DC Water & Sewer Authority (DC) Water Quality

DC Water & Sewer Authority is a large public water system in EPA region 3 that provides tap water for the 20001 - 20013, 20016 - 20020, 20024, 20027, 20030, 20033, 20036 - 20045, 20049, 20050, 20053, 20056 - 20071, 20074 - 20078, 20081, 20082, 20091, 20202 - 20204, 20207, 20208, 20211 - 20224, 20227 - 20230, 20233, 20237 - 20242, 20245, 20251, 20252, 20260 - 20262, 20266, 20270, 20289, 20301, 20306, 20314, 20318, 20319, 20340, 20355, 20372 - 20376, 20388 - 20395, 20401 - 20408, 20411 - 20429, 20433 - 20437, 20440 - 20442, 20447, 20453, 20460, 20468 - 20470, 20500 - 20511, 20520 - 20531, 20534 - 20544, 20547 - 20549, 20552 - 20555, 20559, 20560, 20566, 20571 - 20573, 20576 - 20581, 20586, 20591, 20594, 20599 zip codes. It has 5 facilities where the water supply was tested for 75 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 66 µg/L. Some (5 of 48 or 10%) 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 1.2 µg/L. There were 2 contamintants found in the DC Water & Sewer Authority 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 (8)

1,2,3-trichloropropane (8)

1,3-butadiene (8)

1,4-dioxane (8)

1-butanol (8)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (8)

17-alpha-ethynylestradiol (8)

17-beta-estradiol (8)

1H,1H,2H,2H-perfluorodecane sulfonic acid (8)

1H,1H,2H,2H-perfluorohexane sulfonic acid (8)

1H,1H,2H,2H-perfluorooctane sulfonic acid (8)

2-methoxyethanol (8)

2-propen-1-ol (Allyl Alcohol) (8)

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

4-androstene-3,17-dione (8)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (8)

alpha-hexachlorocyclohexane (8)

anatoxin-a (16)

bromochloromethane (Halon 1011) (8)

bromomethane (8)

Butylated Hydroxyanisole (7)

chlorate (16)

chlorodifluoromethane (HCFC-22) (8)

chloromethane (8)

chlorpyrifos (8)

chromium (16)

chromium-6 (16)

cobalt (16)

cylindrospermopsin (16)

dimethipin (8)

equilin (8)

estriol (8)

estrone (8)

ethoprop (8)

Germanium (8)

HAA5 (five regulated haloacetic acids) (48)

HAA6Br (six brominated haloacetic acids) (48)

HAA9 (nine haloacetic acids) (48)

hexafluoropropylene oxide dimer acid (GenX) (8)

lithium (8)

Manganese (8)

molybdenum (16)

N-ethyl perfluorooctanesulfonamidoacetic acid (8)

N-methyl perfluorooctanesulfonamidoacetic acid (8)

nonafluoro-3,6-dioxaheptanoic acid (8)

o-toluidine (7)

oxyfluorfen (8)

perfluoro(2-ethoxyethane)sulfonic acid (8)

perfluoro-3-methoxypropanoic acid (8)

perfluoro-4-methoxybutanoic acid (8)

perfluorobutanesulfonic acid (16)

perfluorobutanoic acid (8)

perfluorodecanoic acid (8)

perfluorododecanoic acid (8)

perfluoroheptanesulfonic acid (8)

perfluoroheptanoic acid (16)

perfluorohexanesulfonic acid (16)

perfluorohexanoic acid (8)

perfluorononanoic acid (16)

perfluorooctanesulfonic acid (16)

perfluorooctanoic acid (16)

perfluoropentanesulfonic acid (8)

perfluoropentanoic acid (8)

perfluorotetradecanoic acid (8)

perfluorotridecanoic acid (8)

perfluoroundecanoic acid (8)

profenofos (8)

quinoline (7)

strontium (16)

tebuconazole (8)

testosterone (8)

total microcystins (15)

Total Permethrin (8)

tribufos (8)

vanadium (16)

Sampling Facilities

Dalecarlia Connection
Surface Water (SW)

Dale 18Entry Point to the Distribution System (EP)
EPTDS - Dalecarlia PlantEntry Point to the Distribution System (EP)

McMillan Connection
Surface Water (SW)

McMillan J SouthEntry Point to the Distribution System (EP)

Distribution System
Surface Water (SW)

8th St. NEDistribution System (DS)
E. Capital St. NEDistribution System (DS)
Bunker Hill Rd. NEDistribution System (DS)
Rhode Island Ave. NEDistribution System (DS)
Kenndey St. NWDistribution System (DS)
Kalmia Rd. NWDistribution System (DS)
Broad Branch Rd. NWDistribution System (DS)
56th St. NEDistribution System (DS)
Martin Luther King Ave. SEDistribution System (DS)
Overlook Ave. SWDistribution System (DS)
49th St. NEDistribution System (DS)
Water St. SWDistribution System (DS)

Distribution System - Dalecarlia
Surface Water (SW)

7425 Georgia Avenue NC (McDonald's)Maximum Residence Time (MR)

Distribution System - McMillian
Surface Water (SW)

*Site 2H-6* FH #17, 1227 Monroe St NEMaximum Residence Time (MR)

FAQ

Is DC Water & Sewer Authority tap water safe to drink?

When was DC Water & Sewer Authority last tested for water contamination?

The latest water samples were taken on October 16th, 2024.