Public water system record
Huntley
Serves Huntley, McHenry County and Kane County, IL · 28,495 people served
Federal records show 1 health-based violation and no monitoring/reporting issues for Huntley in the last ten years. The most serious issue in this window was a Revised Total Coliform Rule violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 0
- Unresolved
- 0
- Archived by EPA
- 1
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 0
Key facts
- Huntley draws water from 5 wells.
- Most recent enforcement action: boil water order by Illinois, October 2025.
- Record on file since 1977, with 14 health-based violations before October 19, 2016.
- Lead pipe inventory: 9 lead and 42 unknown out of 11,100 service lines.
Check whether Huntley 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 |
|---|---|---|---|---|
|
Revised Total Coliform Rule
Contaminant limit exceeded
|
110 | Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
Full record since 1977
EPA's records for Huntley go back to 1977. Before October 19, 2016 they list 14 health-based violations (13 resolved, 1 archived by EPA without a recorded fix) and 8 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1990s | 10 | 6 |
| 2000s | 4 | 1 |
| 2020s | 1 | 0 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began January 2008, Resolved.
Show all 14 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 7 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
|
Jan 1, 2008 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
Oct 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
Jul 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Apr 1, 2000 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Sep 23, 1997 | Resolved |
|
Barium
Contaminant limit exceeded
|
Jul 1, 1997 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1997 | Archived |
|
Barium
Contaminant limit exceeded
|
Apr 1, 1997 | Resolved |
|
Barium
Contaminant limit exceeded
|
Jan 1, 1997 | Resolved |
|
Barium
Contaminant limit exceeded
|
Oct 1, 1996 | Resolved |
|
Barium
Contaminant limit exceeded
|
Jul 1, 1996 | Resolved |
|
Barium
Contaminant limit exceeded
|
Apr 1, 1996 | Resolved |
|
Barium
Contaminant limit exceeded
|
Jan 1, 1996 | Resolved |
|
Barium
Contaminant limit exceeded
|
Oct 1, 1995 | Resolved |
Enforcement actions
Illinois regulators took 1 formal enforcement action against Huntley and issued 1 boil water order between 2008 and 2025. The most recent was a boil water order in October 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 16, 2025 | Illinois | Boil water order | 1 violation (1 health-based): Revised Total Coliform Rule |
| Jan 3, 2008 | Illinois | Signed compliance agreement | 2 violations (2 health-based): Combined Radium (-226 and -228) |
What the violations mean
Revised Total Coliform Rule
1 incidentThe system did not meet a requirement of the Revised Total Coliform Rule
Coliform and E. coli rules protect against bacteria in the distribution system
Where the water comes from
Huntley draws water from 5 wells. It also has an emergency connection to Lake in the Hills. 3 smaller public systems such as schools, businesses or campgrounds buy water from Huntley. 1 other public water system has an emergency connection to Huntley.
Emergency or part-time connections to
- Lake in the Hills Lake in the Hills, IL
Annual water quality report
Huntley 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