EPA Air · by state
Air-emissions sources in Pennsylvania
- 8,754Facilities
By emissions classification in Pennsylvania
High-priority violations in Pennsylvania
370 sources in Pennsylvania carry a current high-priority Clean Air Act violation.
Counties in Pennsylvania
- Adams County 63
- Allegheny County 1,374
- Armstrong County 79
- Beaver County 95
- Bedford County 37
- Berks County 216
- Blair County 105
- Bradford County 138
- Bucks County 417
- Butler County 187
- Cambria County 106
- Cameron County 15
- Carbon County 30
- Centre County 84
- Chester County 235
- Clarion County 41
- Clearfield County 99
- Clinton County 46
- Columbia County 56
- Crawford County 61
- Cumberland County 145
- Dauphin County 155
- Delaware County 253
- Elk County 61
- Erie County 137
- Fayette County 73
- Forest County 21
- Franklin County 94
- Fulton County 12
- Greene County 131
- Huntingdon County 21
- Indiana County 103
- Jefferson County 64
- Juniata County 15
- Lackawanna County 118
- Lancaster County 251
- Lawrence County 85
- Lebanon County 94
- Lehigh County 149
- Luzerne County 217
- Lycoming County 168
- McKean County 70
- Mercer County 108
- Mifflin County 21
- Monroe County 45
- Montgomery County 474
- Montour County 17
- Northampton County 154
- Northumberland County 107
- Perry County 22
- Philadelphia County 461
- Pike County 13
- Potter County 35
- Schuylkill County 99
- Snyder County 47
- Somerset County 63
- Sullivan County 12
- Susquehanna County 206
- Tioga County 75
- Undetermined County 91
- Union County 38
- Venango County 45
- Warren County 46
- Washington County 223
- Wayne County 27
- Westmoreland County 158
- Wyoming County 47
- York County 199
Industries in Pennsylvania
Sources are grouped by the first industry code on the facility record.
- Repair and maintenance (NAICS 8111) 1,008
- Personal and laundry services (NAICS 8123) 957
- Oil and gas extraction (NAICS 2111) 821
- Motor vehicle and parts dealers (NAICS 4411) 375
- Educational services (NAICS 6111) 338
- Gasoline stations (NAICS 4471) 328
- Mining and quarrying (NAICS 2123) 284
- Personal and laundry services (NAICS 8122) 259
- Mining support (NAICS 2131) 225
- Petroleum and coal products manufacturing (NAICS 3241) 159
- Hospitals (NAICS 6221) 151
- Fabricated metal product manufacturing (NAICS 3328) 122
- Pipeline transportation (NAICS 4862) 120
- Utilities (NAICS 2211) 117
- Plastics and rubber products manufacturing (NAICS 3261) 110
- Merchant wholesalers, durable goods (NAICS 4231) 102
- Fabricated metal product manufacturing (NAICS 3323) 86
- Printing and related support (NAICS 3231) 84
- Primary metal manufacturing (NAICS 3315) 81
- Wood product manufacturing (NAICS 3219) 81
- Merchant wholesalers, nondurable goods (NAICS 4247) 81
- Real estate (NAICS 5311) 78
- Paper manufacturing (NAICS 3222) 74
- Waste management and remediation (NAICS 5622) 74
- Nonmetallic mineral product manufacturing (NAICS 3273) 72
- Nonmetallic mineral product manufacturing (NAICS 3279) 61
- Furniture and related product manufacturing (NAICS 3371) 60
- Utilities (NAICS 2213) 60
- Fabricated metal product manufacturing (NAICS 3329) 58
- Chemical manufacturing (NAICS 3251) 54
- Educational services (NAICS 6113) 52
- Merchant wholesalers, durable goods (NAICS 4239) 51
- Primary metal manufacturing (NAICS 3311) 50
- Miscellaneous manufacturing (NAICS 3399) 44
- Mining and quarrying (NAICS 2121) 43
- Food manufacturing (NAICS 3111) 40
- Justice, public order and safety (NAICS 9221) 40
- Chemical manufacturing (NAICS 3259) 39
- Fabricated metal product manufacturing (NAICS 3321) 39
- Food manufacturing (NAICS 3119) 37
- Primary metal manufacturing (NAICS 3312) 36
- Religious, grantmaking and similar organizations (NAICS 8131) 35
- Machinery manufacturing (NAICS 3339) 35
- Wood product manufacturing (NAICS 3211) 35
- Nonmetallic mineral product manufacturing (NAICS 3271) 33
- Specialty trade contractors (NAICS 2389) 32
- Fabricated metal product manufacturing (NAICS 3324) 32
