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.

Mount Sterling, OH Water Quality, EPA Sites & Air Quality Data

Environmental Reporti

Air Qualityi

43Good

Water Systemsi

2community / 18 total

Water Violationsi

TRI Facilitiesi

Active NPDESi

2/ 4 total

Air Quality — Madison 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 112

PM2.5 Daysi

Ozone Daysi

213

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 (15)

Community (2)

Non-Transient (1)

Recent Violations (Last 5 Years)

MOUNT STERLING VILLAGE PWS

17 violationsLatest: 2025-12-30

EPA

Historical Violations (Over 5 Years Ago)

SUNSET MOBILE HOME PARK

2 violationsLatest: 1994-07-01

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

SHOWA ALUMINUM CORP OF AMERICA10500 O'DAY-HARRISON RD5 chemicals|TRI

MAHLE BEHR MT STERLING INC.10500 O'DAY-HARRISON ROAD5 chemicals|TRI

STEPHEN'S PIPE & STEEL INC10732 SCHADEL LN3 chemicals|TRI

CROP PRODUCTION SERVICES INC249 W CHESTNUT ST3 chemicals|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

MOUNT STERLING WWTP275 SOUTH LONDON STBiosolids|EPA

WILLOWWOOD GLOBAL LLC15441 SCIOTO DARBY RDMinor Discharge|EPA