Public water system record
Duquoin
Serves Du Quoin and St. Johns, Perry County, IL · 7,169 people served
Federal records show 1 health-based violation and 7 monitoring/reporting issues for Duquoin in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 0
- Unresolved
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 7
Key facts
- Duquoin buys its water from Rend Lake Inter-City Water System.
- Record on file since 1992, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 1,336 lead and 1,769 unknown out of 3,664 service lines.
Check whether Duquoin 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 |
|---|---|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Active | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Aug 22, 2025 | Resolved |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Resolved |
|
Chloramine
Monitoring and reporting
|
Jul 1, 2025 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2025 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2020 | Resolved |
Full record since 1992
EPA's records for Duquoin go back to 1992. Before October 19, 2016 they list 5 health-based violations (5 archived by EPA without a recorded fix) and 3 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 5 | 2 |
| 2010 to October 18, 2016 | 0 | 1 |
| 2020s | 1 | 7 |
Most recent health-based violation before October 19, 2016: Total Coliform, began February 1998, Archived.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 1998 | Archived |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Feb 1, 1998 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1993 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1992 | Archived |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Sep 1, 1992 | Archived |
What the violations mean
LEAD AND COPPER RULE REVISIONS
1 incidentThe system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
Duquoin buys its water from Rend Lake Inter-City Water System. It lists no wells or intakes of its own. It also has an emergency connection to Elverado Water District. 1 other community water system and 2 smaller public systems such as schools, businesses or campgrounds buy water from Duquoin. 1 other public water system has an emergency connection to Duquoin.
Buys water from
- Rend Lake Inter-City Water System Benton, IL
Emergency or part-time connections to
- Elverado Water District Vergennes, IL
Community systems that buy water from it
- Dowell Dowell, IL
Annual water quality report
Duquoin 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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