Public water system record
Williamsville
Serves Williamsville and Sherman, Sangamon County, IL · 6,198 people served
Federal records show no health-based violations and 2 monitoring/reporting issues for Williamsville 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
- 2
Key facts
- Williamsville buys its water from Springfield.
- Lead pipe inventory: 0 lead and 0 unknown out of 2,581 service lines.
Check whether Williamsville 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 |
|---|---|---|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
Where the water comes from
Williamsville buys its water from Springfield. It lists no wells or intakes of its own. 1 smaller public system such as schools, businesses or campgrounds buys water from Williamsville.
Buys water from
- Springfield Springfield, IL
Annual water quality report
Williamsville 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