Public water system record
Lyons
Serves Lyons and McCook, Cook County, IL · 10,304 people served
Federal records show no health-based violations and 2 monitoring/reporting issues for Lyons in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 2
Key facts
- Lyons buys its water from Mc Cook.
- Record on file since 1977, with 7 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 2,679 unknown out of 2,679 service lines.
Check whether Lyons 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 |
|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Active |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2020 | Resolved |
Full record since 1977
EPA's records for Lyons 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 5 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1990s | 7 | 4 |
| 2020s | 0 | 2 |
Most recent health-based violation before October 19, 2016: Total Coliform, began June 1998, Archived.
Show all 7 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1998 | Archived |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1996 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1994 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1993 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Dec 7, 1992 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1992 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Mar 1, 1991 | Archived |
Where the water comes from
Lyons buys its water from Mc Cook. It lists no wells or intakes of its own. 1 other public water system has an emergency connection to Lyons.
Buys water from
- Mc Cook McCook, IL
Annual water quality report
Lyons 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