Public water system record
York Township Water System
Serves Oakbrook Terrace, DuPage County, IL · 1,423 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for York Township Water System 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
- 1
Key facts
- York Township Water System buys its water from Du Page Water Commission.
- Most recent formal enforcement: signed compliance agreement by Illinois, January 2011.
- Record on file since 1992, with 7 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 443 service lines.
Check whether York Township Water System 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 | Active |
Full record since 1992
EPA's records for York Township Water System go back to 1992. Before October 19, 2016 they list 7 health-based violations (3 resolved, 4 archived by EPA without a recorded fix) and 52 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 3 | 44 |
| 2000s | 4 | 3 |
| 2010 to October 18, 2016 | 0 | 5 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Lead and Copper Rule, began August 2009, Resolved.
Show all 7 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Treatment technique failure
|
Aug 22, 2009 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2007 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 2006 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2002 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 1998 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1993 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1992 | Archived |
Enforcement actions
Illinois regulators took 3 formal enforcement actions against York Township Water System between 2000 and 2011. The most recent was a signed compliance agreement in January 2011.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jan 7, 2011 | Illinois | Signed compliance agreement | 1 violation: Consumer Confidence Rule |
| Feb 18, 2010 | Illinois | Signed compliance agreement | 1 violation (1 health-based): Lead and Copper Rule |
| Mar 28, 2000 | Illinois | Signed compliance agreement | 1 violation: Consumer Confidence Rule |
Where the water comes from
York Township Water System buys its water from Du Page Water Commission. It lists no wells or intakes of its own.
Buys water from
- Du Page Water Commission Elmhurst, IL
Annual water quality report
York Township Water System 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