Public water system record
West Chicago
Serves West Chicago, DuPage County, IL · 25,166 people served
Federal records show no health-based violations and no monitoring or reporting issues for West Chicago 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
- West Chicago draws water from 9 wells.
- Most recent formal enforcement: signed compliance agreement by Illinois, February 2004.
- Record on file since 1977, with 22 health-based violations before October 19, 2016.
- Lead pipe inventory: 448 lead and 0 unknown out of 6,583 service lines.
Check whether West Chicago 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 West Chicago go back to 1977. Before October 19, 2016 they list 22 health-based violations (22 resolved) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1990s | 5 | 1 |
| 2000s | 17 | 2 |
Most recent health-based violation before October 19, 2016: Gross Alpha, Excl. Radon and U, began October 2005, Resolved.
Show all 22 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 33 pCi/L, federal limit 15 pCi/L (2.2 times the limit)
|
Oct 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 14 pCi/L, federal limit 5 pCi/L (2.8 times the limit)
|
Oct 1, 2005 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 33 pCi/L, federal limit 15 pCi/L (2.2 times the limit)
|
Jul 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 14 pCi/L, federal limit 5 pCi/L (2.8 times the limit)
|
Jul 1, 2005 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 33 pCi/L, federal limit 15 pCi/L (2.2 times the limit)
|
Apr 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 14 pCi/L, federal limit 5 pCi/L (2.8 times the limit)
|
Apr 1, 2005 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 32.775 pCi/L, federal limit 15 pCi/L (2.2 times the limit)
|
Jan 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 14.475 pCi/L, federal limit 5 pCi/L (2.9 times the limit)
|
Jan 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 14.475 pCi/L, federal limit 5 pCi/L (2.9 times the limit)
|
Oct 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 17 pCi/L, federal limit 5 pCi/L (3.4 times the limit)
|
Jul 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21.5 pCi/L, federal limit 5 pCi/L (4.3 times the limit)
|
Apr 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21.5 pCi/L, federal limit 5 pCi/L (4.3 times the limit)
|
Jan 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21.5 pCi/L, federal limit 5 pCi/L (4.3 times the limit)
|
Oct 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21.5 pCi/L, federal limit 5 pCi/L (4.3 times the limit)
|
Jul 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 15.6 pCi/L, federal limit 5 pCi/L (3.1 times the limit)
|
Apr 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 15.6 pCi/L, federal limit 5 pCi/L (3.1 times the limit)
|
Jan 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 15.6 pCi/L, federal limit 5 pCi/L (3.1 times the limit)
|
Oct 1, 2002 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 1999 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Oct 1, 1998 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Feb 1, 1995 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 1995 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 18, 1991 | Resolved |
Enforcement actions
Illinois regulators took 3 formal enforcement actions against West Chicago between 1991 and 2004. The most recent was a signed compliance agreement in February 2004.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Feb 13, 2004 | Illinois | Signed compliance agreement | 22 violations (22 health-based): Combined Radium (-226 and -228), Gross Alpha, Excl. Radon and U |
| Oct 12, 2001 | Illinois | Signed compliance agreement | 6 violations (6 health-based): Combined Radium (-226 and -228), Gross Alpha, Excl. Radon and U |
| Jun 20, 1991 | Illinois | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
Where the water comes from
West Chicago draws water from 9 wells. 5 smaller public systems such as schools, businesses or campgrounds buy water from West Chicago.
Annual water quality report
West Chicago 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