Mastermold LLC
111 Grell Ln, Johnson Creek, WI 53038
LIKELY ACTIVELAST SEEN IN FEDERAL DATA OCT 2025 · 3 SOURCES
Operating signal within 24 months, or from a single source.
What they make
Custom Compounding of Purchased Resins325991Where it is
43.07619, -88.76893 · CENSUS TIGER
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| US Chemical | Watertown | Soap and Cleaning Compound Manufacturing 325610 | UNVERIFIED | 12.5 KM |
| Hexpol Compounding PC INC Dba Hexpol Whitewater | Whitewater | Custom Compounding of Purchased Resins 325991 | UNVERIFIED | 26.4 KM |
| Epic Resins | Palmyra | Petrochemical Manufacturing 325110 | LIKELY ACTIVE | 25.7 KM |
| Evonikcorporation | Milton | Surface Active Agent Manufacturing 325613 | UNVERIFIED | 36.6 KM |
| Columbus Chemical Industries, INC. | Columbus | All Other Miscellaneous Chemical Product and Preparation Manufacturing 325998 | LIKELY ACTIVE | 35.9 KM |
Also at this address
No other federal record shares this street address.
WHERE THIS RECORD COMES FROM — 3 FEDERAL SOURCES, 6 FIELDS
Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.
EPA cross-references this facility in AIR, AIRS/AFS, CEDRI, EIS, NPDES, OSHA-OIS, RCRAINFO, TRIS, WI-ESR · EPA site type STATIONARY.
| Source | Evidence | First seen | Last seen |
|---|---|---|---|
| EPA ECHO | OPERATING | OCT 2025 | OCT 2025 |
| EPA FRS | EXISTENCE | JUN 2017 | OCT 2024 |
| EPA TRI | OPERATING | DEC 2023 | DEC 2023 |
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
| FIELD | SOURCE | SIGNAL |
|---|---|---|
| ADDRESS LINE1 | EPA FRS | JUL 2026 |
| CITY | EPA FRS | JUL 2026 |
| GEOM | EPA FRS | JUL 2026 |
| NAME | EPA FRS | JUL 2026 |
| RCRA GENERATOR STATUS | EPA ECHO | AUG 2026 |
| STATE | EPA FRS | JUL 2026 |
Status is computed from independent sources; nothing here is self-reported unless marked Claimed.