EPA Air · by county
Air-emissions sources in Middlesex County, Massachusetts
- 932Facilities
Every stationary source in Middlesex County, Massachusetts that holds a Clean Air Act permit or is otherwise tracked by an air agency — planned, under construction, operating, seasonal or temporarily closed. Sources EPA records as permanently closed are not listed.
By emissions classification in Middlesex County
A source’s classification is the size band its potential emissions put it in: a major source is large enough to need a Title V operating permit, a synthetic minor has accepted limits to stay below that line, and a minor source sits below it outright.
Inspections in Middlesex County, by year
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source.
- 2026 — inspections 124
- 2025 — inspections 190
- 2024 — inspections 185
- 2023 — inspections 106
- 2022 — inspections 63
- 2021 — inspections 100
- 2020 — inspections 103
- 2019 — inspections 132
- 2018 — inspections 127
- 2017 — inspections 169
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| EDWARDS VACUUM LLC | No | |
| EH SARGENT WATER TREATMENT | Minor source | No |
| EISAI INC | No | |
| ELECTROCHEM CANTON | Minor source | No |
| ELECTRONIC RECYCLERS INTERNATIONAL MA | Minor source | No |
| EMC | Minor source | No |
| EMC CORPORATION | Synthetic minor source | No |
| EMC CORPORATION | Synthetic minor source | No |
| EMC CORPORATION | Synthetic minor source | No |
| EMCO PRINTERS INCORP | Minor source | No |
| EMD MILLIPORE | No | |
| EMD MILLIPORE CORPORATION | Synthetic minor source | No |
| EMD SERONO RESEARCH INST | Minor source | No |
| EMERSON & CUMING COMPOSITE MATERIALS INC | Minor source | No |
| EMERSON HOSPITAL | Synthetic minor source | No |
| EMPIRE LINEN | Minor source | No |
| ENCORE BOSTON HARBOR | Minor source | No |
| ENDLESS ENERGY HOME SERVICES | Minor source | No |
| ENERGY SCIENCES INCORPORATED | Minor source | No |
| ENJET AERO MALDEN LLC | No | |
| ENSEMBLE THERAPEUTICS CORP | Minor source | No |
| ENTEGRIS INC | Synthetic minor source | Yes |
| ENTEGRIS INC | Synthetic minor source | No |
| ENTWISTLE COMPANY THE | Synthetic minor source | No |
| EQUITY OFFICE PROPERTIES | Minor source | No |
| EVERETT HIGH SCHOOL | Minor source | No |
| EVERGREEN SOLAR, INC. | Minor source | No |
| FACTORIAL INC | Yes | |
| FARLEY SCHOOL | Minor source | No |
| FARLEY WHITE PAWTUCKET LLC | Minor source | No |
| FASTCAP SYSTEMS CORP DBA NANORAMIC LABS | Minor source | No |
| FASTCAP SYSTEMS DBA NANORAMIC LABORATORIES | No | |
| FENWAL SAFETY SYSTEMS | Minor source | No |
| FERNALD CENTER | Synthetic minor source | No |
| FIBA TECHNOLOGIES INC | No | |
| FIDELITY INVESTMENTS | Minor source | No |
| FIDELITY PRESS INCORPORATED | Minor source | No |
| FINCH THERAPEUTICS INC | No | |
| FINISH UNLIMITED INCORPORATED | Synthetic minor source | No |
| FM CALLAHAN & SONS | Minor source | No |
| FOREST CITY UNIVERSITY PARK AT MIT | Synthetic minor source | No |
| FORMLABS, INC. | Minor source | No |
| FORSYTH INSTITUTE | Minor source | No |
| FOURSTAR CONNECTIONS INC | Minor source | No |
| FRAEN CORPORATION | Minor source | No |
| FRAEN MACHINING CORPORATION | Minor source | No |
| FRAMINGHAM FORD LINCOLN | Minor source | No |
| FRAMINGHAM HIGH SCHOOL | Minor source | No |
| FRAMINGHAM HOUSING A | Minor source | No |
| FRAMINGHAM SALVAGE CO. | Minor source | No |
| FRAMINGHAM STATE UNIVERSITY | Synthetic minor source | Yes |
| FRANCIS CABOT LOWELL MILL | No | |
| FRANCIS WYMAN ELEMENTARY SCHOOL | Minor source | No |
| FRESH POND APARTMENT | Minor source | No |
| FUJIFILM MICRODISKS | Minor source | No |
| FULLER SYSTEM INC | Minor source | No |
| FW LOMBARD COMPANY | Minor source | No |
| GALVIN MIDDLE SCHOOL | Minor source | No |
| GATEWAY @ MALDEN CENTER | Minor source | No |
| GE HEALTHCARE | Minor source | No |
| GE INFRASTRUCTURE SENSING INC | Synthetic minor source | No |
| GEARTRONICS CORP | Minor source | No |
| GELTEX PHARMACEUTICALS, INC DBA | Minor source | No |
| GENERAL CHEMICAL CORPORATION | Minor source | No |
| GENERAL ELECTRIC INTERNATIONAL INC | Not applicable | No |
| GENERAL STEEL PRODUCTS | Minor source | No |
| GENERAL WOODWORKING INC | Minor source | No |
| GENZYME CORPORATION | Minor source | No |
| GENZYME CORPORATION | Synthetic minor source | No |
| GENZYME CORPORATION | Minor source | No |
| GEORGE MEADE FOUNDRY | Minor source | No |
| GETRONICS | Minor source | No |
| GFI/BIG JOE LLC | Minor source | No |
| GLENS FALLS LEHIGH CEMENT COMPANY | Minor source | No |
| GOOD HUMOR BREYERS ICE CREAM | Minor source | No |
| GORDON MINDICK PROPERTIES | Minor source | No |
| GOTHAM INK CORPORATION | Minor source | No |
| GRANITE STATE-WESTFORD | Synthetic minor source | No |
| GRANITEVILLE MATERIALS | Minor source | No |
| GRAVES GRANITE | No | |
| GREATER BOSTON GASTROENTEROLOGY | Yes | |
| GREATER BOSTON YMCA | Minor source | No |
| GREEN ANALYTICS MASSACHUSETTS | No | |
| GREENTOWN COLLABORATIVE INC | No | |
| GROTON SCHOOL | Minor source | No |
| GROTON SCREW MACHINE CO | Minor source | No |
| GUTIERREZ COMPANY THE | Synthetic minor source | No |
| H LAROSEE & SONS | Minor source | No |
| HAARTZ CORP | Synthetic minor source | No |
| HARVARD UNIVERSITY | Major source | No |
| HARVARD UNIVERSITY RADCLIFFE | Synthetic minor source | No |
| HC STARCK INCORPORATED | Minor source | No |
| HCP/KING HAYDEN CAMPUS LLC | Synthetic minor source | No |
| HEALEY SCHOOL | Minor source | No |
| HEATH BROOK SCHOOL | Minor source | No |
| HEIMLICH NURSERIES | Minor source | No |
| HERB CONNOLLY ACURA | No | |
| HERB CONNOLLY CHEVY/HYUNDAI | Minor source | No |
| HIGH TECH TURNING | Minor source | No |
| HILDRETH SCHOOL | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.