EPA Air · by state
Air-emissions sources in Maryland
- 9,831Facilities
By emissions classification in Maryland
High-priority violations in Maryland
20 sources in Maryland carry a current high-priority Clean Air Act violation.
Counties in Maryland
- Allegany County 126
- Anne Arundel County 672
- Baltimore County 1,116
- Baltimore (city) County 1,788
- Calvert County 70
- Caroline County 44
- Carroll County 224
- Cecil County 142
- Charles County 134
- Dorchester County 85
- Frederick County 383
- Garrett County 79
- Harford County 317
- Howard County 234
- Kent County 47
- Montgomery County 1,332
- Prince George's County 1,450
- Queen Anne's County 45
- Somerset County 58
- St. Mary's County 43
- Talbot County 61
- Undetermined County 891
- Washington County 271
- Wicomico County 150
- Worcester County 69
Industries in Maryland
Sources are grouped by the first industry code on the facility record.
- Gasoline stations (NAICS 4471) 1,672
- Educational services (NAICS 6111) 1,375
- Real estate (NAICS 5311) 1,093
- Repair and maintenance (NAICS 8111) 850
- Religious, grantmaking and similar organizations (NAICS 8131) 385
- Personal and laundry services (NAICS 8123) 382
- Printing and related support (NAICS 3231) 262
- Nonmetallic mineral product manufacturing (NAICS 3273) 148
- Justice, public order and safety (NAICS 9221) 141
- Motor vehicle and parts dealers (NAICS 4411) 126
- Food services and drinking places (NAICS 7222) 114
- Waste management and remediation (NAICS 5622) 97
- Amusement, gambling and recreation (NAICS 7139) 97
- Food manufacturing (NAICS 3111) 89
- Petroleum and coal products manufacturing (NAICS 3241) 78
- National security and international affairs (NAICS 9281) 74
- Mining and quarrying (NAICS 2123) 74
- Hospitals (NAICS 6221) 71
- Furniture and related product manufacturing (NAICS 3371) 67
- Personal and laundry services (NAICS 8122) 62
- Educational services (NAICS 6113) 59
- Utilities (NAICS 2213) 57
- Accommodation (NAICS 7211) 53
- Nursing and residential care facilities (NAICS 6233) 53
- Warehousing and storage (NAICS 4931) 52
- Merchant wholesalers, nondurable goods (NAICS 4247) 52
- Utilities (NAICS 2211) 46
- Nursing and residential care facilities (NAICS 6231) 46
- Executive and legislative government (NAICS 9211) 46
- NAICS 4911 42
- Fabricated metal product manufacturing (NAICS 3323) 40
- Food manufacturing (NAICS 3119) 39
- Telecommunications (NAICS 5171) 38
- Food manufacturing (NAICS 3117) 35
- Rental and leasing services (NAICS 5321) 35
- Fabricated metal product manufacturing (NAICS 3328) 34
- Chemical manufacturing (NAICS 3254) 34
- Plastics and rubber products manufacturing (NAICS 3261) 34
- NAICS 4529 34
- Administration of economic programs (NAICS 9261) 34
- Professional, scientific and technical services (NAICS 5417) 34
- Food manufacturing (NAICS 3114) 33
- Administration of human resource programs (NAICS 9231) 33
- Repair and maintenance (NAICS 8114) 32
- Miscellaneous manufacturing (NAICS 3399) 31
- Other information services (NAICS 5191) 30
- Specialty trade contractors (NAICS 2389) 30
- Computer and electronic product manufacturing (NAICS 3344) 29
- Paper manufacturing (NAICS 3222) 29
- Waste management and remediation (NAICS 5629) 29
- Credit intermediation (NAICS 5221) 26
- Chemical manufacturing (NAICS 3255) 26
- Heavy and civil engineering construction (NAICS 2373) 26
- Machinery manufacturing (NAICS 3339) 25
- Beverage and tobacco manufacturing (NAICS 3121) 25
- Administration of environmental programs (NAICS 9241) 23
- NAICS 4531 22
- Food manufacturing (NAICS 3116) 20
- Food and beverage retailers (NAICS 4451) 20
- Religious, grantmaking and similar organizations (NAICS 8134) 20
- Publishing industries (NAICS 5111) 19
- Wood product manufacturing (NAICS 3211) 19
- Nonmetallic mineral product manufacturing (NAICS 3279) 19
- Plastics and rubber products manufacturing (NAICS 3262) 17
- Chemical manufacturing (NAICS 3251) 17
- Computer and electronic product manufacturing (NAICS 3345) 16
- Furniture and related product manufacturing (NAICS 3372) 16
- Merchant wholesalers, durable goods (NAICS 4239) 16
- Motion picture and sound recording (NAICS 5121) 15
- Fabricated metal product manufacturing (NAICS 3324) 15
- Building construction (NAICS 2362) 15
- Electrical equipment and appliance manufacturing (NAICS 3353) 15
- Apparel manufacturing (NAICS 3152) 15
- Wood product manufacturing (NAICS 3219) 15
- Chemical manufacturing (NAICS 3256) 15
- Food manufacturing (NAICS 3115) 15
- Religious, grantmaking and similar organizations (NAICS 8139) 14
- Repair and maintenance (NAICS 8113) 14
- Professional, scientific and technical services (NAICS 5413) 14
- Transportation equipment manufacturing (NAICS 3363) 14
- Educational services (NAICS 6116) 14
- Social assistance (NAICS 6241) 13
- Pipeline transportation (NAICS 4862) 13
