WATER SUPPLY water receives a grade of A (88/100), which is considered excellent. Out of 34 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has NORWALK WATER SUPPLY detected?
34 contaminants were tested in NORWALK WATER SUPPLY's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does NORWALK WATER SUPPLY have any EPA violations?
Yes, NORWALK WATER SUPPLY has 8 EPA violation(s) on record, with the most recent in 2011. Violation types include MR, MCL. 1 are health-based violations.
How many people does NORWALK WATER SUPPLY serve?
NORWALK WATER SUPPLY serves approximately 14,334 people, Iowa. The system provides water to 1 community: Norwalk.
What type of water does NORWALK WATER SUPPLY provide?
NORWALK WATER SUPPLY sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IA9164078.
How does NORWALK WATER SUPPLY compare to other utilities in Iowa?
NORWALK WATER SUPPLY scores 88/100 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.