Public water system record
Algonquin
Serves Algonquin, McHenry County and Kane County, IL · 30,700 people served
Federal records show no health-based violations and no monitoring or reporting issues for Algonquin 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
- Algonquin draws water from 9 wells.
- Record on file since 1977, with 6 health-based violations before October 19, 2016.
- Lead pipe inventory: 11,809 lead and 6 unknown out of 11,858 service lines.
Check whether Algonquin 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 Algonquin go back to 1977. Before October 19, 2016 they list 6 health-based violations (4 resolved, 2 archived by EPA without a recorded fix) and 16 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1980s | 3 | 0 |
| 1990s | 2 | 12 |
| 2000s | 1 | 3 |
Most recent health-based violation before October 19, 2016: Total Coliform, began August 2006, Resolved.
Show all 6 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2006 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Sep 2, 1993 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jul 1, 1993 | Resolved |
|
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
Algonquin draws water from 9 wells. 5 smaller public systems such as schools, businesses or campgrounds buy water from Algonquin.
Annual water quality report
Algonquin 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