B62/100
ST JACOB — Water Quality Report 2026
Serving 1,835 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL1190950
Violations
22
Contaminant Test Results
EPA Violation History
6
Violations (last 5yr)
3
Unresolved
1
Health-Related
TIER 3Unresolved
Disinfection byproduct treatment technique failure
When: August 22, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2025 – August 12, 2025Enforcement: Resolving — corrective action underway
TIER 2Unresolved
Treatment technique violation
When: October 17, 2024Rule: 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: 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: October 1, 2023 – December 31, 2023Rule: 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 ST JACOB
Is ST JACOB water safe to drink?
ST JACOB water receives a grade of B (62/100), which is considered good. Out of 1 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has ST JACOB detected?
1 contaminants were tested in ST JACOB's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does ST JACOB have any EPA violations?
Yes, ST JACOB has 22 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, RPT, TT. 4 are health-based violations.
How many people does ST JACOB serve?
ST JACOB serves approximately 1,835 people, Illinois. The system provides water to 1 community: Saint Jacob.
What type of water does ST JACOB provide?
ST JACOB 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 IL1190950.
How does ST JACOB compare to other utilities in Illinois?
ST JACOB scores 62/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Illinois state page for a full comparison of water systems.