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.

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

Environmental Reporti

Water Systemsi

3community / 31 total

Water Violationsi

TRI Facilitiesi

Active NPDESi

4/ 10 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 (23)

Non-Transient (5)

Community (3)

Recent Violations (Last 5 Years)

LEROY SANITARY DISTRICT 1

12 violationsLatest: 2024-12-02

EPA

Historical Violations (Over 5 Years Ago)

MAYVILLE WATERWORKS

2 violationsLatest: 2017-11-15

EPA

Toxic Release Inventory (TRI)i

TRI

Factories, refineries, and other industrial facilities that use or store hazardous chemicals are required to report their releases annually to the EPA. Being listed here does not mean a violation occurred — it means the facility is transparently tracking its chemical usage.

Reporting Facilitiesi

With Chemical Datai

GLEASON REEL600 S CLARK ST5 chemicals|TRI

METALCRAFT OF MAYVILLE1000 METALCRAFT DR5 chemicals|TRI

MAYVILLE PRODUCTS CORPORATION403 DEGNER AVE5 chemicals|TRI

MAYVILLE ENG. CO. INC. - MAYVILLE715 SOUTH ST4 chemicals|TRI

WYMAN GORDON MAYVILLE DIE & TOOL700 N FURNACE ST3 chemicals|TRI

MAYSTEEL LLC MAYVILLE DIV800 HORICON ST|TRI

RUMAR MFG CO925 SOUTH ST|TRI

PILLSBURY CO500 S CLARK ST|TRI

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

SCHILLING AUTO SALVAGEW1521 CTY RD AMinor Discharge|EPA

MARSHVIEW SELF STORAGE LLC SITESOUTHWEST CORNER OF THE INTERSECTION OF BIRD ROADMinor Discharge|EPA

HOCKERS RIVER KNOLL STORAGE UNITS SITENE OF RIVER KNOLL DRIVE & HILLTOP DRMinor Discharge|EPA

POPPLE RIDGE MENNONITE CHURCH SITE15556 HI LINE AVENUEMinor Discharge|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

Level 2 Portsi

Tesla Destination

The Audubon Inn & NOLA North Grille - Tesla Destination45 North Main StElectric3 L2Tesla Destination