Public Water System: California Water Service - San Carlos

MyTapWater.org's tap water quality report is the compilation of data collected from federal, state, and local government agencies, most prominently the EPA. We strive to populate the report with the latest data concerning water contaminants, lead and copper levels, and water quality violations. We only collect drinking water data from public water systems.

PWS Service Information
PWS ID: CA4110007
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Surface water purchased
Population Served: 29,554
Contact Information
JAMES, SOPHIE
JAMES, SOPHIE
1720 NORTH FIRST STREET
SAN JOSE, CA 95112-4508

This public water system services 4 zip codes in 1 county.

Summary Results


A summary view of the the times a water contaminant was tested and found to exceed the level set by the EPA (the MCL).

Maximum Contaminant Levels Exceeded (by year):

2013   (0) 2014   (1) 2015   (1)
chlorate chlorate

Contaminant Detailed Results


This a view of violations of maximum contaminant levels. In the expanded view you can see each know test date for a given contaminant, the result of the test, the minimum level that can be recognized in a test (MRL), and upper limit that is considered healthy (HRL).

chlorate
Is this in your home's pipes?

Year Test Date MRL HRL Test Result
2015 2015-08-20 20 210 210
2015 2015-08-20 20 210 200
2015 2015-05-05 20 210 160
2015 2015-05-05 20 210 170
2015 2015-02-03 20 210 110
2015 2015-02-03 20 210 110
2014 2014-11-03 20 210 200
2014 2014-11-03 20 210 210

Other Water Contaminants Tested


The following contaminants were tested and within national EPA guidelines.

The last mile of pipe makes a big difference, learn more about testing your water.

Contaminant MRL HRL Avg Result
PFNA 0.02 0 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.02 0 < 0.02
2015 2015-05-05 0.02 0 < 0.02
2015 2015-02-03 0.02 0 < 0.02
2014 2014-11-03 0.02 0 < 0.02
PFOS 0.04 0.07 < 0.04 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.04 0.07 < 0.04
2015 2015-05-05 0.04 0.07 < 0.04
2015 2015-02-03 0.04 0.07 < 0.04
2014 2014-11-03 0.04 0.07 < 0.04
PFOA 0.02 0.07 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.02 0.07 < 0.02
2015 2015-05-05 0.02 0.07 < 0.02
2015 2015-02-03 0.02 0.07 < 0.02
2014 2014-11-03 0.02 0.07 < 0.02
chromium 0.2 100 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.2 100 < 0.2
2015 2015-08-20 0.2 100 < 0.2
2015 2015-06-09 0.2 100 < 0.2
2015 2015-05-05 0.2 100 < 0.2
2015 2015-05-05 0.2 100 < 0.2
2015 2015-02-03 0.2 100 < 0.2
2015 2015-02-03 0.2 100 < 0.2
2014 2014-12-12 0.2 100 < 0.2
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 1 70 < 1
2015 2015-08-20 1 70 < 1
2015 2015-06-09 1 70 < 1
2015 2015-05-05 1 70 < 1
2015 2015-05-05 1 70 < 1
2015 2015-02-03 1 70 < 1
2015 2015-02-03 1 70 < 1
2014 2014-12-12 1 70 < 1
molybdenum 1 40 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 1 40 < 1
2015 2015-08-20 1 40 < 1
2015 2015-06-09 1 40 < 1
2015 2015-05-05 1 40 < 1
2015 2015-05-05 1 40 < 1
2015 2015-02-03 1 40 < 1
2015 2015-02-03 1 40 < 1
2014 2014-12-12 1 40 < 1
chromium-6 0.03 0 0.034 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.03 0 0.03
2015 2015-08-20 0.03 0 < 0.03
2015 2015-05-05 0.03 0 < 0.03
2015 2015-05-05 0.03 0 < 0.03
2015 2015-02-03 0.03 0 0.11
2015 2015-02-03 0.03 0 0.1
2014 2014-11-03 0.03 0 < 0.03
2014 2014-11-03 0.03 0 0.032
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.09 0 < 0.09
2015 2015-05-05 0.09 0 < 0.09
2015 2015-02-03 0.09 0 < 0.09
2014 2014-11-03 0.09 0 < 0.09
strontium 0.3 1500 93.75 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.3 1500 17
2015 2015-08-20 0.3 1500 16
2015 2015-06-09 0.3 1500 17
2015 2015-05-05 0.3 1500 16
2015 2015-05-05 0.3 1500 15
2015 2015-02-03 0.3 1500 320
2015 2015-02-03 0.3 1500 330
2014 2014-12-12 0.3 1500 19
PFHpA 0.01 0 < 0.01 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.01 0 < 0.01
2015 2015-05-05 0.01 0 < 0.01
2015 2015-02-03 0.01 0 < 0.01
2014 2014-11-03 0.01 0 < 0.01
vanadium 0.2 21 0.1825 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.2 21 < 0.2
2015 2015-08-20 0.2 21 < 0.2
2015 2015-06-09 0.2 21 < 0.2
2015 2015-05-05 0.2 21 < 0.2
2015 2015-05-05 0.2 21 < 0.2
2015 2015-02-03 0.2 21 0.66
2015 2015-02-03 0.2 21 0.6
2014 2014-12-12 0.2 21 0.2
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.03 6.14 < 0.03
2015 2015-05-05 0.03 6.14 < 0.03
2015 2015-02-03 0.03 6.14 < 0.03
2014 2014-11-03 0.03 6.14 < 0.03
HCFC-22 0.08 0 < 0.08 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.08 0 < 0.08
2015 2015-05-05 0.08 0 < 0.08
2015 2015-02-03 0.08 0 < 0.08
2014 2014-11-03 0.08 0 < 0.08
Halon 1011 0.06 90 < 0.06 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.06 90 < 0.06
2015 2015-05-05 0.06 90 < 0.06
2015 2015-02-03 0.06 90 < 0.06
2014 2014-11-03 0.06 90 < 0.06
1,2,3-trichloropropane 0.03 0.0004 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.03 0.0004 < 0.03
2015 2015-05-05 0.03 0.0004 < 0.03
2015 2015-02-03 0.03 0.0004 < 0.03
2014 2014-11-03 0.03 0.0004 < 0.03
bromomethane 0.2 140 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.2 140 < 0.2
2015 2015-05-05 0.2 140 < 0.2
2015 2015-02-03 0.2 140 < 0.2
2014 2014-11-03 0.2 140 < 0.2
chloromethane 0.2 2.69 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.2 2.69 < 0.2
2015 2015-05-05 0.2 2.69 < 0.2
2015 2015-02-03 0.2 2.69 < 0.2
2014 2014-11-03 0.2 2.69 < 0.2
1,4-dioxane 0.07 0.35 < 0.07 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.07 0.35 < 0.07
2015 2015-05-05 0.07 0.35 < 0.07
2015 2015-02-03 0.07 0.35 < 0.07
2014 2014-11-03 0.07 0.35 < 0.07
PFHxS 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.03 0 < 0.03
2015 2015-05-05 0.03 0 < 0.03
2015 2015-02-03 0.03 0 < 0.03
2014 2014-11-03 0.03 0 < 0.03
1,3-butadiene 0.1 0.0103 < 0.1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-08-20 0.1 0.0103 < 0.1
2015 2015-05-05 0.1 0.0103 < 0.1
2015 2015-02-03 0.1 0.0103 < 0.1
2014 2014-11-03 0.1 0.0103 < 0.1

