B79/100
CARLISLE WATER SUPPLY — Water Quality Report 2026
Serving 4,170 people · Iowa
Water Source
Groundwater
County
—
System ID
IA9113071
Violations
10
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.57 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2023 – June 30, 2024Enforcement: Resolving — corrective action underway
TIER 3Unresolved
Disinfection byproduct treatment technique failure
When: July 24, 2022Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: March 1, 2022 – March 31, 2022Rule: Total Coliform RuleEnforcement: 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 CARLISLE WATER SUPPLY
Is CARLISLE WATER SUPPLY water safe to drink?
CARLISLE WATER SUPPLY water receives a grade of B (79/100), which is considered good. Out of 32 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CARLISLE WATER SUPPLY detected?
32 contaminants were tested in CARLISLE WATER SUPPLY's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does CARLISLE WATER SUPPLY have any EPA violations?
Yes, CARLISLE WATER SUPPLY has 10 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, Other, MON.
How many people does CARLISLE WATER SUPPLY serve?
CARLISLE WATER SUPPLY serves approximately 4,170 people, Iowa. The system provides water to 1 community: Carlisle.
What type of water does CARLISLE WATER SUPPLY provide?
CARLISLE WATER SUPPLY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IA9113071.
How does CARLISLE WATER SUPPLY compare to other utilities in Iowa?
CARLISLE WATER SUPPLY scores 79/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Iowa state page for a full comparison of water systems.