A86/100
COLUMBUS JUNCTION WATER SUPPLY — Water Quality Report 2026
Serving 1,830 people · Iowa
Water Source
Groundwater
County
—
System ID
IA5815064
Violations
6
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.40 mg/L | 1.30 mg/L | Over Limit |
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: October 1, 2021 – October 31, 2021Rule: 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: October 1, 2021 – October 31, 2021Rule: 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 COLUMBUS JUNCTION WATER SUPPLY
Is COLUMBUS JUNCTION WATER SUPPLY water safe to drink?
COLUMBUS JUNCTION WATER SUPPLY water receives a grade of A (86/100), which is considered excellent. Out of 2 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has COLUMBUS JUNCTION WATER SUPPLY detected?
2 contaminants were tested in COLUMBUS JUNCTION WATER SUPPLY's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does COLUMBUS JUNCTION WATER SUPPLY have any EPA violations?
Yes, COLUMBUS JUNCTION WATER SUPPLY has 6 EPA violation(s) on record, with the most recent in 2021. Violation types include MR.
How many people does COLUMBUS JUNCTION WATER SUPPLY serve?
COLUMBUS JUNCTION WATER SUPPLY serves approximately 1,830 people, Iowa. The system provides water to 1 community: Columbus Junction.
What type of water does COLUMBUS JUNCTION WATER SUPPLY provide?
COLUMBUS JUNCTION WATER SUPPLY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IA5815064.
How does COLUMBUS JUNCTION WATER SUPPLY compare to other utilities in Iowa?
COLUMBUS JUNCTION WATER SUPPLY scores 86/100 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.