City of Sunnyvale (CA) Water Quality

City of Sunnyvale is a large public water system in EPA region 9 that provides tap water for the 94085 - 94087 zip codes. It has 32 facilities where the water supply was tested for 85 chemical contaminants that impact tap water quality and human health.

The maximum reported level of 1-butanol was 2.3 µg/L. The maximum reported level of alpha-hexachlorocyclohexane was 0.016 µg/L. Some (1 of 20 or 5%) of the latest water samples showed levels of alpha-hexachlorocyclohexane that were at or above unsafe concentration levels. The maximum reported level of HAA5 (five regulated haloacetic acids) was 44 µg/L. The maximum reported level of Manganese was 4.8 µg/L. There were 4 contamintants found in the City of Sunnyvale 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 (20)

1,2,3-trichloropropane (20)

1,3-butadiene (20)

1,4-dioxane (20)

1-butanol (20)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (20)

17-alpha-ethynylestradiol (20)

17-beta-estradiol (20)

1H,1H,2H,2H-perfluorodecane sulfonic acid (20)

1H,1H,2H,2H-perfluorohexane sulfonic acid (20)

1H,1H,2H,2H-perfluorooctane sulfonic acid (20)

2,4-dinitrotoluene (14)

2,6-dinitrotoluene (14)

2-methoxyethanol (20)

2-propen-1-ol (Allyl Alcohol) (20)

4,4'-dichloro dichlorophenyl ethylene (DDE) (14)

4,8-dioxa-3H-perfluorononanoic acid (20)

4-androstene-3,17-dione (20)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (20)

alpha-hexachlorocyclohexane (20)

anatoxin-a (16)

bromochloromethane (Halon 1011) (20)

bromomethane (20)

Butylated Hydroxyanisole (20)

chlorate (24)

chlorodifluoromethane (HCFC-22) (20)

chloromethane (20)

chlorpyrifos (20)

chromium (24)

chromium-6 (24)

cobalt (24)

cylindrospermopsin (16)

dimethipin (20)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (14)

equilin (20)

estriol (20)

estrone (20)

ethoprop (20)

Germanium (20)

HAA5 (five regulated haloacetic acids) (32)

HAA6Br (six brominated haloacetic acids) (32)

HAA9 (nine haloacetic acids) (32)

hexafluoropropylene oxide dimer acid (GenX) (20)

lithium (20)

Manganese (20)

methyl-tertiary-butyl-ether (MTBE) (14)

molinate (14)

molybdenum (24)

N-ethyl perfluorooctanesulfonamidoacetic acid (20)

N-methyl perfluorooctanesulfonamidoacetic acid (20)

nitrobenzene (14)

nonafluoro-3,6-dioxaheptanoic acid (20)

o-toluidine (20)

oxyfluorfen (20)

perchlorate (14)

perfluoro(2-ethoxyethane)sulfonic acid (20)

perfluoro-3-methoxypropanoic acid (20)

perfluoro-4-methoxybutanoic acid (20)

perfluorobutanesulfonic acid (40)

perfluorobutanoic acid (20)

perfluorodecanoic acid (20)

perfluorododecanoic acid (20)

perfluoroheptanesulfonic acid (20)

perfluoroheptanoic acid (40)

perfluorohexanesulfonic acid (40)

perfluorohexanoic acid (20)

perfluorononanoic acid (40)

perfluorooctanesulfonic acid (40)

perfluorooctanoic acid (40)

perfluoropentanesulfonic acid (20)

perfluoropentanoic acid (20)

perfluorotetradecanoic acid (20)

perfluorotridecanoic acid (20)

perfluoroundecanoic acid (20)

profenofos (20)

quinoline (20)

s-ethyl-dipropylthiocarbamate (EPTC) (14)

strontium (24)

tebuconazole (20)

terbacil (14)

testosterone (20)

total microcystins (16)

Total Permethrin (20)

tribufos (20)

vanadium (24)

Sampling Facilities

Hamilton Well 2
Ground Water (GW)

Entry Point to Dist. SystemEntry Point to the Distribution System (EP)

