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Public water system record

Naperville

Serves Naperville, Lisle, Warrenville and 1 more place, DuPage County and Will County, IL · 156,406 people served

Federal records show no health-based violations and 16 monitoring/reporting issues for Naperville in the last ten years.

  • IL0434670
  • NAPERVILLE
  • IL
  • 156,406 served

System profile

Source water Purchased surface water
ZIP 60564
EPA system ID IL0434670

Verify this system on EPA ECHO →

Health-based violations, last 10 years
0
Resolved
0
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
16

Key facts

  • Naperville buys its water from Du Page Water Commission.
  • Record on file since 1977, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 265 lead and 29 unknown out of 47,379 service lines.

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Health-based violations

Since October 2016

Violation 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 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Haloacetic Acids (HAA5)
Monitoring and reporting
 Apr 1, 2023 Resolved
Di(2-ethylhexyl) adipate
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
BHC-GAMMA
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Di(2-ethylhexyl) phthalate
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Benzo(a)pyrene
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
HEXACHLOROBENZENE
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
LASSO
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Toxaphene
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Atrazine
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Chlordane
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Heptachlor epoxide
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Methoxychlor
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Hexachlorocyclopentadiene
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Endrin
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Simazine
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Heptachlor
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.

Full record since 1977

EPA's records for Naperville go back to 1977. Before October 19, 2016 they list no health-based violations and 1 monitoring or reporting violation.

Violations that began in Health-based Monitoring and reporting
1970s 0 1
2020s 0 16

Where the water comes from

Naperville buys its water from Du Page Water Commission. EPA also lists 8 wells, all for emergency, seasonal or other part-time use. 7 smaller public systems such as schools, businesses or campgrounds buy water from Naperville. 1 other public water system has an emergency connection to Naperville.

Buys water from

Annual water quality report

Naperville 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