Public water system record
Aqua Illinois-Hawthorn Woods
Serves Hawthorn Woods, Lake County, IL · 3,065 people served
Federal records show 1 health-based violation and 4 monitoring/reporting issues for Aqua Illinois-Hawthorn Woods in the last ten years. The most serious issue in this window was a resolved Combined Radium (-226 and -228) violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 4
Key facts
- Aqua Illinois-Hawthorn Woods draws water from 3 wells.
- Highest measured level in the last 10 years: Combined Radium (-226 and -228), 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit), 2025.
- Record on file since 2009, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 69 unknown out of 1,298 service lines.
Check whether Aqua Illinois-Hawthorn Woods serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Apr 1, 2025 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Jun 14, 2025 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Oct 1, 2024 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Apr 1, 2023 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
Full record since 2009
EPA's records for Aqua Illinois-Hawthorn Woods go back to 2009. Before October 19, 2016 they list no health-based violations and 2 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 1 |
| 2010 to October 18, 2016 | 0 | 1 |
| 2020s | 1 | 4 |
What the violations mean
Combined Radium (-226 and -228)
1 incidentTest results for Combined Radium (-226 and -228) were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about this violation.
Where the water comes from
Aqua Illinois-Hawthorn Woods draws water from 3 wells. 2 other community water systems buy water from Aqua Illinois-Hawthorn Woods.
Community systems that buy water from it
- Forest Lake Addition - Lake Co PW Libertyville, IL
- Lake County PW- Hawthorn Woods Libertyville, IL
Annual water quality report
Aqua Illinois-Hawthorn Woods must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Illinois.
Certified drinking water labs by state EPA guidance for private wells