City of Baltimore (MD) Water Quality

City of Baltimore is a large public water system in EPA region 3 that provides tap water for the 21013, 21030, 21031, 21051, 21052, 21071, 21085, 21092, 21117, 21131, 21136, 21156, 21163, 21202 - 21224, 21228 - 21231, 21234 - 21237, 21240, 21241, 21250, 21251, 21264, 21273, 21278, 21279, 21282, 21287, 21290, 21298 zip codes. It has 5 facilities where the water supply was tested for 85 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 130.126 µg/L. Some (7 of 64 or 11%) of the latest water samples showed levels of HAA5 (five regulated haloacetic acids) that were at or above unsafe concentration levels. The maximum reported level of Manganese was 1.58 µg/L. There were 2 contamintants found in the City of Baltimore water supply at levels that were above the minimum reporting level. 1 of the contaminants were above the reference level, which means they may pose a risk to human health.

Contaminants

1,1-dichloroethane (12)

1,2,3-trichloropropane (12)

1,3-butadiene (12)

1,4-dioxane (12)

1-butanol (12)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (12)

17-alpha-ethynylestradiol (10)

17-beta-estradiol (10)

1H,1H,2H,2H-perfluorodecane sulfonic acid (12)

1H,1H,2H,2H-perfluorohexane sulfonic acid (12)

1H,1H,2H,2H-perfluorooctane sulfonic acid (12)

2,4-dinitrotoluene (8)

2,6-dinitrotoluene (8)

2-methoxyethanol (12)

2-propen-1-ol (Allyl Alcohol) (12)

4,4'-dichloro dichlorophenyl ethylene (DDE) (8)

4,8-dioxa-3H-perfluorononanoic acid (12)

4-androstene-3,17-dione (10)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (12)

alpha-hexachlorocyclohexane (12)

anatoxin-a (24)

bromochloromethane (Halon 1011) (12)

bromomethane (12)

Butylated Hydroxyanisole (12)

chlorate (20)

chlorodifluoromethane (HCFC-22) (12)

chloromethane (12)

chlorpyrifos (12)

chromium (20)

chromium-6 (20)

cobalt (20)

cylindrospermopsin (24)

dimethipin (12)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (8)

equilin (10)

estriol (10)

estrone (10)

ethoprop (12)

Germanium (12)

HAA5 (five regulated haloacetic acids) (64)

HAA6Br (six brominated haloacetic acids) (64)

HAA9 (nine haloacetic acids) (64)

hexafluoropropylene oxide dimer acid (GenX) (12)

lithium (12)

Manganese (12)

methyl-tertiary-butyl-ether (MTBE) (8)

molinate (8)

molybdenum (20)

N-ethyl perfluorooctanesulfonamidoacetic acid (12)

N-methyl perfluorooctanesulfonamidoacetic acid (12)

nitrobenzene (8)

nonafluoro-3,6-dioxaheptanoic acid (12)

o-toluidine (12)

oxyfluorfen (12)

perchlorate (8)

perfluoro(2-ethoxyethane)sulfonic acid (12)

perfluoro-3-methoxypropanoic acid (12)

perfluoro-4-methoxybutanoic acid (12)

perfluorobutanesulfonic acid (24)

perfluorobutanoic acid (12)

perfluorodecanoic acid (12)

perfluorododecanoic acid (12)

perfluoroheptanesulfonic acid (12)

perfluoroheptanoic acid (24)

perfluorohexanesulfonic acid (24)

perfluorohexanoic acid (12)

perfluorononanoic acid (24)

perfluorooctanesulfonic acid (24)

perfluorooctanoic acid (24)

perfluoropentanesulfonic acid (12)

perfluoropentanoic acid (12)

perfluorotetradecanoic acid (12)

perfluorotridecanoic acid (12)

perfluoroundecanoic acid (12)

profenofos (12)

quinoline (12)

s-ethyl-dipropylthiocarbamate (EPTC) (8)

strontium (20)

tebuconazole (12)

terbacil (8)

testosterone (10)

total microcystins (24)

Total Permethrin (12)

tribufos (12)

vanadium (20)

Sampling Facilities

Ashburton Filter Plant
Surface Water (SW)

WTP POEEntry Point to the Distribution System (EP)

Montebello Filter Plant #1
Surface Water (SW)

WTP POEEntry Point to the Distribution System (EP)

Montebello Filter Plant #2
Surface Water (SW)

WTP POEEntry Point to the Distribution System (EP)

Distribution System
Surface Water (SW)

20 EngineDistribution System (DS)
SecurityDistribution System (DS)
Deer ParkDistribution System (DS)
Reisterstown AutowashDistribution System (DS)
45 TruckDistribution System (DS)
SparksDistribution System (DS)
HillendaleDistribution System (DS)
CarneyDistribution System (DS)
Wise & BearDistribution System (DS)
ColgateDistribution System (DS)
Harewood ParkDistribution System (DS)
36 EngineDistribution System (DS)
Owings MillsDistribution System (DS)
5 TruckDistribution System (DS)
LuthervilleDistribution System (DS)
41 EngineDistribution System (DS)

Distribution System
Surface Water (SW)

DSMRT for Ashburton Filter PlantMaximum Residence Time (MR)
DSMRT for Montebello Filter PlantsMaximum Residence Time (MR)

FAQ

Is City of Baltimore tap water safe to drink?

When was City of Baltimore last tested for water contamination?

The latest water samples were taken on May 13th, 2025.