Perimeter Solutions Ontario Seat Base

What they make

Where it is

Location not verified — this address could not be matched to Census TIGER, so the facility is not placed on the map.

Other plants nearby

No other listed facility within 40 km shares this one’s four-digit industry code, or this record has no coordinates to measure from.

Also at this address

No other federal record shares this street address.

Where this record comes from

1 source holds this plant, and 6 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 RCRAINFO · EPA site type STATIONARY.

• EPA Facility Registry ServiceEXISTENCE
  Record 110071248785 · first seen APR 2022 · last seen APR 2022

IN MALHEUR COUNTY1 other plant shares this one’s industry (Basic Chemical Manufacturing, NAICS 3251); 0 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: PERIMETER SOLUTIONS ONTARIO SEAT BASE · NOV 2026

Street address

EPA: LAT 44.116797 LONG -117.037746 · NOV 2026

City

EPA: ONTARIO HEIGHTS · NOV 2026

State

EPA: OR · NOV 2026

County (FIPS code)

EPA: 41045 · NOV 2026

Hazardous waste generator (RCRA)

EPA ECHO: VSQG · NOV 2026