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Hawthorn Woods, IL Tap Water Quality 2026

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

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

Main Utility: Aqua Illinois-Hawthorn Woods PWSID: IL0975040 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.70 ppb, 11% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Hawthorn Woods earns a B for water quality

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

Lead: 1.70 ppb — 11% of the federal action level
PFAS never sampled at this system
17 violations since 2015, 1 health-based
No violations currently open
Hawthorn Woods's lead level vs. all Illinois community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.70 ppb — 11% of the federal action level
✓ Lower lead than 70% of Illinois utilities
Population Served
3267
~1226 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
17 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
11% of EPA action level
1.70 ppb
Action level: 15 ppb
The 90th-percentile lead result is 1.70 ppb, 11% 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
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2026 Archived
Simazine MONITORING AND REPORTING — 0.004 mg/L 2026 Archived
LASSO MONITORING AND REPORTING — — 2026 Archived
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2026 Archived
Di(2-ethylhexyl) phthalate MONITORING AND REPORTING — 0.006 mg/L 2026 Archived
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2026 Archived
Di(2-ethylhexyl) adipate MONITORING AND REPORTING — 0.4 mg/L 2026 Archived
Endrin MONITORING AND REPORTING — 0.002 mg/L 2026 Archived
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2026 Archived
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2026 Archived
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2026 Archived
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2026 Archived
Public Notice OTHER — — 2025 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 6 PCI/L 5 pCi/L 2025 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2024 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2023 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2021 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

17 violations are on record since 2015, of which 1 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Aqua Illinois-Hawthorn Woods
PWSID IL0975040
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 3,267
Service connections 1,226
Systems serving this area 11
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Hawthorn Woods tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.70 ppb, 11% of the action level.
Does Hawthorn Woods 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 Hawthorn Woods? ▼
Aqua Illinois-Hawthorn Woods (PWSID IL0975040), one of 11 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2023-09-27. No significant deficiencies were recorded.

What Should Hawthorn Woods Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
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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