Public water system record
Waterloo
Serves Waterloo, Monroe County, IL · 10,190 people served
Federal records show no health-based violations and 31 monitoring/reporting issues for Waterloo 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
- 31
Key facts
- Waterloo draws water from 3 wells.
- Record on file since 1977, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 4,862 service lines.
Check whether Waterloo 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 |
|---|---|---|
|
Nitrite
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Nitrate
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Styrene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Toluene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Benzene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
|
Chlorine
Monitoring and reporting
|
Dec 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2024 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
Full record since 1977
EPA's records for Waterloo go back to 1977. Before October 19, 2016 they list 1 health-based violation (1 archived by EPA without a recorded fix) and 6 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1990s | 1 | 4 |
| 2000s | 0 | 1 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 0 | 29 |
Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began July 1993, Archived.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 1993 | Archived |
Where the water comes from
Waterloo draws water from 3 wells. It also has an emergency connection to IL American-East St Louis. 3 smaller public systems such as schools, businesses or campgrounds buy water from Waterloo.
Emergency or part-time connections to
- IL American-East St Louis Godfrey, IL
Annual water quality report
Waterloo 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