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Ullin, IL Tap Water Quality 2026

Water quality report for Ullin, IL — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Ullin's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Ullin PWSID: IL1530350 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 12.40 ppb, 83% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Ullin earns a B for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 12.40 ppb — 83% of the federal action level
PFAS never sampled at this system
3 violations since 2015, 0 health-based
No violations currently open
Ullin's lead level vs. all Illinois community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 12.40 ppb — 83% of the federal action level
✓ Lower lead than 4% of Illinois utilities
Population Served
287
~230 connections
Water Source
Groundwater
Purchased groundwater from another system — SDWIS source code GWP
Active Violations
0
3 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
83% of EPA action level
12.40 ppb
Action level: 15 ppb
The 90th-percentile lead result is 12.40 ppb, 83% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2025 Unaddressed
Consumer Confidence Rule OTHER — — 2024 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2020 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

3 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Ullin
PWSID IL1530350
Water source Groundwater — Purchased groundwater from another system — SDWIS source code GWP
Population served 287
Service connections 230
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Ullin tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 12.40 ppb, 83% of the action level.
Does Ullin water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to Ullin? ▼
Ullin (PWSID IL1530350). Groundwater. Purchased groundwater from another system — SDWIS source code GWP
When was this system last inspected? ▼
It was last inspected on 2024-08-14. Inspectors recorded 2 significant deficiencies.

What Should Ullin Residents Do?

1
Consider a filter certified for lead
Look for NSF/ANSI 53 certification for lead reduction.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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