City of Cupertino (CA) Water Quality

City of Cupertino is a large public water system in EPA region 9 that provides tap water for the 94024 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 22.22 µg/L. The maximum reported level of Manganese was 1.2 µg/L. There were 2 contamintants found in the City of Cupertino water supply at levels that were above the minimum reporting level.

Contaminants

1,1-dichloroethane (6)

1,2,3-trichloropropane (6)

1,3-butadiene (6)

1,4-dioxane (6)

1-butanol (5)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (5)

1H,1H,2H,2H-perfluorodecane sulfonic acid (5)

1H,1H,2H,2H-perfluorohexane sulfonic acid (5)

1H,1H,2H,2H-perfluorooctane sulfonic acid (5)

2,4-dinitrotoluene (2)

2,6-dinitrotoluene (2)

2-methoxyethanol (5)

2-propen-1-ol (Allyl Alcohol) (5)

4,4'-dichloro dichlorophenyl ethylene (DDE) (2)

4,8-dioxa-3H-perfluorononanoic acid (5)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (5)

alpha-hexachlorocyclohexane (5)

anatoxin-a (8)

bromochloromethane (Halon 1011) (6)

bromomethane (6)

Butylated Hydroxyanisole (5)

chlorate (8)

chlorodifluoromethane (HCFC-22) (6)

chloromethane (6)

chlorpyrifos (5)

chromium (8)

chromium-6 (8)

cobalt (8)

cylindrospermopsin (8)

dimethipin (5)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (2)

ethoprop (5)

Germanium (5)

HAA5 (five regulated haloacetic acids) (8)

HAA6Br (six brominated haloacetic acids) (8)

HAA9 (nine haloacetic acids) (8)

hexafluoropropylene oxide dimer acid (GenX) (5)

lithium (6)

Manganese (5)

methyl-tertiary-butyl-ether (MTBE) (1)

molinate (2)

molybdenum (8)

N-ethyl perfluorooctanesulfonamidoacetic acid (6)

N-methyl perfluorooctanesulfonamidoacetic acid (6)

nitrobenzene (1)

nonafluoro-3,6-dioxaheptanoic acid (5)

o-toluidine (5)

oxyfluorfen (5)

perchlorate (2)

perfluoro(2-ethoxyethane)sulfonic acid (5)

perfluoro-3-methoxypropanoic acid (5)

perfluoro-4-methoxybutanoic acid (5)

perfluorobutanesulfonic acid (11)

perfluorobutanoic acid (5)

perfluorodecanoic acid (5)

perfluorododecanoic acid (5)

perfluoroheptanesulfonic acid (5)

perfluoroheptanoic acid (11)

perfluorohexanesulfonic acid (11)

perfluorohexanoic acid (5)

perfluorononanoic acid (11)

perfluorooctanesulfonic acid (11)

perfluorooctanoic acid (11)

perfluoropentanesulfonic acid (5)

perfluoropentanoic acid (5)

perfluorotetradecanoic acid (6)

perfluorotridecanoic acid (6)

perfluoroundecanoic acid (5)

profenofos (5)

quinoline (5)

s-ethyl-dipropylthiocarbamate (EPTC) (2)

strontium (8)

tebuconazole (5)

terbacil (2)

total microcystins (8)

Total Permethrin (5)

tribufos (5)

vanadium (8)

Sampling Facilities

SCVWD - Mann Connection
Surface Water (SW)

Mann TurnoutEntry Point to the Distribution System (EP)

Mann Station Chlorination Station
Ground Water (GW)

Mann Chlorinated SampleEntry Point to the Distribution System (EP)

Distribution System
Multiple Sources (MX)

SP132 - 23500 Cristo ReyDistribution System (DS)
SP135 - Stevens Crk Blvd x RidgewayDistribution System (DS)

Franco Court Well 2
Ground Water (GW)

Franco Ct. 2 TreatedEntry Point to the Distribution System (EP)

SCVWD Intertie
Surface Water (SW)

Mann ConnectionEntry Point to the Distribution System (EP)

Distribution System
Multiple Sources (MX)

DSMRT for SCVWD Sample #135Maximum Residence Time (MR)

FLOWERING PEAR COURT WELL 03
Ground Water (GW)

FLOWERING PEAR COUR 07S/02W-12F01SR (SR)

FAQ

Is City of Cupertino tap water safe to drink?

When was City of Cupertino last tested for water contamination?

The latest water samples were taken on November 20th, 2023.