TapSafetyReport
C56/100

South Jacksonville Tap Water Quality: Is It Safe to Drink? (2026 Report)

Serving 3,508 residents · Illinois

What's In South Jacksonville's Tap Water?

31
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
ContaminantDetectedLimit (MCL)Status
Lead (90th percentile)
0.017 mg/L0.015 mg/LOver Limit

EPA Violation History

10

Violations (last 5yr)

0

Unresolved

0

Health-Related

TIER 3Resolved

Surface water treatment technique failure

When: July 1, 2025 – September 29, 2025Enforcement: 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, 2024 – December 31, 2024Rule: 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: July 1, 2024 – September 30, 2024Rule: 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: April 1, 2024 – June 30, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed to issue ongoing public notification

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

When: August 1, 2023 – March 5, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed to issue ongoing public notification

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

When: May 1, 2023 – March 5, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Monitoring Violation

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

When: November 1, 2022 – November 30, 2022Rule: Total Coliform 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, 2022 – December 15, 2022Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Disinfection byproduct treatment technique failure

When: June 12, 2021 – May 1, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Disinfection byproduct treatment technique failure

When: June 12, 2021 – May 1, 2023Rule: Ground Water 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

Water Utility Details

SOUTH JACKSONVILLE
Population Served

3,508

Water Source

Groundwater

System ID

IL1370400

Frequently Asked Questions About South Jacksonville Water

Is South Jacksonville tap water safe to drink?

South Jacksonville, Illinois tap water receives a grade of C (56/100), which is considered fair. 1 contaminant(s) exceed EPA maximum contaminant levels and 28 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.

What contaminants are in South Jacksonville's water?

Of the 31 contaminants tested in South Jacksonville's water supply, the most notable include Lead (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.

Does South Jacksonville have any water quality violations?

Yes, South Jacksonville has 28 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MON. 2 of these are health-based violations, which are the most serious category.

Do I need a water filter in South Jacksonville?

Based on EPA data, using a water filter in South Jacksonville is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.

Where does South Jacksonville's tap water come from?

South Jacksonville's drinking water is sourced from groundwater and supplied by SOUTH JACKSONVILLE. The system serves approximately 3,508 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.

How often is South Jacksonville's water tested?

Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. South Jacksonville's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.

How does South Jacksonville's water compare to other cities in Illinois?

South Jacksonville's water quality score of 56/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Illinois state page to see how all cities in the state compare.

What should I do if I'm concerned about South Jacksonville's water quality?

If you have concerns about South Jacksonville's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (SOUTH JACKSONVILLE) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.

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