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 |
|---|---|---|
| MT AUBURN HOSPITAL | Synthetic minor source | No |
| MVP REALTY CO | Minor source | No |
| MWRA ARLINGTON #1 PUMP STATION | Synthetic minor source | No |
| MWRA ARLINGTON #2 PUMP STATION | Minor source | No |
| MWRA CARROLL WATER TREATMENT PLANT | Synthetic minor source | No |
| MWRA COTTAGE FARMS | Minor source | No |
| MWRA GILLIS PUMP STA | Synthetic minor source | No |
| MWRA HAYES PUMP STATION | Minor source | No |
| MWRA NEWTON PUMP STATION | Minor source | No |
| MWRA NORUMBEGA RESER | Minor source | No |
| MWRA PRISON POINT PU | Minor source | No |
| MWRA WESTON RESERVOI | Minor source | No |
| MYSTIC PLACE | Minor source | No |
| MYSTIC STATION | Major source | No |
| MYSTIC VALLEY FOUNDRY | Minor source | No |
| NAGOG PARK | Minor source | No |
| NAI CRANES | Minor source | No |
| NARDONE ELECTRICAL CORP | No | |
| NASHOBA VALLEY SKI AREA | No | |
| NASHOBA VALLEY TECH HS | Minor source | No |
| NASOYA FOODS USA LLC | Synthetic minor source | Yes |
| NATGUN | No | |
| NATICK HIGH SCHOOL | Synthetic minor source | No |
| NATIONAL GRID USA SERVICE COMPANY INC | Synthetic minor source | No |
| NE HYDRO TRANSMISSION ELECTRIC | Minor source | No |
| NEOPRINT | Minor source | No |
| NETWORK DRIVE OWNER LLC | Synthetic minor source | No |
| NEVLEN COMPANY INCORPORATED | Minor source | No |
| NEW ENGLAND BUSINESS SERVICE | Minor source | No |
| NEW ENGLAND EMULSIONS CORP | Minor source | No |
| NEW ENGLAND PLASTICS | Minor source | No |
| NEW ENGLAND PRECISION GRINDING | Minor source | No |
| NEW PENN MOTOR EXPRESS | No | |
| NEWLY WEDS FOODS | Synthetic minor source | No |
| NEWPORT AGGREGATES | No | |
| NEWPORT MATERIALS LLC | No | |
| NEWTON CEMETERY CORPORATION | Synthetic minor source | No |
| NEWTON NORTH HIGH SCHOOL | Minor source | No |
| NEWTON WELLESLEY HOSPITAL | Synthetic minor source | No |
| NEWTOWNE COURT APARTMENTS | Minor source | No |
| NIP OWNER LLC | Synthetic minor source | No |
| NORTH MIDDLESEX REGIONAL HIGH | Minor source | No |
| NORTH READING AUTO | Minor source | Yes |
| NORTH READING AUTO REPAIR | Minor source | No |
| NORTH READING TRANSPORTATION | Minor source | No |
| NORTH READING TRANSPORTATION | Minor source | No |
| NORTH READING TRANSPORTATION | Minor source | No |
| NORTH READING TRANSPORTATION | Minor source | No |
| NORTH READING TRANSPORTATION | Minor source | No |
| NORTH STREET SCHOOL | Minor source | No |
| NORTHEAST METROPOLITAN REGIONAL VOC | Synthetic minor source | No |
| NORTHERN RESEARCH & ENGINEERING | Minor source | No |
| NOVA BIOMEDICAL | Minor source | No |
| NOVARTIS INSTITUTE FOR BIOMEDICAL RESEAR | Synthetic minor source | No |
| NOVARTIS INSTITUTE FOR BIOMEDICAL RESEARCH | Synthetic minor source | No |
| NP DRY CLEANERS | Minor source | No |
| NTH CYCLE | No | |
| NTS ACTON | Minor source | No |
| NU WAY CLEANERS INC | Minor source | No |
| NUCAR HONDA OF WESTFORD | No | |
| NYACOL PRODUCTS INCORPORATED | Minor source | Yes |
| NYPRO DEVENS | Synthetic minor source | No |
| OAKMONT REGIONAL HIGH SCHOOL | Minor source | No |
| OCULAR THERAPEUTIX | Minor source | No |
| OLD MOTHER HUBBARD | Minor source | No |
| OLIGO FACTORY | Minor source | No |
| OPT INDUSTRIES | No | |
| OPTRON SYSTEMS INCORPORATED | Minor source | No |
| ORCHARD COVE INC | Minor source | No |
| ORCHID CLEANER | Minor source | No |
| ORGANOGENESIS INC | Synthetic minor source | No |
| PACE INDUSTRIES CAMBRIDGE DIVISION | Minor source | No |
| PACELLA CONCRETE RYC | Minor source | No |
| PACTIV LLC | Minor source | No |
| PALMER MANUFACTURING | Minor source | No |
| PARKER HANNIFIN | Synthetic minor source | No |
| PARKER JUNIOR HIGH SCHOOL | Minor source | No |
| PARTNERS HEALTHCARE - BRIGHAMS | Minor source | Yes |
| PATRIOT BEVERAGES FKA VERYFINE PRODUCTS INC | Synthetic minor source | Yes |
| PATRIOT COATINGS INC | Synthetic minor source | No |
| PEARSON CHEMISTRY | Minor source | No |
| PEPPERHORN LLC | Minor source | No |
| PERFECT PRESS DRY CLEANERS INC | Minor source | No |
| PERINI CORPORATION | Minor source | No |
| PERKINELMER INC. | No | |
| PERKINS SCHOOL | Minor source | No |
| PFIZER GLOBAL RESEARCH & DEVELOPMENT | Minor source | No |
| PHOENIX TAILINGS | Minor source | No |
| PIANTEDOSI BAKING CO | Synthetic minor source | No |
| PIANTEDOSI BAKING COMPANY INC | Minor source | No |
| PIEDMONT OPERATING PARTNERSHIP LP | Synthetic minor source | No |
| PINE & BAKER | Minor source | No |
| PIONEER MANAGEMENT COMPANY | Minor source | No |
| PJ KEATING COMPANY | Synthetic minor source | No |
| PLANT ACTION INCORPORATED | Minor source | No |
| PLATING FOR ELECRONICS | Minor source | No |
| PLUG POWER ELECTROLYZERS | Yes | |
| POLAROID CORPORATION | Minor source | No |
| POLY6 TECHNOLOGIES | No | |
| POLYJOULE INC. | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.