Keene Water Dept. (NH) Water Quality

Keene Water Dept. is a large public water system in EPA region 1 that provides tap water for the 03431 zip codes. It has 7 facilities where the water supply was tested for 78 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 44 µg/L. The maximum reported level of Manganese was 32.9 µg/L. There were 2 contamintants found in the Keene Water Dept. water supply at levels that were above the minimum reporting level.

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 (7)

1H,1H,2H,2H-perfluorodecane sulfonic acid (7)

1H,1H,2H,2H-perfluorohexane sulfonic acid (7)

1H,1H,2H,2H-perfluorooctane sulfonic acid (7)

2,4-dinitrotoluene (12)

2,6-dinitrotoluene (12)

2-methoxyethanol (8)

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

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

4,8-dioxa-3H-perfluorononanoic acid (7)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (7)

alpha-hexachlorocyclohexane (8)

anatoxin-a (8)

bromochloromethane (Halon 1011) (8)

bromomethane (8)

Butylated Hydroxyanisole (8)

chlorate (16)

chlorodifluoromethane (HCFC-22) (8)

chloromethane (8)

chlorpyrifos (8)

chromium (16)

chromium-6 (16)

cobalt (16)

cylindrospermopsin (8)

dimethipin (8)

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

ethoprop (8)

Germanium (8)

HAA5 (five regulated haloacetic acids) (12)

HAA6Br (six brominated haloacetic acids) (12)

HAA9 (nine haloacetic acids) (12)

hexafluoropropylene oxide dimer acid (GenX) (7)

lithium (8)

Manganese (8)

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

molinate (12)

molybdenum (16)

N-ethyl perfluorooctanesulfonamidoacetic acid (8)

N-methyl perfluorooctanesulfonamidoacetic acid (8)

nitrobenzene (12)

nonafluoro-3,6-dioxaheptanoic acid (7)

o-toluidine (8)

oxyfluorfen (8)

perchlorate (12)

perfluoro(2-ethoxyethane)sulfonic acid (7)

perfluoro-3-methoxypropanoic acid (7)

perfluoro-4-methoxybutanoic acid (7)

perfluorobutanesulfonic acid (15)

perfluorobutanoic acid (7)

perfluorodecanoic acid (7)

perfluorododecanoic acid (7)

perfluoroheptanesulfonic acid (7)

perfluoroheptanoic acid (15)

perfluorohexanesulfonic acid (15)

perfluorohexanoic acid (7)

perfluorononanoic acid (15)

perfluorooctanesulfonic acid (15)

perfluorooctanoic acid (15)

perfluoropentanesulfonic acid (7)

perfluoropentanoic acid (7)

perfluorotetradecanoic acid (8)

perfluorotridecanoic acid (8)

perfluoroundecanoic acid (7)

profenofos (8)

quinoline (8)

s-ethyl-dipropylthiocarbamate (EPTC) (12)

strontium (16)

tebuconazole (8)

terbacil (12)

total microcystins (8)

Total Permethrin (8)

tribufos (8)

vanadium (16)

Sampling Facilities

Treatment Plant
Surface Water (SW)

Finished Water Sample @ TP (5)Entry Point to the Distribution System (EP)

Court St. Corrosion Control Bldg. GPW #1N
Ground Water (GW)

Court St. Corr. Control Bldg. GPW 1NEntry Point to the Distribution System (EP)

West St. Pump Station
Ground Water (GW)

West St. Pump Station (4) EPTDSEntry Point to the Distribution System (EP)

Distribution System
Multiple Sources (MX)

893 MarkemDistribution System (DS)
640 Marlboro RoadDistribution System (DS)
9 Giffin StreetDistribution System (DS)
512 Winchester StreetDistribution System (DS)
DSMRT for Treatment PlantMaximum Residence Time (MR)

Distribution System - GW
Ground Water (GW)

DSMRT for GPW 1NMaximum Residence Time (MR)
DSMRT for West St. PumpMaximum Residence Time (MR)

COURT ST CORROSION CONTROL BLDG /GPW 2 M
Ground Water (GW)

COURT ST CORRO CONTROL BLDG /GPW 2 M/002Entry Point to the Distribution System (EP)

COURT ST CORROSION CONTROL BLDG /GPW 4 S
Ground Water (GW)

COURT ST CORRO CONTROL BLDG /GPW 4 S/003Entry Point to the Distribution System (EP)

FAQ

Is Keene Water Dept. tap water safe to drink?

When was Keene Water Dept. last tested for water contamination?

The latest water samples were taken on May 7th, 2025.