Hamilton Well 3
Ground Water (GW)

Entry Point to Dist. SystemEntry Point to the Distribution System (EP)

Ortega Well
Ground Water (GW)

Entry Point to Dist. SystemEntry Point to the Distribution System (EP)

Raynor Well
Ground Water (GW)

Entry Point to Dist. SystemEntry Point to the Distribution System (EP)

Serra Well
Ground Water (GW)

Entry Point to Dist. SystemEntry Point to the Distribution System (EP)

Westmoor Well
Ground Water (GW)

Entry Point to Dist. SystemEntry Point to the Distribution System (EP)

SFPUC Intertie
Surface Water (SW)

SFPUC Turnout @ Fair OaksEntry Point to the Distribution System (EP)

SCVWD Intertie
Surface Water (SW)

SCVWD Turnout @ Wright AveEntry Point to the Distribution System (EP)

#2 - Duane & Lawrence
Surface Water (SW)

Stage 2 DBPR SiteDistribution System (DS)

#7 - Fair Oaks
Surface Water (SW)

Stage 2 DBPR SiteDistribution System (DS)

#20 - Waxwing & Lochinvar
Multiple Sources (MX)

Stage 2 DBPR SiteDistribution System (DS)

#29 - 814 Quetta Ave
Multiple Sources (MX)

Stage 2 DBPR SiteDistribution System (DS)

#31 - Fremont & Mary
Multiple Sources (MX)

Stage 2 DBPR SiteDistribution System (DS)

#35 - Wright & Lasalle
Multiple Sources (MX)

Stage 2 DBPR SiteDistribution System (DS)

#39 - 1379 Bedford Ave.
Multiple Sources (MX)

Stage 2 DBPR SiteDistribution System (DS)

#46 - Sunset & Washington
Surface Water (SW)

Stage 2 DBPR SiteDistribution System (DS)

Distribution System
Multiple Sources (MX)

SMP #46 @ Sunset & WashingtonMaximum Residence Time (MR)
SMP #27 @ Sidney & BellfryMaximum Residence Time (MR)

CENTRAL 02
Ground Water (GW)

Central WellEntry Point to the Distribution System (EP)

LOSSE 01 - STANDBY
Ground Water (GW)

Losse WellEntry Point to the Distribution System (EP)

San Francisco @ Lawrence
Surface Water (SW)

San Francisco @ LawrenceEntry Point to the Distribution System (EP)

San Francisco @ Borregas
Surface Water (SW)

San Francisco @ BorregasEntry Point to the Distribution System (EP)

San Francisco @ Lockheed
Surface Water (SW)

San Francisco @ LockheedEntry Point to the Distribution System (EP)

San Francisco @ Palomar
Surface Water (SW)

San Francisco @ PalomarEntry Point to the Distribution System (EP)

San Francisco @ Mary
Surface Water (SW)

San Francisco @ MaryEntry Point to the Distribution System (EP)

SCVWD - SUNNYVALE CONNECTION
Surface Water (SW)

Sunnyvale entry pointEntry Point to the Distribution System (EP)

CENTRAL 02
Ground Water (GW)

CENTRAL 02 06S/02W-36A02SR (SR)

HAMILTON 02
Ground Water (GW)

HAMILTON 02 07S/02W-02E01SR (SR)

HAMILTON 03
Ground Water (GW)

HAMILTON 03 07S/02W-02E02SR (SR)

ORTEGA WELL 11
Ground Water (GW)

ORTEGA WELL 11 07S/02W-12A01SR (SR)

RAYNOR WELL
Ground Water (GW)

RAYNOR WELL 07S/01W-06R02SR (SR)

SERRA
Ground Water (GW)

SERRA 07S/02W-11A01SR (SR)

WESTMOOR 01
Ground Water (GW)

WESTMOOR 01 07S/02W-11G02SR (SR)

FAQ

Is City of Sunnyvale tap water safe to drink?

When was City of Sunnyvale last tested for water contamination?

The latest water samples were taken on January 22nd, 2025.