EPA Air · by county
Air-emissions sources in Montgomery County, Maryland
- 1,332Facilities
Every stationary source in Montgomery County, Maryland 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 Montgomery 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 Montgomery 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 12
- 2025 — inspections 15
- 2024 — inspections 47
- 2023 — inspections 45
- 2022 — inspections 41
- 2021 — inspections 31
- 2020 — inspections 31
- 2019 — inspections 34
- 2018 — inspections 49
- 2017 — inspections 66
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| MANCHESTER ROAD, 9004 | Minor source | No |
| MANCHESTER ROAD, 9119 | Minor source | No |
| MANOR ROAD, 3720 | Minor source | No |
| MANOR ROAD, 3782 | Minor source | No |
| MANOR SUPER CLEANERS | Minor source | No |
| MAPLE AVENUE, 7520 | Minor source | No |
| MAPLE AVENUE, 7610 | Minor source | No |
| MAPLE AVENUE, 7611 | Minor source | No |
| MAPLE AVENUE, 7620 | Minor source | No |
| MAPLE AVENUE, 7667 | Minor source | No |
| MAPLE AVENUE, 7710 | Minor source | No |
| MAPLE AVENUE, 7777 | Minor source | No |
| MARIAN FATHERS NOVITIATE | Minor source | No |
| MARK MOTOR COMPANY | Minor source | No |
| MARK TWAIN SPECIAL SCHOOL | Minor source | No |
| MARRIOTT CORPORATION | Minor source | No |
| MARRIOTT GAITHERSBURG HOTEL | Minor source | No |
| MARVIN MEMORIAL UNITED METH. CHURCH | Minor source | No |
| MARYLAND NATIONAL CENTER | Minor source | No |
| MASTER CRAFTERS AUTO REBUILDING | Minor source | No |
| MAUS WARFIELD USAR | Minor source | No |
| MAYORGA IMPORTS | Minor source | No |
| MCCALL MILLWORK | Minor source | No |
| MCCORMICK PAINT WORKS COMPANY | Minor source | No |
| MCPS - BETHESDA DEPOT | Minor source | No |
| MCPS - CLARKSBURG DEPOT | Minor source | No |
| MCPS - LINCOLN CENTER OFFICE | Minor source | No |
| MCPS - RANDOLPH DEPOT | Minor source | No |
| MCPS - SHADY GROVE DEPOT | Minor source | No |
| MD. NAT'L CAPITAL PARK & PLANNING. | Minor source | No |
| MD. NAT'L CAPITAL PK. & PLAN. COMM. | Minor source | No |
| MD. NAT'L CAPITAL PK. & PLAN. COMM. | Minor source | No |
| MD. NAT'L CAPITAL PK. & PLAN. COMM. | Minor source | No |
| MD. NAT'L CAPITAL PK. & PLAN. COMM. | Minor source | No |
| MD. NAT'L CAPITOL PK. & PLAN. COMM. | Minor source | No |
| MEADOW HALL ELEMENTARY SCHOOL | Minor source | No |
| MEADOWBROOK MAINT. YARD, MNCP&PC | Minor source | No |
| MEDIMMUNE | Minor source | No |
| MEDIMMUNE, INC. | Synthetic minor source | No |
| MELLOTT, H.B. - PEPCO RD (TEMPORARY) | Minor source | No |
| MEMORIAL UNITED METHODIST CHURCH | Minor source | No |
| MERIT ASSOCIATES | Minor source | No |
| MERIT CONCRETE CORP | Minor source | No |
| METRO FED. SAVINGS & LOAN | Minor source | No |
| METRO PLATING & POLISHING | Minor source | No |
| MID-ATLANTIC CORPORATION | Minor source | No |
| MILAE CLEANERS | Minor source | No |
