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 |
|---|---|---|
| WASTE MANAGEMENT OF MA | Minor source | No |
| WASTE MANAGEMENT OF WOBURN | Minor source | No |
| WASTE MGMT INC | Minor source | No |
| WATERS LITHOGRAPHIC | Minor source | No |
| WATERSTONE WAKEFIELD LLC | Synthetic minor source | No |
| WAVE LIFE SCIENCES | No | |
| WESTFORD ACADEMY HIGH SCHOOL | Minor source | No |
| WESTFORD ANODIZING CORPORATION | Minor source | No |
| WESTFORD STREET LANDFILL-LOWELL | Minor source | No |
| WESTIN HOTEL | Minor source | No |
| WESTON HIGH SCHOOL | Minor source | No |
| WESTROCK - SOUTHERN CONTAINER LLC | Minor source | No |
| WESTROCK CP LLC | Synthetic minor source | No |
| WF WOOD INC | Minor source | No |
| WHIDDEN MEMORIAL HOSPITAL | Synthetic minor source | No |
| WHITEHEAD INSTITUTE | Minor source | No |
| WHITEHEAD INSTITUTE | Minor source | No |
| WHITEHEAD INSTITUTE FOR BIOMEDICAL RESEARCH | Minor source | Yes |
| WIE SIC MACHINE, INC. | Minor source | No |
| WINCHESTER HIGH SCHOOL | Minor source | No |
| WINCHESTER HOSPITAL | Synthetic minor source | No |
| WINFIELD BROOKS CO | Synthetic minor source | No |
| WJ GRAVES CONSTRUCTION CO | Minor source | No |
| WOBURN HIGH SCHOOL | Minor source | No |
| WOBURN SANITARY LANDFILL | Synthetic minor source | No |
| WOODLAWN CEMETARY | Minor source | No |
| WYETH RESEARCH | Minor source | No |
| WYETH RESEARCH | Minor source | No |
| WYNN MIDDLE SCHOOL | Minor source | No |
| XTALIC CORPORATION | No | |
| XYLECO INC | No | |
| ZYGOTERAOPTIX | Minor source | No |
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County as filed on the facility record. Figures from EPA’s ICIS-AIR download.