- Machinery manufacturing (NAICS 3335) 31
- Rental and leasing services (NAICS 5321) 31
- Pipeline transportation (NAICS 4869) 31
- Transit and ground passenger transportation (NAICS 4851) 30
- Primary metal manufacturing (NAICS 3314) 30
- Chemical manufacturing (NAICS 3255) 29
- Utilities (NAICS 2212) 29
- Transportation equipment manufacturing (NAICS 3362) 29
- Motor vehicle and parts dealers (NAICS 4413) 28
- Professional, scientific and technical services (NAICS 5419) 27
- Chemical manufacturing (NAICS 3252) 27
- Nonmetallic mineral product manufacturing (NAICS 3272) 26
- Food manufacturing (NAICS 3118) 25
- Electrical equipment and appliance manufacturing (NAICS 3359) 25
- Chemical manufacturing (NAICS 3254) 25
- Plastics and rubber products manufacturing (NAICS 3262) 24
- Fabricated metal product manufacturing (NAICS 3327) 23
- Beverage and tobacco manufacturing (NAICS 3121) 23
- Fabricated metal product manufacturing (NAICS 3326) 22
- Primary metal manufacturing (NAICS 3313) 22
- Electrical equipment and appliance manufacturing (NAICS 3353) 22
- Machinery manufacturing (NAICS 3331) 21
- Furniture and related product manufacturing (NAICS 3372) 21
- Telecommunications (NAICS 5171) 20
- Computer and electronic product manufacturing (NAICS 3344) 20
- Professional, scientific and technical services (NAICS 5417) 19
- Motor vehicle and parts dealers (NAICS 4412) 19
- Computer and electronic product manufacturing (NAICS 3345) 19
- Warehousing and storage (NAICS 4931) 19
- Food manufacturing (NAICS 3112) 18
- Truck transportation (NAICS 4841) 18
- Merchant wholesalers, nondurable goods (NAICS 4246) 17
- Professional, scientific and technical services (NAICS 5414) 17
- Publishing industries (NAICS 5111) 17
- Merchant wholesalers, durable goods (NAICS 4235) 17
- Waste management and remediation (NAICS 5629) 16
- Nursing and residential care facilities (NAICS 6231) 16
- Food manufacturing (NAICS 3114) 16
- Building construction (NAICS 2362) 15
- Merchant wholesalers, durable goods (NAICS 4238) 15
- Merchant wholesalers, durable goods (NAICS 4233) 15
- Machinery manufacturing (NAICS 3334) 15
- Data processing and hosting (NAICS 5182) 15
- Miscellaneous manufacturing (NAICS 3391) 15
- Paper manufacturing (NAICS 3221) 15
- Food manufacturing (NAICS 3113) 14
- Crop production (NAICS 1114) 14
- National security and international affairs (NAICS 9281) 13
- Professional, scientific and technical services (NAICS 5413) 13
- Food manufacturing (NAICS 3115) 13
- Merchant wholesalers, nondurable goods (NAICS 4244) 13
- Real estate (NAICS 5313) 13
- Machinery manufacturing (NAICS 3332) 13
- Food manufacturing (NAICS 3116) 13
- Textile mills (NAICS 3133) 12
- Transportation equipment manufacturing (NAICS 3363) 12
- Wood product manufacturing (NAICS 3212) 12
- Fabricated metal product manufacturing (NAICS 3322) 11
- Machinery manufacturing (NAICS 3333) 11
- Executive and legislative government (NAICS 9211) 11
- Air transportation (NAICS 4811) 11
- Nonmetallic mineral product manufacturing (NAICS 3274) 11
- Chemical manufacturing (NAICS 3256) 11
- Support activities for transportation (NAICS 4882) 10
- Support activities for transportation (NAICS 4884) 9
- Textile mills (NAICS 3132) 9
- Repair and maintenance (NAICS 8113) 9
- Specialty trade contractors (NAICS 2382) 9
- Support activities for transportation (NAICS 4883) 9
- Hospitals (NAICS 6222) 9
- Machinery manufacturing (NAICS 3336) 9
- Educational services (NAICS 6112) 8
- Hospitals (NAICS 6223) 8
- Transportation equipment manufacturing (NAICS 3364) 8
- Scenic and sightseeing transportation (NAICS 4871) 8
- Transportation equipment manufacturing (NAICS 3361) 8
- Transportation equipment manufacturing (NAICS 3365) 8
- NAICS 4521 7
- Administration of environmental programs (NAICS 9241) 7
- Building construction (NAICS 2361) 7
- Waste management and remediation (NAICS 5621) 7
- Educational services (NAICS 6115) 6
- Administrative and support services (NAICS 5617) 6
