Public water system record
O Fallon
Serves O'Fallon and Fairview Heights, St. Clair County, IL · 46,603 people served
Federal records show no health-based violations and no monitoring or reporting issues for O Fallon 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
- O Fallon buys its water from IL American-East St Louis.
- Record on file since 1991, with 17 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 457 unknown out of 18,810 service lines.
Check whether O Fallon 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 1991
EPA's records for O Fallon go back to 1991. Before October 19, 2016 they list 17 health-based violations (2 resolved, 15 archived by EPA without a recorded fix) and 9 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 17 | 8 |
| 2000s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 1999, Archived.
Show all 17 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1999 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 1998 | Archived |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Apr 1, 1998 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1996 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Mar 1, 1996 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1995 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1994 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1994 | Archived |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Jul 1, 1994 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 1994 | Archived |
|
Lead and Copper Rule
Treatment technique failure
|
Sep 1, 1993 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1993 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Mar 1, 1993 | Archived |
|
Lead and Copper Rule
Treatment technique failure
|
Feb 4, 1993 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1992 | Archived |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Sep 1, 1992 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1991 | Archived |
Where the water comes from
O Fallon buys its water from IL American-East St Louis. It lists no wells or intakes of its own. 3 smaller public systems such as schools, businesses or campgrounds buy water from O Fallon.
Buys water from
- IL American-East St Louis Godfrey, IL
Annual water quality report
O Fallon 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