EPA-regulated facilities in Montgomery County, MD

There are 4,132 EPA-regulated facilities inside Montgomery County, Maryland. The most common kinds are hazardous waste (2,186), air emissions (1,765), water discharge (905). 42 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 59 have a violation on record. Penalties over the last five years total $6.3M across 11 sites.

Open the map of Montgomery County

4,132facilities in the county

42in significant noncompliance

59with a violation on record

$6.3Min penalties, last 5 years

By category

Category	Facilities
Hazardous waste	2,186
Treatment, storage or disposal	3
Large quantity generators	81
Small quantity generators	1,131
Transporters	16
Chemical (RMP/TRI)	43
Superfund	18
Air emissions	1,765
Major sources	11
Synthetic minor sources	18
Minor sources	1,492
Water discharge	905
Major permits	4
Minor permits	581
Drinking water systems	126
Greenhouse gas reporters	8
Data centers	8
Scrap yards	2
Recycling centers	4

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

POTOMAC WATER FILTRATION PLANT 12200 RIVER ROAD, POTOMAC, MD, 20854 Significant noncompliance · $465k in penalties
UNIFORMED SERVICE UNIVERSITY OF HEALTH SCIENCES/CNRM 4301 JONES BRIDGE RD, BETHESDA, MD, 20814 Significant noncompliance · $289k in penalties
FRANK'S SCRAP METAL 2306 PERKINS PLACE, SILVER SPRING, MD, 20910 Significant noncompliance · $5k in penalties
GAITHER HOUSE 501 B3 SOUTH FREDERICK AVENUE, GAITHERSBURG, MD, 20877 Significant noncompliance
17 BARKLEY 17 BARKLEY LANE, GAITHERSBURG, MD, 20877 Significant noncompliance
DIAMOND FARM HOMEOWNERS ASSOCIATION 1203 QUINCE ORCHARD ROAD, GAITHERSBURG, MD, 20878 Significant noncompliance
WOODLAND HILLS 1440 WAKE FOREST DR., GAITHERSBURG, MD, 20879 Significant noncompliance
QUAIL VALLEY HOA 18701 QUAIL VALLEY BLVD., GAITHERSBURG, MD, 20879 Significant noncompliance
MONTGOMERY COUNTY SOLID WASTE 16101 FREDERICK AVENUE, DERWOOD, MD, 20855 Significant noncompliance
BERKELEY SPRINGS MHC-TREATMENT PLANT GAITHERSBURG, MD, 20883 Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

UNITED PARCEL SERVICE - GAITHERSBURG (MDGAI) 9401 GAITHER ROAD, GAITHERSBURG, MD, 20877 $5.3M in penalties
WALNUT GROVE 11925 PARKLAWN DRIVE, ROCKVILLE, MD, 20852 $150k in penalties
QIAGEN SCIENCES 19300 GERMANTOWN RD, GERMANTOWN, MD, 20874 $53k in penalties
NAVAL SUPPORT ACTIVITY BETHESDA 8901 WISCONSIN AVE, BETHESDA, MD, 20889 $5k in penalties
FOOD AND DRUG ADMINISTRATION 10903 NEW HAMPSHIRE AVE, WO62,, SILVER SPRING, MD, 20903 $3k in penalties

Superfund sites

NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY 100 BUREA DRIVE, GAITHERSBURG, MD, 20899
GAITHERSBURG - CONTROL 8510 SNOUFFERS SCHOOL RD, GAITHERSBURG, MD, 20879
ROCKVILLE - CONTROL 10901 DARNSTOWN RD, GAITHERSBURG, MD, 20878
NIH CHEM GENOMICS CTR 9800 MEDICAL CENTER DR, ROCKVILLE, MD, 20850
LAYTONSVILLE-LAUNCH 5321 RIGGS RD, GAITHERSBURG, MD, 20882
FEDERAL STREET MERCURY 4201 FEDERAL STREET, ROCKVILLE, MD, 20853
SILVER SPRING RESIDENTIAL MERCURY HYDRUS ROAD, SILVER SPRING, MD, 20906
ROCKVILLE - LAUNCH MUDDY BRANCH ROAD, GAITHERSBURG, MD, 20878
US PUBLIC HEALTH SERVICE NATIONAL INSTITUTES OF HEALTH 9000 ROCKVILLE PIKE BLDG 13, BETHESDA, MD, 20892 Significant noncompliance
NAVAL SUPPORT ACTIVITY BETHESDA 8901 WISCONSIN AVE, BETHESDA, MD, 20889 $5k in penalties

Data centers

GE INFORMATION SYSTEMS 100 EDISON PARK DRIVE, GAITHERSBURG, MD, 20878
GENERAL ELECTRIC, ROCKVILLE 401 WASHINGTON STREET NORTH, ROCKVILLE, MD, 20850
ADP OF WASHINGTON 6006 EXECUTIVE BOULEVARD, ROCKVILLE, MD, 20852
PROSPERITY DRIVE DATA CENTER, LLC 12401 PROSPERITY DR, SILVER SPRING, MD, 20904
Lincoln Rackhouse Maryland 12401 Prosperity Drive, Silver Spring
GANNETT COMPANY 2240 BROADBIRCH DRIVE, SILVER SPRING, MD, 20904
KAISER PERMANENTE DATA CENTER 11961 BURMANFIELD WAY, SILVER SPRING, MD, 20906
KAISER PERMANENTE DATA CENTER 11961 BOURNEFIELD WAY, SILVER SPRING, MD, 20904

Towns in Montgomery County

Bordering counties

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.