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 |
|---|---|---|
| CENTERLINE TECHNOLOGIES LLC | Minor source | No |
| CHAMPAGNE LAFAYETTE COMMUNICATIONS INC | Minor source | No |
| CHAMPION CLEANERS | Minor source | No |
| CHAPEL BRIDGE PARK ASSOCIATES | Minor source | No |
| CHARLES RIVER LABORATORIES | Synthetic minor source | No |
| CHARLES STARK DRAPER LABORATORY INC | Minor source | No |
| CHASE MILLS | Minor source | No |
| CHASE WALTON ELASTOMERS | Minor source | No |
| CHELMSFORD HIGH SCHOOL | Minor source | No |
| CHEMGENES CORPORATION | Minor source | No |
| CHEMIC LABORATORIES | Minor source | No |
| CHEVY OF LOWELL | Minor source | No |
| CHOMERICS DIVISION | Minor source | No |
| CHROME PLATING OF WALTHAM | Minor source | No |
| CHURCHILL CORP | Synthetic minor source | No |
| CIMENT QUEBEC INC | Synthetic minor source | No |
| CINTAS CORPORATION | Synthetic minor source | No |
| CINTAS CORPORATION | Minor source | No |
| CINTAS CORPORATION 16 | Minor source | No |
| CISCO SYSTEMS INC | Synthetic minor source | No |
| CITY EXPRESS CLEANERS | Minor source | No |
| CLARENDON HILL TOWER | Minor source | No |
| CN CUSTOM CABINETS | Minor source | No |
| COAN INC | Minor source | No |
| COATING APPLICATION TECHNOLOGIES | Minor source | No |
| COHEN DERMATOPATHOLOGY PC | Minor source | No |
| COLDSNAP | No | |
| COLEMAN MANUFACTURING | Minor source | No |
| COLONIAL GAS CO DBA NATIONAL GRID | Minor source | No |
| COLONIAL GAS TEWKSBURY LNG | Synthetic minor source | No |
| COLONIAL PRINT COMPANY INC | Minor source | No |
| COMCAST OF MASSACHUSETTS I INC | Minor source | No |
| COMCAST OF MASSACHUSETTS I INC | Minor source | No |
| COMCAST OF MASSACHUSETTS III, INC | Minor source | No |
| COMMCAN INC | No | |
| COMMTANK INC | No | |
| COMPASS PACKAGING INTERNATIONAL | No | |
| CONCORD CARLISE HIGH SCHOOL | Minor source | No |
| CONSTELLATION FRAMINGHAM LLC | Major source | No |
| COPLEY CONTROLS | Minor source | No |
| CORESITE RE 70 INNERBELT LLC | Synthetic minor source | No |
| CORNING INTELLISENSE | Minor source | No |
| COURIER NORTH CHELMSFORD | Minor source | No |
| COURT CLEANERS | Minor source | No |
| COVINO ENVIRONMENTAL ASSOCIATES INC | Minor source | No |
| CPF CO-OP INC | Minor source | No |
| CPI RADIANT TECHNOLOGIES DIVISION | Synthetic minor source | No |
| CREATIVE MATERIALS | Synthetic minor source | No |
| CREST BUICK NISSAN PUEGEOT | Minor source | No |
| CRIMSON CLEANERS | Minor source | No |
| CRISPR THERAPEUTICS | No | |
| CROSSPOINT LIMITED | Minor source | No |
| CSL SEQIRUS | No | |
| CUMBERLAND FARMS INC | Synthetic minor source | No |
| CURIA MASSACHUSETTS INC | No | |
| CURTISS WRIGHT SURFACE TECHNOLOGIES | No | |
| CXYTERA-BO-2 | Synthetic minor source | No |
| CYXTERA BO-3 | Synthetic minor source | No |
| DAMPNEY COMPANY INC | Synthetic minor source | No |
| DAV-TECH PLATING INC | Minor source | No |
| DAVOL | No | |
| DCR AMELIA EARHART DAM | Synthetic minor source | Yes |
| DEACONESS NASHOBA HO | Minor source | No |
| DEK PORTFOLIOS LLC | Minor source | No |
| DELEWARE VALLEY CORP | Minor source | No |
| DELUXE CORPORATION | Minor source | No |
| DENTSPLY IMPLANTS | Minor source | No |
| DESKTOP METAL | Minor source | Yes |
| DIAMOND DIAGNOSTICS | Minor source | No |
| DICERNA PHARMACEUTICALS | No | |
| DIGITAL 55 MIDDLESEX LLC | Synthetic minor source | No |
| DIGITAL FEDERAL CREDIT UNION | Minor source | No |
| DIGITAL FEDERAL CREDIT UNION | Minor source | No |
| DIGITAL FEDERAL CREDIT UNION | Synthetic minor source | No |
| DISCOVERY LABWARE | No | |
| DISTRIGAS OF MASSACHUSETTS LLC | Major source | No |
| DIV CABOT ROAD LLC | Synthetic minor source | No |
| DOBLE ENGINEERING COMPANY | Minor source | No |
| DODGE CO INC, THE | Minor source | No |
| DOWINDUSTRIES | Minor source | No |
| DRAPER PROPERTIES INCORPORATED | Synthetic minor source | No |
| DREWS POWDER COATING LLC | No | |
| DS GRAPHICS | Minor source | No |
| DSM - NEORESINS | Synthetic minor source | No |
| DUDS CLEANERS | Minor source | No |
| DUNCAN GROUP THE | Synthetic minor source | Yes |
| DURALECTRA INCORPORATED | Minor source | No |
| DUSA PHARMACEUTICALS INC | Minor source | No |
| DUTTON YARN COMPANY | Minor source | No |
| DXC TECHNOLOGY SERVICES LLC | Minor source | No |
| DYNAGRAF INC | Minor source | No |
| E INK CORPORATION | Synthetic minor source | No |
| EARTHLINK BUSINESS | Synthetic minor source | No |
| EAST WEST ENTERPRISE | Minor source | No |
| EASTERN BUS COMPANY, INC | Minor source | No |
| EASTERN BUS COMPANY, INC | Minor source | No |
| EASTERN CLEANERS COR | Minor source | No |
| EC WHITNEY & SONS | Minor source | No |
| ECRM | Minor source | No |
| EDWARDS VACUUM LLC | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.