County page
St Charles County
St Charles County currently shows 2 Superfund sites, 272 imported facility profiles, and 1,081,551 lbs in loaded TRI releases.
Overview
What this county page is saying
This live county page is generated from the ingested EPA datasets. It merges ECHO facility compliance rows, TRI release totals, and any Superfund sites attached to St Charles County.
The latest loaded TRI year is 2024, with 1,081,551 lbs in county-level on-site releases tied to the imported facility set.
Focus points
Design and product notes
County pages combine facility compliance history with chemical release totals.
TRI chemistry shows what is being reported, while ECHO shows who keeps drawing enforcement attention.
Superfund records add legacy cleanup context even when live contaminant detail is still sparse.
Superfund layer
Cleanup sites in this county
Weldon Spring Former Army Ordnance Works
Weldon Spring Former Army Ordnance Works is in EPA's Superfund layer for St. Charles, MO. Live ingestion currently includes the official EPA detail links and geocoded site record.
Weldon Spring Quarry Plant Pits Usdoe Army
Weldon Spring Quarry Plant Pits Usdoe Army is in EPA's Superfund layer for St. Charles, MO. Live ingestion currently includes the official EPA detail links and geocoded site record.
Facilities
Worst polluters and compliance pressure
General Motors Llc Wentzville Assembly
Violation Identified across 2 of the last 12 quarters, with $3,750 in recorded penalties.
Reckitt Benckiser
Violation Identified across 12 of the last 12 quarters in the imported ECHO record.
Dcsd Steven A. Rogers Wwtp
Violation Identified across 12 of the last 12 quarters in the imported ECHO record.
Sccpwsd#2 Providence Estates Wwtp
Violation Identified across 12 of the last 12 quarters in the imported ECHO record.
Sccpwsd#2, Castlegate Mhp and Providence
Violation Identified across 11 of the last 12 quarters in the imported ECHO record.
Superior Home Products Inc
No Violation Identified across 1 of the last 12 quarters, with $3,000 in recorded penalties.
Fred Weber Inc-o'fallon Stone Plant
Significant Violation across 10 of the last 12 quarters in the imported ECHO record.
North Shore Marina
Violation Identified across 10 of the last 12 quarters in the imported ECHO record.
Ameren Missouri Sioux Energy Center
No Violation Identified across 3 of the last 12 quarters in the imported ECHO record.
Sccpwsd#2, Boone Ridge Estates Wwtf
Violation Identified across 9 of the last 12 quarters in the imported ECHO record.
Cherokee Lakes Campground Wwtp
Violation Identified across 8 of the last 12 quarters in the imported ECHO record.
Montelle Winery-well #1 Treatment
Significant noncompliance across 8 of the last 12 quarters in the imported ECHO record.
Didion & Sons Foundry Co
Significant noncompliance across 7 of the last 12 quarters in the imported ECHO record.
Quarry Wine Garden
Significant Violation across 7 of the last 12 quarters in the imported ECHO record.
The Merry House Inn Wwtf
Significant noncompliance across 6 of the last 12 quarters in the imported ECHO record.
Towne Park
Violation Identified across 6 of the last 12 quarters in the imported ECHO record.
Safety-kleen System
Significant Violation across 5 of the last 12 quarters in the imported ECHO record.
Caliber Collision Center Ofallon Mo South 2573
Violation across 5 of the last 12 quarters in the imported ECHO record.
Jaxson Estates Wwtf
Violation Identified across 5 of the last 12 quarters in the imported ECHO record.
O'fallon Dwtp
Significant noncompliance across 5 of the last 12 quarters in the imported ECHO record.
| Chemical | Group | Facilities | Total pounds |
|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | TRI-listed chemical | 1 | 429,580 lbs |
| Certain glycol ethers | TRI-listed chemical | 1 | 127,200 lbs |
| 1, 2, 4-Trimethylbenzene | Volatile organic compound | 1 | 100,700 lbs |
| Xylene (mixed isomers) | Volatile organic compound | 1 | 73,200 lbs |
| Ammonia | TRI-listed chemical | 1 | 51,360 lbs |
| n-Butyl alcohol | TRI-listed chemical | 1 | 48,000 lbs |
| Cumene | TRI-listed chemical | 1 | 36,000 lbs |
| Manganese compounds | TRI-listed chemical | 2 | 22,069 lbs |
| Zinc compounds | TRI-listed chemical | 3 | 21,654 lbs |
| Vanadium compounds | TRI-listed chemical | 1 | 20,708 lbs |
| Methyl isobutyl ketone | TRI-listed chemical | 1 | 20,210 lbs |
| Styrene | Volatile organic compound | 2 | 16,702 lbs |
| Copper compounds | TRI-listed chemical | 1 | 15,607 lbs |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | TRI-listed chemical | 1 | 14,557 lbs |
| Ethylbenzene | Volatile organic compound | 1 | 14,240 lbs |
| Naphthalene | TRI-listed chemical | 2 | 11,800 lbs |
| N-Methyl-2-pyrrolidone | TRI-listed chemical | 1 | 10,200 lbs |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | TRI-listed chemical | 1 | 10,142 lbs |
| Toluene | Volatile organic compound | 1 | 8,400 lbs |
| Methanol | TRI-listed chemical | 1 | 7,979 lbs |
Violation pages
State-level violation context tied to this county
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Clean Air Act violations in Missouri
Missouri facilities in the imported ECHO data show air-program oversight, inspections, or noncompliance signals.
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Clean Water Act violations in Missouri
Missouri facilities in the imported ECHO data show water-permit pressure, inspections, or noncompliance signals.
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RCRA violations in Missouri
Missouri facilities in the imported ECHO data show hazardous-waste or RCRA oversight signals.