City of Patterson (CA) Water Quality

City of Patterson is a large public water system in EPA region 9 that provides tap water for the 95363 zip codes. It has 15 facilities where the water supply was tested for 75 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 1.59 µg/L. The maximum reported level of Manganese was 14.5 µg/L. There were 2 contamintants found in the City of Patterson water supply at levels that were above the minimum reporting level.

Contaminants

1,1-dichloroethane (14)

1,2,3-trichloropropane (14)

1,3-butadiene (14)

1,4-dioxane (14)

1-butanol (14)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (12)

1H,1H,2H,2H-perfluorodecane sulfonic acid (12)

1H,1H,2H,2H-perfluorohexane sulfonic acid (12)

1H,1H,2H,2H-perfluorooctane sulfonic acid (12)

2,4-dinitrotoluene (10)

2,6-dinitrotoluene (10)

2-methoxyethanol (14)

2-propen-1-ol (Allyl Alcohol) (14)

4,4'-dichloro dichlorophenyl ethylene (DDE) (10)

4,8-dioxa-3H-perfluorononanoic acid (12)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (12)

alpha-hexachlorocyclohexane (14)

bromochloromethane (Halon 1011) (14)

bromomethane (14)

Butylated Hydroxyanisole (14)

chlorate (26)

chlorodifluoromethane (HCFC-22) (14)

chloromethane (14)

chlorpyrifos (14)

chromium (26)

chromium-6 (26)

cobalt (26)

dimethipin (14)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (10)

ethoprop (14)

Germanium (14)

HAA5 (five regulated haloacetic acids) (8)

HAA6Br (six brominated haloacetic acids) (8)

HAA9 (nine haloacetic acids) (8)

hexafluoropropylene oxide dimer acid (GenX) (12)

lithium (12)

Manganese (14)

methyl-tertiary-butyl-ether (MTBE) (10)

molinate (10)

molybdenum (26)

N-ethyl perfluorooctanesulfonamidoacetic acid (12)

N-methyl perfluorooctanesulfonamidoacetic acid (12)

nitrobenzene (10)

nonafluoro-3,6-dioxaheptanoic acid (12)

o-toluidine (14)

oxyfluorfen (14)

perchlorate (12)

perfluoro(2-ethoxyethane)sulfonic acid (12)

perfluoro-3-methoxypropanoic acid (12)

perfluoro-4-methoxybutanoic acid (12)

perfluorobutanesulfonic acid (26)

perfluorobutanoic acid (12)

perfluorodecanoic acid (12)

perfluorododecanoic acid (12)

perfluoroheptanesulfonic acid (12)

perfluoroheptanoic acid (26)

perfluorohexanesulfonic acid (26)

perfluorohexanoic acid (12)

perfluorononanoic acid (26)

perfluorooctanesulfonic acid (26)

perfluorooctanoic acid (26)

perfluoropentanesulfonic acid (12)

perfluoropentanoic acid (12)

perfluorotetradecanoic acid (12)

perfluorotridecanoic acid (12)

perfluoroundecanoic acid (12)

profenofos (14)

quinoline (14)

s-ethyl-dipropylthiocarbamate (EPTC) (10)

strontium (26)

tebuconazole (14)

terbacil (10)

Total Permethrin (14)

tribufos (14)

vanadium (26)

Sampling Facilities

Well 6
Ground Water (GW)

EP #11 - Well 6Entry Point to the Distribution System (EP)
Well 6 Sample PointEntry Point to the Distribution System (EP)

Well 5
Ground Water (GW)

EP #8 - Well 5Entry Point to the Distribution System (EP)

Well 8
Ground Water (GW)

EP #15 - Well 8Entry Point to the Distribution System (EP)

Well 7
Ground Water (GW)

EP #13 - Well 7Entry Point to the Distribution System (EP)

Well 11
Ground Water (GW)

EP #16 - Well 11Entry Point to the Distribution System (EP)

Well 9
Ground Water (GW)

EP #17 Well 9Entry Point to the Distribution System (EP)

Well 2
Ground Water (GW)

EP #6 - Well 2Entry Point to the Distribution System (EP)

Distribution System
Ground Water (GW)

1218 Swan DrDistribution System (DS)
15041 Rogers RdDistribution System (DS)
248 Durer DrDistribution System (DS)
1335 Daisy DrDistribution System (DS)

Distribution System
Ground Water (GW)

DSMRT for Well 6Maximum Residence Time (MR)
DSMRT for Well 5Maximum Residence Time (MR)
DSMRT for Well 2Maximum Residence Time (MR)
DSMRT for Well 8Maximum Residence Time (MR)
DSMRT for Well 7Maximum Residence Time (MR)
DSMRT for Well 11Maximum Residence Time (MR)

EP- #010 WELL 04 - TREATED
Ground Water (GW)

Well 4 Sample PointEntry Point to the Distribution System (EP)

WELL 04 - WARD AVE
Ground Water (GW)

WELL 04SR (SR)

WELL 05 - HARTLEY STREET
Ground Water (GW)

WELL 05SR (SR)

WELL 02 - N. 5TH
Ground Water (GW)

WELL 02SR (SR)
WELL 02 POINT #2Entry Point to the Distribution System (EP)

WELL 06 - POPPY
Ground Water (GW)

WELL 06SR (SR)

WELL 07 - S HARTLEY
Ground Water (GW)

WELL 07SR (SR)

FAQ

Is City of Patterson tap water safe to drink?

When was City of Patterson last tested for water contamination?

The latest water samples were taken on December 11th, 2024.