- Transit and ground passenger transportation (NAICS 4851) 13
- Educational services (NAICS 6115) 13
- Specialty trade contractors (NAICS 2382) 13
- NAICS 4521 13
- Social assistance (NAICS 6242) 13
- Textile mills (NAICS 3132) 12
- Couriers and messengers (NAICS 4921) 12
- Hospitals (NAICS 6222) 12
- Support activities for transportation (NAICS 4881) 12
- Administrative and support services (NAICS 5614) 12
- Building material and garden supply stores (NAICS 4441) 12
- Chemical manufacturing (NAICS 3259) 12
- Chemical manufacturing (NAICS 3252) 11
- Utilities (NAICS 2212) 11
- Telecommunications (NAICS 5172) 11
- Chemical manufacturing (NAICS 3253) 11
- Mining and quarrying (NAICS 2121) 11
- Computer and electronic product manufacturing (NAICS 3342) 11
- Food manufacturing (NAICS 3118) 10
- Professional, scientific and technical services (NAICS 5419) 10
- Data processing and hosting (NAICS 5182) 10
- Crop production (NAICS 1114) 10
- Waste management and remediation (NAICS 5621) 10
- Machinery manufacturing (NAICS 3332) 10
- NAICS 4543 10
- Animal production (NAICS 1123) 10
- Fabricated metal product manufacturing (NAICS 3329) 10
- Miscellaneous manufacturing (NAICS 3391) 10
- Primary metal manufacturing (NAICS 3313) 9
- Telecommunications (NAICS 5174) 9
- Specialty trade contractors (NAICS 2381) 9
- Food services and drinking places (NAICS 7223) 9
- Nonmetallic mineral product manufacturing (NAICS 3271) 9
- Food services and drinking places (NAICS 7221) 9
- Merchant wholesalers, nondurable goods (NAICS 4244) 9
- Personal and laundry services (NAICS 8129) 8
- Transit and ground passenger transportation (NAICS 4853) 8
- Merchant wholesalers, durable goods (NAICS 4231) 8
- Educational services (NAICS 6112) 8
- Transit and ground passenger transportation (NAICS 4854) 8
- Support activities for transportation (NAICS 4884) 8
- Machinery manufacturing (NAICS 3335) 8
- Pipeline transportation (NAICS 4869) 7
- Transportation equipment manufacturing (NAICS 3366) 7
- Ambulatory health care services (NAICS 6211) 7
- Rental and leasing services (NAICS 5324) 7
- Primary metal manufacturing (NAICS 3312) 7
- Machinery manufacturing (NAICS 3333) 7
- Merchant wholesalers, durable goods (NAICS 4233) 6
- Merchant wholesalers, nondurable goods (NAICS 4248) 6
- Performing arts and spectator sports (NAICS 7112) 6
- Merchant wholesalers, durable goods (NAICS 4238) 6
- Primary metal manufacturing (NAICS 3315) 6
- Food services and drinking places (NAICS 7224) 6
- Truck transportation (NAICS 4842) 6
- Nonmetallic mineral product manufacturing (NAICS 3272) 6
- Rail transportation (NAICS 4821) 6
- Fabricated metal product manufacturing (NAICS 3326) 6
- Administrative and support services (NAICS 5617) 6
- Machinery manufacturing (NAICS 3334) 6
- Hospitals (NAICS 6223) 6
- Ambulatory health care services (NAICS 6215) 5
- Electrical equipment and appliance manufacturing (NAICS 3359) 5
- Primary metal manufacturing (NAICS 3314) 5
- Insurance carriers and related activities (NAICS 5242) 5
- Computer and electronic product manufacturing (NAICS 3341) 5
- NAICS 4421 5
- Support activities for transportation (NAICS 4883) 5
- Nonmetallic mineral product manufacturing (NAICS 3274) 5
- Support activities for transportation (NAICS 4889) 5
- Professional, scientific and technical services (NAICS 5418) 5
- Transit and ground passenger transportation (NAICS 4855) 5
- Insurance carriers and related activities (NAICS 5241) 5
- Museums and historical sites (NAICS 7121) 5
- Leather and allied product manufacturing (NAICS 3162) 5
- Ambulatory health care services (NAICS 6214) 5
- Textile mills (NAICS 3133) 4
- Repair and maintenance (NAICS 8112) 4
- Merchant wholesalers, nondurable goods (NAICS 4246) 4
- Motor vehicle and parts dealers (NAICS 4412) 4
- Merchant wholesalers, durable goods (NAICS 4237) 4
- Performing arts and spectator sports (NAICS 7111) 4
- Transportation equipment manufacturing (NAICS 3364) 4
- Specialty trade contractors (NAICS 2383) 4
- Broadcasting (NAICS 5151) 4
- Rental and leasing services (NAICS 5322) 4
- Machinery manufacturing (NAICS 3331) 4
- Agriculture and forestry support (NAICS 1151) 4
- Merchant wholesalers, durable goods (NAICS 4235) 3
- NAICS 4511 3
- Real estate (NAICS 5312) 3
- Ambulatory health care services (NAICS 6213) 3
- Amusement, gambling and recreation (NAICS 7131) 3
- Transit and ground passenger transportation (NAICS 4852) 3
- NAICS 5133 3
- Real estate (NAICS 5313) 3
- Mining support (NAICS 2131) 3
- Food manufacturing (NAICS 3113) 3
- Merchant wholesalers, durable goods (NAICS 4232) 3
- Religious, grantmaking and similar organizations (NAICS 8133) 3
- NAICS 4431 3
- Clothing and accessories stores (NAICS 4481) 3
- Transportation equipment manufacturing (NAICS 3362) 3
Air-emissions inspections in Maryland, by year
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source.
