EPA-regulated facilities near Dardenne Prairie, MO

There are 1,022 EPA-regulated facilities within 5 miles of Dardenne Prairie, Missouri. The most common kinds are water discharge (769), hazardous waste (217), air emissions (52). 3 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 11 have a violation on record. Penalties over the last five years total $21k across 2 sites.

Open the map here

1,022facilities within 5 miles

3in significant noncompliance

11with a violation on record

$21kin penalties, last 5 years

By category

Category	Facilities
Hazardous waste	217
Large quantity generators	2
Small quantity generators	88
Transporters	1
Chemical (RMP/TRI)	13
Superfund	3
Air emissions	52
Major sources	2
Synthetic minor sources	1
Minor sources	39
Water discharge	769
Major permits	2
Minor permits	740
Drinking water systems	31
Data centers	2

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.

WELDON SPRINGS TRAINING AREA 251 SOLDIERS DR., ST CHARLES, MO, 63304 · 2.9 mi Significant noncompliance
DARDENNE PRAIRIE SM MS4 2032 HANLEY RD, O'FALLON, MO, 63368 · 3.5 mi Significant noncompliance
BMC O'FALLON 1440 TERRA LANE WEST, O'FALLON, MO, 63366 · 4.7 mi Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

A SQUARE SYSTEMS INC. 808 CORPORATE CENTRE DRIVE, O'FALLON, MO, 63368 · 1.5 mi $20k in penalties
TAKE 5 OIL CHANGE 6191 MID RIVERS MALL DRIVE, ST. PETERS, MO, 63304 · 4.3 mi $1k in penalties

Superfund sites

WELDON SPRINGS CHEMICAL PLANT HWY 94 2 MI S US 40, ST CHARLES, MO, 63301 · 3.1 mi
WELDON SPRING QUARRY/PLANT/PITS (USDOE/ARMY) 25 MI W OF ST LOUIS, ST. CHARLES, MO, 63301 · 3.1 mi
WELDON SPRING FORMER ARMY ORDNANCE WORKS ST HWY 94 2 MI S US 40, ST. CHARLES, MO, 63301 · 3.2 mi

Data centers

CENTENE DATA CENTER WATERBURY AND WELDON SPRING RD - LOT A, O FALLON, MO, 63376 · 1.0 mi
CENTENE DATA CENTER 6430 WELDON SPRING DRIVE, OFALLON, MO, 63304 · 2.0 mi

County

St. Charles County

Nearby towns

O'Fallon 3 mi
Lake St. Louis 5 mi
St. Peters 7 mi
Chesterfield 9 mi
Wentzville 10 mi
St. Charles 11 mi
Wildwood 12 mi
Ellisville 13 mi

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. Distances are from the center of Dardenne Prairie as the Census Bureau records it. The Data page explains where each record comes from and how it can mislead.