County · Illinois

DuPage County, Illinois: drinking water records

Name: Drinking water records for DuPage County, Illinois
Creator: U.S. Environmental Protection Agency
License: https://www.usa.gov/government-works

Explore EPA records for 48 community water systems across 37 ZIP codes in DuPage County, then find water-testing resources and available recent monitoring-station readings.

In focus48Community water systems

Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

Drinking-water records

EPA survey and compliance records are historical reports. UCMR 5 results are available for 32 of the 48 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

systems in EPA's PFAS survey

systems where PFAS was found

systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses

systems that have reached the lead action level

systems with a health-based violation since 2016

System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.

Water systems in this county

All 48 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.

Water system	People served	PFAS survey results	PFAS found	Health-based violations	Lead, 9 in 10 homes at or below
Prairie Path Water Company-Clarendon IL0435300	625	60	0	1	1.4 ppbbelow the action level
Naperville IL0434670	156,406	120	0	0	7.1 ppbbelow the action level
Wheaton IL0431050	53,970	120	0	0	1.5 ppbbelow the action level
Downers Grove IL0430300	49,425	120	0	0	4.2 ppbbelow the action level
Elmhurst IL0430350	45,000	120	1	0	7.2 ppbbelow the action level
Lombard IL0430600	44,476	120	0	0	11.2 ppbbelow the action level
Carol Stream IL0430200	39,854	240	1	0	0.8 ppbbelow the action level
Addison IL0430050	38,017	120	0	0	4.7 ppbbelow the action level
Woodridge IL0431250	33,566	120	0	0	1.8 ppbbelow the action level
Glendale Heights IL0430400	33,176	120	0	0	1.5 ppbbelow the action level
Glen Ellyn IL0430450	28,850	120	0	0	2.8 ppbbelow the action level
West Chicago IL0430900	25,166	60	0	0	0.9 ppbbelow the action level
Lisle IL0430551	24,223	120	0	0	0 ppbbelow the action level
Westmont IL0430950	24,161	120	0	0	8.3 ppbbelow the action level
Roselle IL0434820	22,897	120	0	0	3.8 ppbbelow the action level
Villa Park IL0430800	22,263	120	0	0	8.9 ppbbelow the action level
Bloomingdale IL0430100	22,018	120	0	0	1.3 ppbbelow the action level
Darien IL0430270	21,751	120	0	0	1.4 ppbbelow the action level
Bensenville IL0434140	18,537	120	0	0	6.3 ppbbelow the action level
Hinsdale IL0434520	17,900	120	0	0	5 ppbbelow the action level
Wood Dale IL0431200	14,012	120	0	0	0 ppbbelow the action level
Warrenville IL0430833	12,350	240	0	0	1.7 ppbbelow the action level
Burr Ridge IL0434190	11,192	120	0	0	0 ppbbelow the action level
Winfield IL0431150	9,835	120	0	0	0 ppbbelow the action level
Itasca IL0430500	9,506	240	1	0	0.9 ppbbelow the action level
Oak Brook IL0430700	9,400	120	0	0	0.8 ppbbelow the action level
Willowbrook IL0431100	9,000	120	0	0	0 ppbbelow the action level
Clarendon Hills IL0430250	8,702	120	0	0	6.9 ppbbelow the action level
Southeast Regional Water Facility IL0430060	6,940	120	0	0	0 ppbbelow the action level
Il American-Valley View IL0437350	6,721	120	1	0	0 ppbbelow the action level
Il American-Liberty Ridge West IL0435650	3,307	120	0	0	0 ppbbelow the action level
Il American-Country Club IL0435350	1,014	120	0	0	0 ppbbelow the action level
Liberty Park Homeowners Association IL0435600	950	0	0	1	6.2 ppbbelow the action level
Wood Dale Estates IL0437245	145	0	0	1	0 ppbbelow the action level
Il American-Dupage Utility IL0430552	6,613	0	0	0	0 ppbbelow the action level
Aqua Illinois-Oak Brook IL0430055	5,361	0	0	0	1.3 ppbbelow the action level
Glen Ellyn Heights Subdivision IL0435500	1,931	0	0	0	0 ppbbelow the action level
Steeple Run Sbdv IL0437160	1,931	0	0	0	1.3 ppbbelow the action level
Il American-Arrowhead IL0435150	1,581	0	0	0	0 ppbbelow the action level
Oakbrook Terrace IL0430750	1,440	0	0	0	0 ppbbelow the action level
York Township Water System IL0430010	1,423	0	0	0	0 ppbbelow the action level
North Regional Water Fac IL0435850	770	0	0	0	0 ppbbelow the action level
Il American-Lombard Heights IL0435700	679	0	0	0	0 ppbbelow the action level
Hobson Valley Water System IL0430040	400	0	0	0	0 ppbbelow the action level
Il American-Liberty Ridge East IL0437500	320	0	0	0	0 ppbbelow the action level
Pleasant Ridge MHP IL0435945	284	0	0	0	0 ppbbelow the action level
Polo Dr and Saddle Rd Subdivision IL0437000	93	0	0	0	10 ppbbelow the action level
Du Page Water Commission IL0435400	1	0	0	0	not reported

USGS · Monitoring stations

The water, more recently.

Available station readings in DuPage County, Illinois. Each measurement keeps its time, unit and original source.

These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.

Recent observations load when this section comes into view.

How these readings update

We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.

Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.

Your next step

Water testing, reports & local help.

Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.

Official national directories

Water testing

Find your state’s private-well program

EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-05

Water testing

Find a certified drinking-water laboratory

Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-11

Public records

Find your utility’s Consumer Confidence Report

EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-09-09

Public records

Explore USGS water observations

Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.

U.S. Geological Survey
Source reviewed 2026-09-15

A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.

Understand water testing and laboratory reports

Resource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction

Explore your area

Local coverage in DuPage County

37ZIP areas in this overview

Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.

Towns and communities

Addison
Aurora
Bartlett
Bensenville
Bloomingdale
Burr Ridge
Carol Stream
Clarendon Hills
Darien
Downers Grove
Elmhurst
Glen Ellyn
Glendale Heights
Hanover Park
Hinsdale
Itasca
Lisle
Lombard
Naperville
Oak Brook
Roselle
Villa Park
Warrenville
Wayne
West Chicago
Westmont
Wheaton
Winfield
Wood Dale
Woodridge

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

60101Addison
60103Bartlett
60106Bensenville
60108Bloomingdale
60126Elmhurst
60133Hanover Park
60137Glen Ellyn
60139Glendale Heights
60143Itasca
60148Lombard
60157Roselle
60172Roselle
60181Villa Park
60184Wayne
60185West Chicago
60187Wheaton
60188Carol Stream
60189Wheaton
60190Winfield
60191Wood Dale
60502Aurora
60504Aurora
60514Clarendon Hills
60515Downers Grove
60516Downers Grove
60517Woodridge
60519Aurora
60521Hinsdale
60523Oak Brook
60527Burr Ridge
60532Lisle
60540Naperville
60555Warrenville
60559Westmont
60561Darien
60563Naperville
60565Naperville

These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.

Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.

Beyond this county page

Keep reading. Compare nearby.

PFASChoosing a PFAS filterPFAS was found in 4 of the 32 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadChoosing a lead filter13 systems here have reached the lead action level. See how to check a filter’s lead-reduction certification.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near DuPage County

All Illinois counties

Sources and scope

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.

Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.