- Accommodation (NAICS 7211) 6
- Telecommunications (NAICS 5179) 5
- Electrical equipment and appliance manufacturing (NAICS 3351) 5
- Administration of housing and community development (NAICS 9251) 5
- Transportation equipment manufacturing (NAICS 3366) 5
- Administrative and support services (NAICS 5619) 5
- Computer and electronic product manufacturing (NAICS 3342) 5
- Merchant wholesalers, nondurable goods (NAICS 4249) 5
- Performing arts and spectator sports (NAICS 7112) 4
- Credit intermediation (NAICS 5223) 4
- Beverage and tobacco manufacturing (NAICS 3122) 4
- Chemical manufacturing (NAICS 3253) 4
- Transportation equipment manufacturing (NAICS 3369) 4
- Professional, scientific and technical services (NAICS 5415) 4
- Private households (NAICS 8141) 4
- Credit intermediation (NAICS 5221) 4
- Administrative and support services (NAICS 5614) 4
- Heavy and civil engineering construction (NAICS 2371) 4
- Truck transportation (NAICS 4842) 3
- Support activities for transportation (NAICS 4881) 3
- Transit and ground passenger transportation (NAICS 4859) 3
- Building material and garden supply stores (NAICS 4442) 3
- NAICS 4529 3
- Nursing and residential care facilities (NAICS 6232) 3
- Leather and allied product manufacturing (NAICS 3161) 3
- Telecommunications (NAICS 5172) 3
- Religious, grantmaking and similar organizations (NAICS 8133) 3
- Broadcasting (NAICS 5151) 3
- Securities and investments (NAICS 5239) 3
- Specialty trade contractors (NAICS 2381) 3
- Water transportation (NAICS 4832) 3
- Mining and quarrying (NAICS 2122) 3
- Nursing and residential care facilities (NAICS 6233) 3
- NAICS 4543 3
- Administration of economic programs (NAICS 9261) 3
- Management of companies (NAICS 5511) 3
- NAICS 5133 3
- Merchant wholesalers, nondurable goods (NAICS 4245) 3
- Personal and laundry services (NAICS 8129) 3
Air inspections in Pennsylvania, 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 5,287
- 2025 7,277
- 2024 7,215
- 2023 6,551
- 2022 6,724
- 2021 6,954
- 2020 6,491
- 2019 6,635
- 2018 6,336
- 2017 6,410
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| MALLET & COMPANY, INC. | Minor source | No |
| MALVERN CREMATORY/FRAZER | Minor source | No |
| MANBECK MOTORS | Minor source | No |
| MANHEIM AUTO AUCTION/MANHEIM | Minor source | No |
| MANUEL UNIT | Minor source | No |
| MAPLE COAL CO/COLVER REFUSE PLT | Minor source | No |
| MAPLE HILL CEMETERY ASSN/ARCHBALD | Minor source | Yes |
| MAPLE LAWN CLNR/PHOENIXVILLE | Minor source | No |
| MAPLE PRESS CO/YORK | Minor source | No |
| MAR-CHET'S GARAGE | Minor source | No |
| MARATHON ASHLAND PETRO FLOREFFE TERM/ASP | Minor source | No |
| MARBURGER/VICNOR GAW | Minor source | No |
| MARC'S AUTO SERVICE | Minor source | No |
| MARCHO W&M 3 | Minor source | No |
| MARCOS DRY CLNR/NEW CASTLE | Minor source | No |
| MARCUS COLE DBA COLES CONST/PECK HILL QUARRY | Minor source | No |
| MARCUS HOOK ENERGY LP/750 MW | Major source | No |
| MARI-AL AUTO BODY/COLLEGEVILLE | Minor source | No |
| MARIAN MANOR INC. | Minor source | No |
| MARIENVILLE FOUNDRY/MARIENVILLE | Minor source | No |
| MARIETTA MOTORS | Minor source | No |
| MARIOS DRY CLNR SVC/BETHLEHEM | Minor source | No |
| MARK CLNR/HBG | Minor source | No |
| MARK LINE IND OF PA /EPHRATA | Minor source | No |
| MARK'S AUTO BODY | Minor source | No |
| MARK'S EXXON | Minor source | No |
| MARKET SQUARE SERVICE STATION | Minor source | No |
| MARKETPLACE CLNR/HUNTINGDON VALLEY | Minor source | No |
| MARKO COATING LLC/BRISTOL | Minor source | No |
| MARKS AUTO REPAIR/PGH | Minor source | No |
| MARKWEST LIBERTY BLUESTONE LLC/BLUESTONE GAS PROC PLT | Major source | No |
| MARKWEST LIBERTY BLUESTONE LLC/ROYAL OAK COMP STA | Minor source | No |
| MARKWEST LIBERTY BLUESTONE LLC/SARSEN GAS PROC PLT | Minor source | No |
| MARKWEST LIBERTY BLUESTONE LLC/TRILLITH COMP STA | Minor source | No |
| MARKWEST LIBERTY BLUESTONE LLC/VOLL COMP STA | Minor source | No |
