What environmental databases are included?

This page aggregates data from eight EPA databases: Safe Drinking Water (SDWIS), Superfund/NPL sites, Toxic Release Inventory (TRI), Air Quality Index (AQI), Leaking Underground Storage Tanks (LUST), NPDES water discharge permits, RCRA hazardous waste, and Brownfields.

What does the Air Quality Index (AQI) mean?

AQI is measured on a scale from 0 to 500. Values under 50 are 'Good,' 51-100 is 'Moderate,' and above 100 is 'Unhealthy for Sensitive Groups.' AQI is measured at the county level since air quality monitoring stations are sparse. Your town shares its county's AQI reading.

What is a Superfund site?

A Superfund site is a location contaminated by hazardous waste that has been placed on the EPA's National Priorities List (NPL) for long-term cleanup. These sites pose serious risks to human health and the environment. Cleanup can take decades and cost hundreds of millions of dollars.

Winfield, IL Water Quality, EPA Sites & Air Quality Data

Environmental Reporti

Air Qualityi

44Good

Water Systemsi

2community / 7 total

Water Compliancei

Clean

Active NPDESi

5/ 9 total

Air Quality — DuPage County (2025)i

AQS

The Air Quality Index measures how clean or polluted the air is on a given day. AQI is reported at the county level. A score of 0–50 is considered good; 51–100 is moderate; above 100 may be unhealthy for sensitive groups.

Good

Median AQI

050100150200300

max 158

PM2.5 Daysi

168

Ozone Daysi

105

Drinking Wateri

SDWIS

Public water systems registered to serve this area. Community systems (CWS) provide water to residents year-round. Transient systems serve places like gas stations or restaurants. Violations indicate a system failed to meet federal drinking water standards.

Community Systemsi

Active Systemsi

Recent Violationsi

Transient (5)

Community (2)

Historical Violations (Over 5 Years Ago)

WINFIELD

1 violationLatest: 2020-12-30

EPA

FAMILY MANUFACTURED HOME COMMUNITY, LLC

6 violationsLatest: 2020-01-01

EPA

Wastewater & Stormwater Permits (NPDES)i

NPDES

Under the Clean Water Act, any facility that discharges wastewater or stormwater into rivers, lakes, or streams must hold an NPDES permit. "Effective" means the permit is currently active and the facility is authorized to discharge under its permit conditions.

Active Permitsi

Expired / Terminatedi

27W131 ST. CHARLES ROAD27W131 ST. CHARLES ROADConstruction Stormwater|EPA

OAKWOOD PARK OSLAD GRANT DEVELOPMENT0N555 WINFIELD ROADMinor Discharge|EPA

JONES LAKE MANAGEMENT1S760 EQUESTRIAN CIRCLEMinor Discharge|EPA

GENEVA ROAD BRIDGE OVER WEST BRANCH DUPAGE RIVERGENEVA ROADConstruction Stormwater|EPA

WINFIELD FIRE STATIONNORTHEAST CORNER OF COUNTY FARM RD & CHURCHILL RDConstruction Stormwater|EPA

Nearest Hazardous Waste Disposal Facilitiesi

RCRA

These are the closest licensed facilities where hazardous waste (chemicals, solvents, industrial byproducts) can be legally treated, stored, or disposed of.

SAFETY-KLEEN SYSTEMS INCELGIN11 mi|EPA

Leaking Underground Storage Tanksi

IL EPA

Underground storage tanks (commonly at gas stations) can leak fuel and chemicals into soil and groundwater. "Open" means the leak is still being investigated or cleaned up. "Closed" means the site received a No Further Remediation (NFR) letter — cleanup is done.

Total 13Open 5Closed 8

Open Incidents (5)

Winfield, Village of0 South 048 Winfield Road|#20051466|IL EPA

St. Johns Church233 Church St.|#901298|IL EPA

Central DuPage Hospital25 N Winfield Road|#20240936|IL EPA

Central DuPage Hospital25 North Winfield Rd.|#20030048|IL EPA

Winfield Union 760S151 Winfield Road|#930832|IL EPA