Public water system record
Dekalb
Serves DeKalb, DeKalb County, IL · 45,000 people served
Federal records show no health-based violations and 4 monitoring/reporting issues for Dekalb 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
- 4
Key facts
- Dekalb draws water from 9 wells.
- Most recent formal enforcement: compliance order (no penalty) by Illinois, June 1991.
- Record on file since 1977, with 7 health-based violations before October 19, 2016.
- Lead pipe inventory: 98 lead and 128 unknown out of 10,714 service lines.
Check whether Dekalb 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.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2025 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jun 1, 2018 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
Full record since 1977
EPA's records for Dekalb go back to 1977. Before October 19, 2016 they list 7 health-based violations (4 resolved, 3 archived by EPA without a recorded fix) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1990s | 7 | 2 |
| 2010 to October 18, 2016 | 0 | 1 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 0 | 2 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began December 1998, Resolved.
Show all 7 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Dec 1, 1998 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 1995 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Dec 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1992 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 1992 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 1991 | Archived |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Dec 21, 1990 | Resolved |
Enforcement actions
Illinois regulators took 1 formal enforcement action against Dekalb in 1991. The most recent was a compliance order (no penalty) in June 1991.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jun 20, 1991 | Illinois | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
Where the water comes from
Dekalb draws water from 9 wells. 1 other community water system and 3 smaller public systems such as schools, businesses or campgrounds buy water from Dekalb.
Community systems that buy water from it
- Northern Illinois University-Dekalb Dekalb, IL
Annual water quality report
Dekalb 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