Public water system record
Crystal Lake
Serves Crystal Lake and Lakewood, McHenry County, IL · 40,661 people served
Federal records show no health-based violations and no monitoring or reporting issues for Crystal Lake in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- Crystal Lake draws water from 10 wells.
- Record on file since 1977, with 4 health-based violations before October 19, 2016.
- Lead pipe inventory: 531 lead and 1,117 unknown out of 13,746 service lines.
Check whether Crystal Lake 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.
None since October 2016, and no monitoring or reporting violations either.
Full record since 1977
EPA's records for Crystal Lake go back to 1977. Before October 19, 2016 they list 4 health-based violations (1 resolved, 3 archived by EPA without a recorded fix) and 10 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1980s | 3 | 8 |
| 1990s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 1996, Archived.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1996 | Archived |
|
Barium
Contaminant limit exceeded
|
Jun 1, 1986 | Resolved |
|
Barium
Contaminant limit exceeded
|
Jun 1, 1983 | Archived |
|
Barium
Contaminant limit exceeded
|
Jun 1, 1980 | Archived |
Where the water comes from
Crystal Lake draws water from 10 wells. 1 other community water system and 4 smaller public systems such as schools, businesses or campgrounds buy water from Crystal Lake.
Community systems that buy water from it
- Oakbrook Estates MHP Northbrook, IL
Annual water quality report
Crystal Lake 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.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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