CA Water Service - Los Altos Subdivision is a large public water system in EPA region 9 that provides tap water for the 94022, 94040, 94041, 94087, 95014 zip codes. It has 53 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 14.37 µg/L. The maximum reported level of Manganese was 9.6 µg/L. There were 2 contamintants found in the CA Water Service - Los Altos Subdivision water supply at levels that were above the minimum reporting level.
Well 15-1
Ground Water (GW)EP #804 - LAS-W-015-01-TREntry Point to the Distribution System (EP)
Well 17-1
Ground Water (GW)EP #805 - LAS-W-017-01-TREntry Point to the Distribution System (EP)
Well 18-2 (GWRMP)
Ground Water (GW)EP #806 - LAS-W-018-02-TREntry Point to the Distribution System (EP)
Well 27-1 (GWRMP)
Ground Water (GW)EP #809 - LAS-W-027-01-TREntry Point to the Distribution System (EP)
Well 34-1
Ground Water (GW)EP #810 - LAS-W-034-01-TREntry Point to the Distribution System (EP)
Well 39-1
Ground Water (GW)EP #811 - LAS-W-039-01Entry Point to the Distribution System (EP)
Well 104-2
Ground Water (GW)EP #812 - LAS-W-104-02Entry Point to the Distribution System (EP)
LAS-W-104-02Entry Point to the Distribution System (EP)
Well 119-3
Ground Water (GW)LAS-W-119-03Entry Point to the Distribution System (EP)
Well 121-2
Ground Water (GW)LAS-W-121-02Entry Point to the Distribution System (EP)
SCVWD Intertie
Surface Water (SW)EP #816 - LAS-C-FAREntry Point to the Distribution System (EP)
Well 25-01 (GWRMP)
Ground Water (GW)LAS-W-025-01Entry Point to the Distribution System (EP)
Well 06-02-EFF
Ground Water (GW)LAS-W-006-02-EFFEntry Point to the Distribution System (EP)
Well 21-01
Ground Water (GW)LAS-W-021-01Entry Point to the Distribution System (EP)
Well 116-1(GWRMP)
Ground Water (GW)LAS-W-116-01Entry Point to the Distribution System (EP)
Well 123-1
Ground Water (GW)LAS-W-123-01Entry Point to the Distribution System (EP)
SJWC Intertie
Surface Water (SW)LAS-C-WESTEntry Point to the Distribution System (EP)
Distribution System
Multiple Sources (MX)LAS-D-030Distribution System (DS)
Distribution System
Multiple Sources (MX)LAS-D-017Distribution System (DS)
Well 121-2, 119-03 LAS-D-023Maximum Residence Time (MR)
Well 115-1 LAS-D-022Maximum Residence Time (MR)
Well 104-2 LAS-D-012Maximum Residence Time (MR)
Well 39-1, 17-01 LAS-D-016Maximum Residence Time (MR)
Well 1 and 27-01 LAS-D-003Maximum Residence Time (MR)
Well 15-1 LAS-D-021Maximum Residence Time (MR)
Well 18-2 LAS-D-015Maximum Residence Time (MR)
Well 24-1 LAS-D-014Maximum Residence Time (MR)
Distribution System
Multiple Sources (MX)LAS-D-001Distribution System (DS)
Distribution System
Multiple Sources (MX)LAS-D-007Distribution System (DS)
Distribution System
Multiple Sources (MX)LAS-D-008Distribution System (DS)
Distribution System
Multiple Sources (MX)LAS-D-029Distribution System (DS)
Distribution System
Multiple Sources (MX)LAS-D-032Distribution System (DS)
Distribution System
Multiple Sources (MX)LAS-D-023Distribution System (DS)
Well 24-1
Ground Water (GW)EP #808: LAS-W-024-01Entry Point to the Distribution System (EP)
Well 115-1
Ground Water (GW)EP #813: LAS-W-115-01Entry Point to the Distribution System (EP)
LAS-W-115-01Entry Point to the Distribution System (EP)
EP- #800 WELL 001 - TREATED
Ground Water (GW)LAS-W-001-01Entry Point to the Distribution System (EP)
EP-#807 WELL 020-01 Treated
Ground Water (GW)LAS-W-020-01-TREntry Point to the Distribution System (EP)
EP-# Vallco Connection
Surface Water (SW)LAS-C-VALEntry Point to the Distribution System (EP)
WELL 001-01
Ground Water (GW)WELL 001-01 07S/02W-01B01SR (SR)
WELL 001-02
Ground Water (GW)WELL 001-02 07S/02W-01G05SR (SR)
WELL 004-01 - INACTIVE
Ground Water (GW)WELL 004-01 - INACT 06S/02W-28N02SR (SR)
WELL 004-02 - INACTIVE
Ground Water (GW)WELL 004-02 - INACT 06S/02W-28N01SR (SR)
WELL 015-01
Ground Water (GW)WELL 015-01 07S/02W-03P01SR (SR)
WELL 017-01
Ground Water (GW)WELL 017-01 06S/02W-34K02SR (SR)
WELL 018-02
Ground Water (GW)WELL 018-02 07S/02W-03H01SR (SR)
WELL 020-01
Ground Water (GW)WELL 020-01 07S/01W-06P01SR (SR)
WELL 024-01
Ground Water (GW)WELL 024-01 07S/02W-13C01SR (SR)
WELL 025-01 - INACTIVE
Ground Water (GW)WELL 025-01 - INACT 07S/02W-01H01SR (SR)
WELL 027-01
Ground Water (GW)WELL 027-01 07S/02W-01E03Entry Point to the Distribution System (EP)
WELL 029-01 - STANDBY
Ground Water (GW)WELL 029-01 - STAND 07S/01W-08K01SR (SR)
WELL 030-01
Ground Water (GW)WELL 030-01 07S/02W-01E02Entry Point to the Distribution System (EP)
WELL 031-01
Ground Water (GW)WELL 031-01 07S/02W-01L01SR (SR)
WELL 032-01
Ground Water (GW)WELL 032-01 07S/02W-03A02SR (SR)
WELL 034-01
Ground Water (GW)WELL 034-01 07S/01W-07N01SR (SR)
WELL 104-02
Ground Water (GW)WELL 104-02 06S/02W-32D01SR (SR)
WELL 115-01
Ground Water (GW)WELL 115-01 06S/02W-20N01SR (SR)
WELL 116-01
Ground Water (GW)WELL 116-01 06S/02W-29B02SR (SR)
WELL 119-03
Ground Water (GW)WELL 119-03 06S/02W-20L03SR (SR)
WELL 121-02
Ground Water (GW)WELL 121-02 06S/02W-19H02Entry Point to the Distribution System (EP)
WELL 123-01
Ground Water (GW)WELL 123-01 06S/02W-19M01SR (SR)
WELL 123-02
Ground Water (GW)WELL 123-02 06S/02W-19M10SR (SR)
WELL 039-01
Ground Water (GW)WELL 039-01 06S/02W-34G02SR (SR)
The latest water samples were taken on March 25th, 2025.