Triangle Plating Co-triangle Plating CO

What they make

Where it is

Other plants nearby

Every listed plant in St. Louis County

Also at this address

No other federal record shares this street address.

Where this record comes from

2 sources hold this plant, and 7 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

EPA cross-references this facility in AIR, AIRS/AFS, CEDRI, EIS, ICIS, MO-DNR, RCRAINFO · EPA site type STATIONARY.

• EPA Facility Registry ServiceEXISTENCE
  Record 110009412466 · first seen JUL 2020 · last seen JUL 2020
• EPA ECHO compliance recordsOPERATING
  first seen APR 2016 · last seen APR 2016

IN ST. LOUIS COUNTY28 other plants share this one’s industry (Coating, Engraving, Heat Treating, and Allied Activities, NAICS 3328); 12 of them have a size band on record.

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

Name

EPA: TRIANGLE PLATING CO-TRIANGLE PLATING CO · OCT 2026

Street address

EPA: 4550 POPE · OCT 2026

City

EPA: ST. LOUIS · OCT 2026

State

EPA: MO · OCT 2026

County (FIPS code)

EPA: 29510 · OCT 2026

Coordinates

EPA: 38.67778,-90.22886 · OCT 2026

Hazardous waste generator (RCRA)

EPA ECHO: none · OCT 2026