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.

Silex, MO Water Quality, EPA Sites & Air Quality Data

Environmental Reporti

Air Qualityi

42Good

Water Systemsi

3community / 9 total

Water Violationsi

Active NPDESi

10/ 19 total

Air Quality — Lincoln 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 90

PM2.5 Daysi

Ozone Daysi

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 (4)

Community (3)

Non-Transient (2)

Recent Violations (Last 5 Years)

SILEX PWS

87 violationsLatest: 2025-04-23

EPA

Historical Violations (Over 5 Years Ago)

SILEX NURSING CENTER

2 violationsLatest: 2012-01-01

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

WREN HOME405 WOODS RDConstruction Stormwater|EPA

SILEX BANKSTATE HWY. EConstruction Stormwater|EPA

MICK MEHLER AND SONS, INC.99 MEHLER DRIVEMinor Discharge|EPA

BILL SULLIVAN EXCAVATION, INC.68 BUNKER HILL ROADConstruction Stormwater|EPA

SILEX WWTFHIGHWAY EPOTW|EPA

B AND J SEPTIC PUMPING LLC755 MARY JO ROADMinor Discharge|EPA

BILL SULLIVAN EXCAVATION, INC.68 BUNKER HILL ROADConstruction Stormwater|EPA

LINCOLN COUNTY QUARRY32 LIMESTONE LANEIndustrial Stormwater|EPA

HARBISONWALKER TUCKER PROPERTYHIGHWAY UUIndustrial Stormwater|EPA

MAGRUDER LIMESTONE CO. INC.-SILEX330 HWY EMinor Discharge|EPA