| MILL CREEK TOWNE ELEMENTARY SCHOOL | Minor source | No |
| MILLS CHOICE ROAD, 19024 | Minor source | No |
| MINKOFF DEVELOPMENT | Minor source | No |
| MODERN BODY SHOP | Minor source | No |
| MODERN MADE CABINETRY | Minor source | No |
| MODIFICATIONS UNLIMITED | Minor source | No |
| MONOCACY ELEMENTARY SCHOOL | Minor source | No |
| MONROE STREET, 118 | Minor source | No |
| MONROE STREET, 90 | Minor source | No |
| MONT. CO. AIRPARK-QUEENAIR STATION | Minor source | No |
| MONT. CO. GOV. | Minor source | No |
| MONT. CO. GOV. 11701 NEW HAMP. AVE. | Minor source | No |
| MONT. CO. GOV. 1283 SEVEN LOCKS ROAD | Minor source | No |
| MONT. CO. GOV. 1301 SEVEN LOCKS ROAD | Minor source | No |
| MONT. CO. GOV. 1307 SEVEN LOCKS ROAD | Minor source | No |
| MONT. CO. GOV. 1451 SEVEN LOCKS ROAD | Minor source | No |
| MONT. CO. GOV. 27 COURTHOUSE SQUARE | Minor source | No |
| MONT. CO. GOV. 4201 KNOWLES AVENUE | Minor source | No |
| MONT. CO. GOV. 4407 ASPEN HILL ROAD | Minor source | No |
| MONT. CO. GOV. 6400 DEMOCRACY BLVD | Minor source | No |
| MONT. CO. GOV. 7359 WISCONSIN AVENUE | Minor source | No |
| MONT. CO. GOV. 8005 CONNECTICUT AVE | Minor source | No |
| MONT. CO. GOV. 801 SLIGO AVENUE | Minor source | No |
| MONT. CO. GOV. 8500 COLESVILLE ROAD | Minor source | No |
| MONT. CO. GOV. 8901 COLESVILLE ROAD | Minor source | No |
| MONT. CO. GOVT, 12210 BUSHEY DRIVE | Minor source | No |
| MONT.CO. GOVT. 2000 DENNIS AVENUE | Minor source | No |
| MONT.CO.-HIGHWAY MAINTEN.-COLESVILLE | Minor source | No |
| MONT.CO.GOVT.-14015 N.H. AVENUE | Minor source | No |
| MONTG. CO. CENTER FOR HANDICAPPED | Minor source | No |
| MONTG. CO. GOV'T. - AIRCRAFT DRIVE | Minor source | No |
| MONTG. CO. GOV'T.-JERUSALEM ROAD | Minor source | No |
| MONTG. CO. GOV'T.-RIDGE ROAD | Minor source | No |
| MONTG. CO. PUBLIC SCH. WAREHOUSE | Minor source | No |
| MONTGOMERY AVENUE, 4641 | Minor source | No |
| MONTGOMERY BLAIR HIGH SCHOOL | Minor source | No |
| MONTGOMERY CO. GOV. 225 E. DEER PAR | Minor source | No |
| MONTGOMERY CO. GOV. 3710 BROOKEVILL | Minor source | No |
| MONTGOMERY CO. GOV. 811 RANDOLPH RD | Minor source | No |
| MONTGOMERY CO. GOV. CRABB BR. WAY | Minor source | No |
| MONTGOMERY COLLEGE - TAKOMA PARK | Minor source | No |
| MONTGOMERY COM COLL | Minor source | No |
| MONTGOMERY CONCRETE - SOUTHLAWN LANE | Minor source | No |
| MONTGOMERY COUNTY LIBRARY | Minor source | No |
| MONTGOMERY COUNTY LIQUOR WAREHOUSE | Minor source | No |
| MONTGOMERY COUNTY RECORDS CENTER | Minor source | No |
| MONTGOMERY COUNTY RECYCLING FACILITY | Minor source | No |
| MONTGOMERY COUNTY RRF | Major source | Yes |
| MONTGOMERY COUNTY-COLESVILLE DEPOT | Minor source | No |
| MONTGOMERY CREMATORIUM, INC. | Minor source | No |
| MONTGOMERY GEN. HOSP | Minor source | No |
| MONTGOMERY KNOLLS ELEMENTARY SCHOOL | Minor source | No |
| MONTGOMERY LANE, 4720 | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.