EPA Air · by county
Air-emissions sources in Norfolk County, Massachusetts
- 365Facilities
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Every stationary source in Norfolk 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.
Every source’s record in Norfolk County
Each of the 309 operating major, synthetic minor and minor sources in Norfolk County, Massachusetts has a record page: every source in Norfolk County, A to Z.
By emissions classification in Norfolk 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 Norfolk 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 48
- 2025 inspections 98
- 2024 inspections 92
- 2023 inspections 57
- 2022 inspections 73
- 2021 inspections 54
- 2020 inspections 65
- 2019 inspections 97
- 2018 inspections 93
- 2017 inspections 77
Violations in Norfolk County, by year
A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity.
- 2025 violations 4
- 2023 violations 4
- 2022 violations 4
- 2019 violations 3
- 2018 violations 5
- 2017 violations 3
Stack tests in Norfolk County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 4
- 2025 stack tests 7
- 2024 stack tests 4
- 2019 stack tests 9
- 2018 stack tests 3
- 2017 stack tests 5
Inspections in Norfolk County, year by year · Violations in Norfolk County, year by year · Stack tests in Norfolk County, year by year
Other counties in Massachusetts
Every county in the state with at least three sources on file.
- Barnstable County 95
- Berkshire County 104
- Bristol County 484
- Dukes County 7
- Essex County 376
- Franklin County 66
- Hampden County 432
- Hampshire County 93
- Middlesex County 932
- Nantucket County 9
- Plymouth County 256
- Suffolk County 412
- Undetermined County 7
- Worcester County 696
Facilities
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register for Norfolk county, MA. It lists 365 facilities in Norfolk county, of which 11 are major sources.