Duncan Brothers INC
21516 Main St, Grand Terrace, CA 92316
Present in a source dataset, with no recent operating signal.
What they make
All Other Miscellaneous Fabricated Metal Product Manufacturing332999Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Systems Electronics, INC. | Riverside | Other Electronic Component Manufacturing 334419 | LIKELY ACTIVE | 1.9 KM |
| M. E. Hodge Corporation | Riverside | Machine Shops 332710 | ACTIVE | 2.6 KM |
| US Precision Sheet Metal, INC. | Riverside | Sheet Metal Work Manufacturing 332322 | ACTIVE | 2.9 KM |
| Marlin Machine Products | Riverside | Machine Shops 332710 | ACTIVE | 3.0 KM |
| Harrington Industrial Plastics LLC | Riverside | Plastics Pipe and Pipe Fitting Manufacturing 326122 | REPORTED CLOSED | 3.9 KM |
Also at this address
No other federal record shares this street address.
Where this record comes from
2 sources hold this plant, and 5 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, NPDES · EPA site type STATIONARY.
- EPA ECHO compliance recordsOPERATINGfirst seen MAY 2019 · last seen MAY 2019
- EPA Facility Registry ServiceEXISTENCERecord 110064340459 · first seen MAY 2015 · last seen MAY 2015
IN RIVERSIDE COUNTY52 other plants share this one’s industry (Other Fabricated Metal Product Manufacturing, NAICS 3329); 13 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: DUNCAN BROTHERS INC · OCT 2026
- Street address
- EPA: 21516 MAIN ST · OCT 2026
- City
- EPA: GRAND TERRACE · OCT 2026
- State
- EPA: CA · OCT 2026
- Coordinates
- EPA: 34.019311,-117.334483 · OCT 2026