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 |
|---|---|---|
| 100 MEMORIAL DRIVE ASSOCIATES | Minor source | No |
| 1366 TECHNOLOGIES | Minor source | No |
| 18 PHOENIX PARK LLC | Minor source | No |
| 200 TECHNOLOGY SQUARE | Minor source | No |
| 21ST CENTURY BIOCHEMICALS | Minor source | No |
| 275 WYMAN LLC HOBBS BROOK MANAGEMENT LLC | Minor source | No |
| 290 BINNEY STREET AZ | No | |
| 3M CHELMSFORD | Minor source | No |
| 404 WYMAN LLC HOBBS BROOK MANAGEMENT | Minor source | No |
| 495 NETWORK CENTER | Minor source | No |
| 555 WATERTOWN LLC | Minor source | No |
| 610 LINCOLN STREET LLC | Minor source | No |
| 808 MEMORIAL DRIVE | No | |
| 81 WYMAN LLC OFFICE BUILDING | No | |
| A123 SYSTEMS | No | |
| AA WILL SAND & GRAVEL | Minor source | No |
| ABCAM INC | Minor source | Yes |
| ACCUTEST LABORATORIES OF NEW ENG | Minor source | No |
| ACE LON CORPORATION | Minor source | No |
| ACE-LON CORP | No | |
| ACT ELECTRONICS | Minor source | No |
| ACTON METAL PROCESSING CORP | Minor source | Yes |
| ACTON OPTICS & COATING | Minor source | No |
| ACTON REFINISHING COMPANY | Minor source | No |
| ACUSPHERE INC | Minor source | No |
| ACUSPHERE INC | Minor source | No |
| ADDISON WESLEY COMPANY | Minor source | No |
| ADESA AUCTION OF BOSTON | Synthetic minor source | No |
| ADVANCED MEMBRANE SYSTEMS INC | Minor source | No |
| ADVANCED SURFACE TECHNOLOGY | Minor source | Yes |
| AGENUS | Minor source | No |
| AGGREGATE INDUSTRIES INC | Minor source | No |
| AGGREGATE INDUSTRIES NORTHEAST | Synthetic minor source | No |
| AGGREGATE INDUSTRIES NORTHEAST (HOLCIM) | Synthetic minor source | No |
| AGILENT TECHNOLOGIES | Minor source | No |
| AGILENT TECHNOLOGIES INC | Minor source | No |
| AI USED AUTO PARTS | Minor source | No |
| AIR LIQUID ADVANCED TECHNOLOGIES | Synthetic minor source | Yes |
| ALEXANDRIA REAL ESTATE | Synthetic minor source | No |
| ALEXANDRIA REAL ESTATE EQUITIES INC | Minor source | No |
| ALKERMES INC | Minor source | No |
| ALLCOAT TECHNOLOGY INC | Synthetic minor source | No |
| ALLIED INDUSTRIES | Minor source | No |
| ALLIED WASTE SYSTEMS | Minor source | No |
| ALNYLAM PHARMACEUTALS | Minor source | No |
| ALNYLAM PHARMACEUTICAL | No | |
| ALNYLAM PHARMACEUTICALS | Minor source | No |
| ALPHA AUTO BODY | Minor source | No |
| ALPHA OMEGA AUTO BODY | No | |
| AMAZON.COM LLC - DK01 | No | |
| AMBRI | Minor source | No |
| AMCOR FLEXIBLES HEALTHCARE | Minor source | No |
| AMERICAN DURAFILM CO INC | Minor source | No |
| AMERICAN FURNITURE RENTALS | Minor source | No |
| AMERICAN SCIENCE & TECHNOLOGY | Minor source | No |
| AMERICAN TOWER | No | |
| AMERICRAFT CARTON INC | Minor source | No |
| AMES ON DEMAND | Minor source | No |
| AMETEK AEROSPACE INCORPORATED | Minor source | No |
| AMGEN | Synthetic minor source | No |
| AMRIZE NORTHEAST INC | Synthetic minor source | No |
| AMSPEC | No | |
| ANALOG DEVICES | Minor source | No |
| ANALOG DEVICES INC | Synthetic minor source | No |
| ANALOGIC CORPORATION | Minor source | No |
| ANDE CORPORATION | No | |
| ANDOVER NEWTON THEOLOGICAL SCHOOL | Minor source | No |
| ANGELICA TEXTILE SERVICES | Minor source | No |
| ANIKA THERAPEUTICS INC | Synthetic minor source | No |
| ANJEN FINISHING | Minor source | No |
| ANTONS CLEANERS | Minor source | No |
| AOA XINETICS/ADAPTIVE OPTICS | No | |
| AOTCO METAL FINISHING | Synthetic minor source | No |
| ARC TECH SQUARE LLC | Minor source | No |
| ARDENT MILLS LLC | Minor source | No |
| ARE MA REGION NO 107 OWNER LLC | No | |
| ARIAD PHARMACEUTICALS INC | Minor source | No |
| ARLIN MFG CO INC | Synthetic minor source | No |
| ARLINGTON HOUSING AUTHORITY | Minor source | No |
| ARLINGTON REDEVELOPMENT BOARD | Minor source | No |
| ARQULE INCORPORATED | Emissions classification unknown | No |
| ARTISAN INDUSTRIES INCORPORATED | Minor source | No |
| ASHBURNHAM FINISHING | Minor source | No |
| ASHLAND HIGH SCHOOL | Minor source | No |
| ASHLAND TECHNOLOGY CENTER | Synthetic minor source | No |
| ASTRAZENECA PHARMACEUTICALS LP | Synthetic minor source | No |
| AT&T | Synthetic minor source | No |
| AT&T CAMBRIDGE | Synthetic minor source | No |
| AT&T FRAMINGHAM | Synthetic minor source | No |
| AT&T LITTLETON | Minor source | No |
| AT&T MOBILITY | Minor source | No |
| ATHENA DIAGNOSTICS | Minor source | No |
| ATHENA HEALTH INC | Synthetic minor source | No |
| ATLANTIC BATTERY | Minor source | No |
| AVCARB MATERIAL SOLUTIONS | Synthetic minor source | No |
| AVERICA DISCOVERY SERVICES INC | Minor source | No |
| AVERY DENNISON CORP | Minor source | No |
| AXSUN TECHNOLOGIES | Minor source | No |
| BAE SYSTEMS | Synthetic minor source | No |
| BAKER COMMODITIES | Synthetic minor source | No |
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County as filed on the facility record. Figures from EPA’s ICIS-AIR download.