Charleston Water (SC) Water Quality

Charleston Water is a large public water system in EPA region 4 that provides tap water for the 29401, 29404 - 29407, 29410, 29414, 29420, 29425, 29426, 29439, 29449 - 29451, 29456, 29464, 29470, 29483, 29486, 29487 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 18.438 µg/L. The maximum reported level of Manganese was 14.4 µg/L. There were 2 contamintants found in the Charleston Water water supply at levels that were above the minimum reporting level.

Contaminants

1,1-dichloroethane (4)

1,2,3-trichloropropane (4)

1,3-butadiene (4)

1,4-dioxane (4)

1-butanol (4)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (2)

17-alpha-ethynylestradiol (4)

17-beta-estradiol (4)

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

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

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

2,4-dinitrotoluene (5)

2,6-dinitrotoluene (5)

2-methoxyethanol (4)

2-propen-1-ol (Allyl Alcohol) (4)

4,4'-dichloro dichlorophenyl ethylene (DDE) (11)

4,8-dioxa-3H-perfluorononanoic acid (2)

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

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (2)

alpha-hexachlorocyclohexane (4)

anatoxin-a (8)

bromochloromethane (Halon 1011) (4)

bromomethane (4)

Butylated Hydroxyanisole (4)

chlorate (8)

chlorodifluoromethane (HCFC-22) (4)

chloromethane (4)

chlorpyrifos (4)

chromium (8)

chromium-6 (8)

cobalt (8)

cylindrospermopsin (8)

dimethipin (4)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (7)

equilin (4)

estriol (4)

estrone (4)

ethoprop (4)

Germanium (4)

HAA5 (five regulated haloacetic acids) (32)

HAA6Br (six brominated haloacetic acids) (32)

HAA9 (nine haloacetic acids) (32)

hexafluoropropylene oxide dimer acid (GenX) (2)

lithium (2)

Manganese (4)

methyl-tertiary-butyl-ether (MTBE) (4)

molinate (5)

molybdenum (8)

N-ethyl perfluorooctanesulfonamidoacetic acid (2)

N-methyl perfluorooctanesulfonamidoacetic acid (2)

nitrobenzene (4)

nonafluoro-3,6-dioxaheptanoic acid (2)

o-toluidine (4)

oxyfluorfen (4)

perchlorate (4)

perfluoro(2-ethoxyethane)sulfonic acid (2)

perfluoro-3-methoxypropanoic acid (2)

perfluoro-4-methoxybutanoic acid (2)

perfluorobutanesulfonic acid (6)

perfluorobutanoic acid (2)

perfluorodecanoic acid (2)

perfluorododecanoic acid (2)

perfluoroheptanesulfonic acid (2)

perfluoroheptanoic acid (6)

perfluorohexanesulfonic acid (6)

perfluorohexanoic acid (2)

perfluorononanoic acid (6)

perfluorooctanesulfonic acid (6)

perfluorooctanoic acid (6)

perfluoropentanesulfonic acid (2)

perfluoropentanoic acid (2)

perfluorotetradecanoic acid (2)

perfluorotridecanoic acid (2)

perfluoroundecanoic acid (2)

profenofos (4)

quinoline (4)

s-ethyl-dipropylthiocarbamate (EPTC) (5)

strontium (8)

tebuconazole (4)

terbacil (5)

testosterone (4)

total microcystins (8)

Total Permethrin (4)

tribufos (4)

vanadium (8)

Sampling Facilities

Charleston Water System
Surface Water (SW)

EPTDS from Hanahan WTPEntry Point to the Distribution System (EP)

Hanahan WTP
Surface Water (SW)

EPTDS from Hanahan WTPEntry Point to the Distribution System (EP)

Distribution System
Surface Water (SW)

1215 Rivers Reach Drive (1-12-18)Distribution System (DS)
Mabeline Rd/Trident Tech Bldg 900 (1-03-01)Distribution System (DS)
5098 Dorchester Road (Oakridge Area) (1-17-11)Distribution System (DS)
821 Robert E. Lee Blvd. - (1-04-07)Distribution System (DS)
687 Castle Pinkney-Stiles Point Arias (1-14-11)Distribution System (DS)
Remount Rd. & Murray (1-03-03)Distribution System (DS)
706 W. Harrison-Moreland (1-25-13)Distribution System (DS)
St. Paul's FD-Hollywood (1-22-15)Distribution System (DS)
St Pauls Fire DepartmentMaximum Residence Time (MR)

Distribution System
Surface Water (SW)

St. Pauls Fire DepartmentMaximum Residence Time (MR)

HANAHAN WATER TREATMENT PLANT
Surface Water (SW)

Entry Point to the Distribution System (EP)

FAQ

Is Charleston Water tap water safe to drink?

When was Charleston Water last tested for water contamination?

The latest water samples were taken on June 16th, 2025.