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C55/100

CARTER LAKE WATER DISTRICT — Water Quality Report 2026

Serving 3,791 people · Iowa

Water Source
Purchased Surface Water
County
—
System ID
IA7812079
Violations
18

Contaminant Test Results

1 contaminant above EPA health goals
ContaminantDetectedLimit (MCL)Status
Lead (90th percentile)
0.003 mg/L0.015 mg/LAbove Goal

EPA Violation History

7

Violations (last 5yr)

2

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: October 1, 2022 – September 30, 2023Enforcement: 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: June 1, 2022 – June 30, 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: June 1, 2022 – June 30, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Unresolved

Disinfection byproduct treatment technique failure

When: May 22, 2022Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved

Disinfection byproduct treatment technique failure

When: May 22, 2022Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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: December 1, 2021 – December 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: December 1, 2021 – December 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 CARTER LAKE WATER DISTRICT

Is CARTER LAKE WATER DISTRICT water safe to drink?

CARTER LAKE WATER DISTRICT water receives a grade of C (55/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 18 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has CARTER LAKE WATER DISTRICT detected?

31 contaminants were tested in CARTER LAKE WATER DISTRICT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).

Does CARTER LAKE WATER DISTRICT have any EPA violations?

Yes, CARTER LAKE WATER DISTRICT has 18 EPA violation(s) on record, with the most recent in 2022. Violation types include MR, Other, MCL. 6 are health-based violations.

How many people does CARTER LAKE WATER DISTRICT serve?

CARTER LAKE WATER DISTRICT serves approximately 3,791 people, Iowa. The system provides water to 1 community: Carter Lake.

What type of water does CARTER LAKE WATER DISTRICT provide?

CARTER LAKE WATER DISTRICT 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 IA7812079.

How does CARTER LAKE WATER DISTRICT compare to other utilities in Iowa?

CARTER LAKE WATER DISTRICT scores 55/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Iowa state page for a full comparison of water systems.

Cities Served

Carter Lake