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.

Thiensville, WI Water Quality, EPA Sites & Air Quality Data

CSAMilwaukee-Racine-Waukesha MSAMilwaukee-Waukesha#32/60 Home Value

Environmental Reporti

Water Systemsi

7community / 62 total

Water Violationsi

Active NPDESi

1/ 2 total

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 (40)

Community (7)

Non-Transient (3)

Recent Violations (Last 5 Years)

ALBERTA SUBDIVISION

7 violationsLatest: 2022-09-01

EPA

CENTURY ESTATES 1

8 violationsLatest: 2025-10-01

EPA

VILLAGE HEIGHTS

2 violationsLatest: 2025-07-02

EPA

Historical Violations (Over 5 Years Ago)

CENTURY ESTATES 3

4 violationsLatest: 2007-11-08

EPA

WE ENERGIES -CENTURY ESTATES 2

13 violationsLatest: 2002-10-01

EPA

LAUREL ACRES

3 violationsLatest: 2004-01-01

EPA

WE ENERGIES - PINE RIDGE ESTATES

1 violationLatest: 2001-07-01

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

LAKESIDE DEVELOPMENT COMPANY200 GREEN BAY ROADMinor Discharge|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.

VEOLIA ES TECHNICAL SOLUTIONS LLCMENOMONEE FALLS5.5 mi|EPA

TRADEBE TREATMENT AND RECYCLING OF WI LLCMILWAUKEE5.8 mi|EPA

BRENNTAG GREAT LAKES LLCMENOMONEE FALLS9.6 mi|EPA

VEOLIA ES TECHNICAL SOLUTIONS LLCPORT WASHINGTON10.5 mi|EPA

EV Charging & Alternative Fuel Stationsi

AFDC

Publicly listed alternative fuel and EV charging stations within the municipality. Data from the U.S. Department of Energy. "Open" stations are currently available for use; "Planned" stations are approved but not yet operational.

Total Stationsi

EV Stationsi

DC Fast Portsi

SYNERGEV

Gordie Boucher Ford of Thiensville121 N. Main StreetElectric4 DCSYNERGEV