Lead and Copper Data


Lead and copper are recorded separately from other contaminants because of the Lead and Copper Rule. As with all other results, these are the findings at the water supply. Lead and copper can be — and often are — added to drinking water in between the water facility and a tap.

Sample ID Contaminant Sampling Start Date Sampling End Date Result
CA49213 lead 2014-01-01 2016-12-31 0mg/L
CA38875 lead 2013-01-01 2015-12-31 0mg/L
411000710237L1ST 6 lead 2010-01-01 2010-12-31 0.0042mg/L
411000710237LA2 lead 2010-01-01 2010-12-31 0.005mg/L
411000710252L2ND 6 lead 2010-01-01 2010-12-31 0.019mg/L
411000710256LT2 lead 2010-01-01 2010-12-31 0.0025mg/L
411000710272L1ST 6 lead 2010-01-01 2010-12-31 0.024mg/L
411000709272L lead 2009-01-01 2009-12-31 0.007mg/L
411000709272LT3 lead 2009-01-01 2009-12-31 0.007mg/L

Violations


Known violations of the Safe Drinking Water Act as recorded by the EPA.

Compliance Dates Rule Violation Type Contaminant Name Status
2015-03-01 - 2015-03-31 Surface Water Treatment Rule Treatment Technique (SWTR and GWR) Surface Water Treatment Rule Returned to Compliance
1996-06-01 - 1996-06-30 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Known
1995-12-01 - 1995-12-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Known
1993-06-01 - 1993-06-30 Surface Water Treatment Rule Treatment Technique (SWTR and GWR) Surface Water Treatment Rule Returned to Compliance

What My Water Data Means


Water data isn't always easy to interpret, but by following the links on this page you should be able to have most of your questions answered. By clicking the name of a water contaminant or secondary substance you can learn about that specific substance. Ultimately this page should give you some insight towards learning if your water is safe, what water filter you should buy (if any), and how well your local water compares against other sources.

Sources


The origin of MyTapWater.org's water data is explained on our Data Sources page.

Why Is My Water Data Not More Recent?


The recency of the data for your ZIP code depends on the last your water source was tested, by a federal, state, or local agency. More information about the timing can be determined by learning about the dataset in question and seeing how often the EPA (other another governing body) mandated testing.