EPA-regulated facilities in Howard County, MD

There are 1,684 EPA-regulated facilities inside Howard County, Maryland. The most common kinds are hazardous waste (931), water discharge (465), air emissions (462). 15 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 28 have a violation on record. Penalties over the last five years total $7.4M across 12 sites.

Open the map of Howard County

1,684facilities in the county

15in significant noncompliance

28with a violation on record

$7.4Min penalties, last 5 years

By category

Category	Facilities
Hazardous waste	931
Treatment, storage or disposal	1
Large quantity generators	56
Small quantity generators	452
Transporters	10
Chemical (RMP/TRI)	46
Superfund	1
Air emissions	462
Major sources	5
Synthetic minor sources	13
Minor sources	327
Water discharge	465
Major permits	2
Minor permits	361
Drinking water systems	116
Greenhouse gas reporters	3
Data centers	2

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.

PRECOAT METALS DIVISION OF SEQUA CORPORATION 6754 SANTA BARBARA CT, ELKRIDGE, MD, 21075 Significant noncompliance · $13k in penalties
GLENELG COUNTRY SCHOOL,INC. 12793 FOLLY QUARTER ROAD, GLENELG, MD, 21737 Significant noncompliance
FOX VALLEY ESTATES 3320 GREAT VA;LLEY DRIVE, WEST, FRIENDSHIP, MD, 21794 Significant noncompliance
WAH PROPERTY MULTI-USE FACILITY 127999 BUTTERCUP COURT, WEST FRIENDSHIP, MD, 21794 Significant noncompliance
NOB HILL SWIM CLUB 9538 WESTWOOD DRIVE, ELLICOTT CITY, MD, 21042 Significant noncompliance
ATHOLTON SWIM CLUB 6731 SENECA DRIVE, COLUMBIA, MD, 21046 Significant noncompliance
RESIDENCE INN COLUMBIA 4950 BEAVER RUN, ELLICOTT CITY, MD, 21043 Significant noncompliance
CATTAIL CREEK COUNTRY CLUB 3600 CATTAIL CREEK DRIVE, GLENWOOD, MD, 21738 Significant noncompliance
LYHUS PROPERTY 12170 LIME KILN ROAD, FULTON, MD, 20759 Significant noncompliance
HAMMOND PARK RECREATION, INC. 8034 HELMART DRIVE, LAUREL, MD, 20723 Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

UNITED PARCEL SERVICE 8285 STAYTON DR, JESSUP, MD, 20794 $5.3M in penalties
TFORCE FREIGHT - BALTIMORE 6571 WASHINGTON BLVD, BALTIMORE, MD, 21227 $860k in penalties
CAROLINA FREIGHT COMPANY 6720 WASHINGTON BLVD, ELKRIDGE, MD, 21075 $535k in penalties
ASHLEIGH KNOLLS SHARED SEWAGE DISPOSAL FACILITY 7221 FAWN CROSSING DRIVE, CLARKSVILLE, MD, 21029 $150k in penalties
WALNUT CREEK SUBDIVISION - SHARED FACILITY 12320 AUTUMN TREE LANE, ELLICOTT CITY, MD, 21029 $150k in penalties

Superfund sites

NATIONAL SECURITY AGENCY RUMSEY RD B 2, COLUMBIA, MD, 21045

Data centers

Unnamed data center (OSM) 9800 South Eternal Rings Drive, Laurel
MICROSOFT CORPORATION - YELLOW FACILITY 8201,8211,8221, & 8321 DORSEY RUN ROAD, ANNAPOLIS JUNCTION, MD, 20701

Towns in Howard 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.