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F0/100

NAUVOO — Water Quality Report 2026

Serving 1,200 people · Illinois

Water Source
Surface Water
County
—
System ID
IL0670500
Violations
95

Contaminant Test Results

EPA Violation History

6

Violations (last 5yr)

1

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: May 1, 2025 – May 31, 2025Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Unresolved

Monitoring Violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: May 1, 2025 – May 31, 2025Rule: Total Coliform RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved

Disinfection byproduct treatment technique failure

When: July 11, 2024 – September 25, 2024Rule: Ground Water RuleEnforcement: 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, 2023 – December 31, 2023Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
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: April 1, 2023 – June 30, 2023Enforcement: Resolving — corrective action underway
TIER 3Resolved

Surface water treatment technique failure

When: July 1, 2021 – July 21, 2021Enforcement: 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 NAUVOO

Is NAUVOO water safe to drink?

NAUVOO water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 95 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has NAUVOO detected?

1 contaminants were tested in NAUVOO's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.

Does NAUVOO have any EPA violations?

Yes, NAUVOO has 95 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MON, Other. 20 are health-based violations.

How many people does NAUVOO serve?

NAUVOO serves approximately 1,200 people, Illinois. The system provides water to 1 community: Nauvoo.

What type of water does NAUVOO provide?

NAUVOO sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL0670500.

How does NAUVOO compare to other utilities in Illinois?

NAUVOO scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Illinois state page for a full comparison of water systems.

Cities Served

Nauvoo