| MARKWEST LIBERTY M&R/TUPTA DAY COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MID & RES / HOSKINS BOOSTER COMP STA | Minor source | No |
| MARKWEST LIBERTY MIDST & RES/IMPERIAL CIBUS RANCH COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MIDST & RESOURCES/THREE BROTHERS COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES LLC/JOE CAIN L/R SITE | Minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES LLC/POST RD L/R SITE | Minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES LLC/SMITH T L/R SITE | Minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES LLC/WILHELM L/R SITE | Minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES/FULTON BOOSTER STA | Synthetic minor source | Yes |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES/GODWIN COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES/HARMON CREEK GAS PLT | Minor source | Yes |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES/HOUSTON GAS PLT | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES/HUNTINGTON FARMS L/R | Minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES/JOHNSTON COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES/LOWRY COMP STA | Minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES/MCMICHAEL COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES/REDD COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM & RESOURCES/SHAW COMP STA | Minor source | No |
| MARKWEST LIBERTY MIDSTREAM RES/DOWN HOME COMPRESSOR STATION | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM/ CARPENTER COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM/BAKER COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM/BRIGICH COMP STA | Minor source | No |
| MARKWEST LIBERTY MIDSTREAM/DRYER BOOSTER COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM/SMITH COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM/TIMBERLAKE COMP STA | Synthetic minor source | No |
| MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA | Synthetic minor source | No |
| MARRARAS CLNR/E COLLEGE AVE PLT | Minor source | No |
| MARS FISHCARE NORTHAMERICA/CHALFONT | Minor source | No |
| MARS WRIGLEY US LLC/ELIZABETHTOWN | Major source | No |
| MARSH ASPHALT, INC. - DRAVOSBURG PLANT | Minor source | No |
| MARSHALLS GULF | Minor source | No |
| MARSHALLS NE DISTRIBUTION CENTER | No | |
| MARTIN CHEVROLET, INC | Minor source | No |
| MARTIN LUTHER KING HIGH SCHOOL | Yes | |
| MARTIN MARIETTA MAGNESIA SPECIALITIES IN | Minor source | No |
| MARTIN METAL SPECIALTIES | Minor source | No |
| MARTIN STONE QUARRIES/COLEBROOKDALE | Minor source | No |
| MARTIN STONE QUARRIES/WASHINGTON | Minor source | No |
| MARTIN'S AUTO CENTER | Minor source | No |
| MARTIN'S AUTO SERVICE | Minor source | No |
| MARTIN'S GARAGE | Minor source | No |
| MARTINIZING DRY CLEANING | Minor source | No |
| MARTINS CLEANERS | Minor source | No |
| MARTINS CREEK GRAIN ELEVATOR | Synthetic minor source | No |
| MARTINS DRY CLNR SVC/GREENSBURG | Minor source | No |
| MARTINS ELECTRIC PLANT | Minor source | No |
| MARTINS FAMOUS PASTRY SHOPPE/CHAMBERSBURG | Synthetic minor source | No |
| MARTINS FORESTRY PRODUCTS LLC/MYERSTOWN | Synthetic minor source | No |
| MARTINS POTATO CHIPS/THOMASVILLE | Minor source | No |
| MARTY'S GARAGE | Minor source | No |
| MARTZ TRAILWAYS | Minor source | No |
| MARWAS STEEL CO/LAUREL STEEL DIV | Minor source | No |
| MARZANI'S CLEANERS | Minor source | No |
| MASONIC VILLAGES/ELIZABETHTOWN | Minor source | No |
| MASSARO CORPORATION/PGH | Minor source | No |
| MASSELLES AUTO BODY INC/LANGHORNE | Minor source | No |
| MASTER MECHANICS | Minor source | No |
| MASTER TECH AUTO SERVICE | Minor source | No |
| MASTER WOODCRAFT/WASHINGTON PLT | Minor source | No |
| MASTERS CLNR/JOHNSTOWN | Minor source | No |
| MASTERS ONE HOUR CLEANERS | Minor source | No |
| MATERIALS PROCESSING CORPORATION | Minor source | No |
| MATERION BRUSH INC/SHOEMAKERSVILLE | Minor source | No |
| MATHESON TRI GAS INC/CLEARFIELD CO2 PLT | Minor source | No |
Figures from EPA’s ICIS-AIR download.