New York City (NY) Water Quality

New York City is a large public water system in EPA region 2 that provides tap water for the 10001 - 10014, 10017 - 10041, 10044, 10045, 10060, 10069, 10080, 10081, 10090, 10101 - 10126, 10129 - 10133, 10150 - 10179, 10199, 10211 - 10213, 10249, 10257 - 10261, 10268 - 10282, 10286, 10301 - 10314, 10452 - 10475, 11101 - 11104, 11109, 11201 - 11226, 11229 - 11239, 11242, 11243, 11247, 11251, 11252, 11351, 11352, 11355 - 11375, 11378 - 11381, 11386, 11411, 11414 - 11436, 11451, 11691 - 11695 zip codes. It has 10 facilities where the water supply was tested for 97 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 77.2 µg/L. Some (9 of 76 or 12%) 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 20 µg/L. There were 2 contamintants found in the New York City 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 (16)

1,2,3-trichloropropane (16)

1,2-diphenylhydrazine (12)

1,3-butadiene (16)

1,4-dioxane (16)

1-butanol (16)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (16)

17-alpha-ethynylestradiol (16)

17-beta-estradiol (16)

1H,1H,2H,2H-perfluorodecane sulfonic acid (16)

1H,1H,2H,2H-perfluorohexane sulfonic acid (16)

1H,1H,2H,2H-perfluorooctane sulfonic acid (16)

2,4,6-trichlorophenol (12)

2,4-dichlorophenol (12)

2,4-dinitrophenol (12)

2,4-dinitrotoluene (12)

2,6-dinitrotoluene (12)

2-methoxyethanol (16)

2-methyl-phenol (12)

2-propen-1-ol (Allyl Alcohol) (16)

4,4'-dichloro dichlorophenyl ethylene (DDE) (12)

4,8-dioxa-3H-perfluorononanoic acid (16)

4-androstene-3,17-dione (16)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (16)

alpha-hexachlorocyclohexane (14)

anatoxin-a (32)

bromochloromethane (Halon 1011) (16)

bromomethane (16)

Butylated Hydroxyanisole (16)

chlorate (32)

chlorodifluoromethane (HCFC-22) (16)

chloromethane (16)

chlorpyrifos (14)

chromium (32)

chromium-6 (32)

cobalt (32)

cylindrospermopsin (32)

diazinon (12)

dimethipin (14)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (12)

diuron (12)

equilin (16)

estriol (16)

estrone (16)

ethoprop (14)

fonofos (12)

Germanium (16)

HAA5 (five regulated haloacetic acids) (76)

HAA6Br (six brominated haloacetic acids) (76)

HAA9 (nine haloacetic acids) (76)

hexafluoropropylene oxide dimer acid (GenX) (16)

linuron (12)

lithium (16)

Manganese (16)

methyl-tertiary-butyl-ether (MTBE) (12)

molinate (12)

molybdenum (32)

N-ethyl perfluorooctanesulfonamidoacetic acid (16)

N-methyl perfluorooctanesulfonamidoacetic acid (16)

nitrobenzene (12)

nitrobenzene (12)

nonafluoro-3,6-dioxaheptanoic acid (16)

o-toluidine (16)

oxyfluorfen (14)

perchlorate (12)

perfluoro(2-ethoxyethane)sulfonic acid (16)

perfluoro-3-methoxypropanoic acid (16)

perfluoro-4-methoxybutanoic acid (16)

perfluorobutanesulfonic acid (32)

perfluorobutanoic acid (16)

perfluorodecanoic acid (16)

perfluorododecanoic acid (16)

perfluoroheptanesulfonic acid (16)

perfluoroheptanoic acid (32)

perfluorohexanesulfonic acid (32)

perfluorohexanoic acid (16)

perfluorononanoic acid (32)

perfluorooctanesulfonic acid (32)

perfluorooctanoic acid (32)

perfluoropentanesulfonic acid (16)

perfluoropentanoic acid (16)

perfluorotetradecanoic acid (16)

perfluorotridecanoic acid (16)

perfluoroundecanoic acid (16)

profenofos (14)

prometon (12)

quinoline (16)

s-ethyl-dipropylthiocarbamate (EPTC) (12)

strontium (32)

tebuconazole (14)

terbacil (12)

terbufos (12)

testosterone (16)

total microcystins (32)

Total Permethrin (14)

tribufos (14)

vanadium (32)

Sampling Facilities

Tunnel 1 1S07
Surface Water (SW)

Shaft 7 Tunnel 1Entry Point to the Distribution System (EP)

Tunnel 2 1S03A
Surface Water (SW)

Shaft 3A Tunnel 2Entry Point to the Distribution System (EP)

Tunnel 3 1S03B
Surface Water (SW)

Shaft 3B Tunnel 3Entry Point to the Distribution System (EP)

Croton 1SCL1
Surface Water (SW)

Croton Distribution Chamber Low Service TunnelEntry Point to the Distribution System (EP)

Stage 2 DBP Distribution Sampling Location
Surface Water (SW)

Site 15150Distribution System (DS)
Site 18650Distribution System (DS)
Site 23450Distribution System (DS)
Site 24350Distribution System (DS)
Site 31750Distribution System (DS)
Site 31850Distribution System (DS)
Site 32350Distribution System (DS)
Site 33450Distribution System (DS)
Site 33950Distribution System (DS)
Site 37950Distribution System (DS)
Site 38250Distribution System (DS)
Site 39650Distribution System (DS)
Site 44350Distribution System (DS)
Site 45250Distribution System (DS)
Site 50250Distribution System (DS)
Site 50750Distribution System (DS)
Site 50850Distribution System (DS)
Site 52050Distribution System (DS)
Site 58650Distribution System (DS)
Site 77650Distribution System (DS)

Distribution System
Surface Water (SW)

DSMRT for Tunnel 1Maximum Residence Time (MR)
DSMRT for Tunnel 2Maximum Residence Time (MR)
DSMRT for Tunnel 3Maximum Residence Time (MR)

Distribution Sampling Point Croton
Surface Water (SW)

DSMRT for CrotonMaximum Residence Time (MR)

TUNNEL 1 EP10250
Surface Water (SW)

TUNNEL 1 - 10250Entry Point to the Distribution System (EP)

TUNNEL 2 EP12150
Surface Water (SW)

TUNNEL 2 - 12150Entry Point to the Distribution System (EP)

TUNNEL 3 EP15450
Surface Water (SW)

TUNNEL 3 - 15450Entry Point to the Distribution System (EP)

FAQ

Is New York City tap water safe to drink?

When was New York City last tested for water contamination?

The latest water samples were taken on January 2nd, 2025.