Great Oaks Water Co., Inc. (CA) Water Quality

Great Oaks Water Co., Inc. is a large public water system in EPA region 9 that provides tap water for the 95037, 95119, 95120, 95136, 95139 zip codes. It has 34 facilities where the water supply was tested for 63 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 2 µg/L. The maximum reported level of Manganese was 2.3 µg/L. There were 2 contamintants found in the Great Oaks Water Co., Inc. water supply at levels that were above the minimum reporting level.

Contaminants

1,1-dichloroethane (26)

1,2,3-trichloropropane (26)

1,2-diphenylhydrazine (17)

1,3-butadiene (26)

1,4-dioxane (26)

1-butanol (34)

2,4,6-trichlorophenol (29)

2,4-dichlorophenol (29)

2,4-dinitrophenol (29)

2,4-dinitrotoluene (29)

2,6-dinitrotoluene (29)

2-methoxyethanol (34)

2-methyl-phenol (29)

2-propen-1-ol (Allyl Alcohol) (34)

4,4'-dichloro dichlorophenyl ethylene (DDE) (29)

alpha-hexachlorocyclohexane (34)

bromochloromethane (Halon 1011) (26)

bromomethane (26)

Butylated Hydroxyanisole (34)

chlorate (28)

chlorodifluoromethane (HCFC-22) (26)

chloromethane (26)

chlorpyrifos (34)

chromium (28)

chromium-6 (28)

cobalt (28)

diazinon (17)

dimethipin (34)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (30)

diuron (29)

ethoprop (34)

fonofos (17)

Germanium (34)

HAA5 (five regulated haloacetic acids) (2)

HAA6Br (six brominated haloacetic acids) (2)

HAA9 (nine haloacetic acids) (2)

linuron (29)

Manganese (34)

methyl-tertiary-butyl-ether (MTBE) (23)

molinate (29)

molybdenum (28)

nitrobenzene (17)

nitrobenzene (23)

o-toluidine (34)

oxyfluorfen (34)

perchlorate (31)

perfluorobutanesulfonic acid (26)

perfluoroheptanoic acid (26)

perfluorohexanesulfonic acid (26)

perfluorononanoic acid (26)

perfluorooctanesulfonic acid (26)

perfluorooctanoic acid (26)

profenofos (34)

prometon (17)

quinoline (34)

s-ethyl-dipropylthiocarbamate (EPTC) (29)

strontium (28)

tebuconazole (34)

terbacil (29)

terbufos (17)

Total Permethrin (34)

tribufos (34)

vanadium (28)

Sampling Facilities

Well 1
Ground Water (GW)

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

Well 2
Ground Water (GW)

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

Well 4
Ground Water (GW)

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

Well 7
Ground Water (GW)

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

Well 8
Ground Water (GW)

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

Well 9
Ground Water (GW)

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

Well 10
Ground Water (GW)

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

Well 11
Ground Water (GW)

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

Well 12
Ground Water (GW)

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

Well 19
Ground Water (GW)

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

Well 21
Ground Water (GW)

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

Well 20
Ground Water (GW)

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

Well 22
Ground Water (GW)

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

Well 23
Ground Water (GW)

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

Well 24
Ground Water (GW)

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

Well 16
Ground Water (GW)

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

Well 23A
Ground Water (GW)

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

Distribution System
Ground Water (GW)

Whispering OaksDistribution System (DS)

Distribution System
Ground Water (GW)

DSMRT for all WellsMaximum Residence Time (MR)

WELL 01 DISCOVERY
Ground Water (GW)

WELL 01 DISCOVERY 08S/01E-01J02SR (SR)

WELL 02 BANGER
Ground Water (GW)

WELL 02 BANGER 08S/01E-12P01SR (SR)

WELL 04 SANTA TERESA
Ground Water (GW)

WELL 04 SANTA TERES 08S/02E-18K10SR (SR)

WELL 07 MONTEREY RD
Ground Water (GW)

WELL 07 MONTEREY RD 08S/02E-17J10SR (SR)

WELL 08 CHYNOWETH - INACTIVE
Ground Water (GW)

WELL 08 CHYNOWETH - 08S/01E-12D10Entry Point to the Distribution System (EP)

WELL 09 GREAT OAKS DR
Ground Water (GW)

WELL 09 GREAT OAKS 08S/02E-06N10SR (SR)

WELL 10 S TER HOSP
Ground Water (GW)

WELL 10 S TER HOSP 08S/02E-18D10SR (SR)

WELL 11
Ground Water (GW)

WELL 11 08S/02E-18E10SR (SR)

WELL 12
Ground Water (GW)

WELL 12 08S/02E-18E11SR (SR)

WELL 15
Ground Water (GW)

WELL 15 08S/02E-08M07SR (SR)

WELL 16
Ground Water (GW)

WELL 16 08S/02E-17G11SR (SR)

WELL 18
Ground Water (GW)

WELL 18 08S/02E-08Q01SR (SR)

WELL 19
Ground Water (GW)

WELL 19 08S/02E-16P02SR (SR)

WELL 21
Ground Water (GW)

WELL 21 4310022-018SR (SR)

WELL 20
Ground Water (GW)

WELL 20 4310022-019SR (SR)

FAQ

Is Great Oaks Water Co., Inc. tap water safe to drink?

When was Great Oaks Water Co., Inc. last tested for water contamination?

The latest water samples were taken on December 17th, 2020.