wimby What's in my backyard?

EPA-regulated facilities in St. Charles County, MO

There are 3,501 EPA-regulated facilities inside St. Charles County, Missouri. The most common kinds are water discharge (2,527), hazardous waste (892), air emissions (254). 10 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 42 have a violation on record. Penalties over the last five years total $36k across 5 sites.

Open the map of St. Charles County

3,501facilities in the county
10in significant noncompliance
42with a violation on record
$36kin penalties, last 5 years

By category

CategoryFacilities
Hazardous waste892
Treatment, storage or disposal2
Large quantity generators15
Small quantity generators342
Transporters6
Chemical (RMP/TRI)65
Superfund9
Air emissions254
Major sources7
Synthetic minor sources5
Minor sources165
Water discharge2,527
Major permits10
Minor permits2,402
Drinking water systems57
Greenhouse gas reporters2
Data centers2
Scrap yards3
Recycling centers4

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

Largest penalties

Penalties assessed over the last five years.

Superfund sites

Data centers

Towns in St. Charles County

Bordering counties

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.