High-priority air violations in Maryland, 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.
Air-emissions stack tests in Maryland, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| ROYAL AIRCRAFT SERVICES LLC | Minor source | No |
| ROYAL AUTO BODY | Minor source | No |
| ROYAL AUTO SERVICE | Minor source | No |
| ROYAL CAB - PROGRESS. & EXEC. ASSOC | Minor source | No |
| ROYAL FARM | Minor source | No |
| ROYAL FARM 149 | Minor source | No |
| ROYAL FARM GAS STATION | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE | Minor source | No |
| ROYAL FARM STORE #170 GAS | Minor source | No |
| ROYAL FARM STORE 148 | Minor source | No |
| ROYAL FARMS | Minor source | No |
| ROYAL FARMS | Minor source | No |
| ROYAL FARMS | Minor source | No |
| ROYAL FARMS | Minor source | No |
| ROYAL FARMS | Minor source | No |
| ROYAL FARMS | Minor source | No |
| ROYAL FARMS #128 | Minor source | No |
| ROYAL FARMS #136 | Minor source | No |
| ROYAL FARMS #138 | Minor source | No |
| ROYAL FARMS #150 | Minor source | No |
| ROYAL FARMS #153 | Minor source | No |
| ROYAL FARMS #159 | Minor source | No |
| ROYAL FARMS #16 | Minor source | No |
| ROYAL FARMS #174 | Minor source | No |
| ROYAL FARMS #188 | Minor source | No |
| ROYAL FARMS #23 | Minor source | No |
| ROYAL FARMS #40 | Minor source | No |
| ROYAL FARMS GAS STATION | Minor source | No |
| ROYAL FARMS GAS STATION | Minor source | No |
| ROYAL FARMS GAS STATION | Minor source | No |
| ROYAL FARMS GAS STATION | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE | Minor source | No |
| ROYAL FARMS STORE # 101 | Minor source | No |
| ROYAL FARMS STORE #163 | Minor source | No |
| ROYAL FARMS STORE #169 | Minor source | No |
| ROYAL FARMS STORE #181 | Minor source | No |
| ROYAL FARMS STORE #183 | Minor source | No |
| ROYAL FURNITURE | Minor source | No |
| ROYAL PACKING | Minor source | No |
| ROYAL QUALITY FOODS | Minor source | No |
| ROYAL QUALITY FOODS | Minor source | No |
| ROYE-WILLIAMS ELEMENTARY SCHOOL | Minor source | No |
| RPG DIFFUSER SYSTEMS | Minor source | No |
| RPM COLLISION & SERVICE | Minor source | No |
| RR DONNELLEY COMPANY | Minor source | No |
| RT. 135 FUEL STOP | Minor source | No |
| RUARK & ASHTON | Minor source | No |
| RUARK, W.T., INC. | Minor source | No |
| RUBBER MILLERS | Minor source | No |
| RUBBERSET COMPANY | Minor source | No |
| RUCK FUNERAL HOME | Minor source | No |
| RUCK, LEONARD J INC. | Minor source | No |
| RUCKER, GEORGE H. COMPANY | Minor source | No |
| RUDY, RICHARD B., INC. | Minor source | No |
| RUGBY AVENUE, 4827 | Minor source | No |
| RUGBY AVENUE, 4833 | Minor source | No |
| RUHL ARMORY | Minor source | No |
| RUHRAH, JOHN ELEMENTARY - ES 228/230 | Minor source | No |
| RUKERT TERMINALS | Minor source | No |
| RUMMEL, KLEPPER & KAHL | Minor source | No |
| RUNKLES SIGN SERVICE | Minor source | No |
| RUNYON, JOHN MIDDLE SCHOOL | Minor source | No |
| RUPERT LANDSCAPING | Minor source | No |
Figures from EPA’s ICIS-AIR download.