Public Water System: Napa, City Of

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: CA2810003
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Surface water
Population Served: 86,051
Contact Information
KEBBAS, ERIN
KEBBAS, ERIN
P.O. BOX 660
NAPA, CA 94559

This public water system services 6 zip codes in 1 municipality 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   (1) 2014   (0) 2015   (0)
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
2013 2013-10-03 20 210 320
2013 2013-10-03 20 210 370
2013 2013-10-03 20 210 220
2013 2013-10-03 20 210 400
2013 2013-07-10 20 210 260
2013 2013-07-10 20 210 220
2013 2013-07-10 20 210 190
2013 2013-07-10 20 210 130
2013 2013-04-03 20 210 170
2013 2013-04-03 20 210 220
2013 2013-01-09 20 210 147
2013 2013-01-09 20 210 93.9

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
molybdenum 1 40 0.2833 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 1 40 < 1
2013 2013-10-03 1 40 < 1
2013 2013-10-03 1 40 1
2013 2013-10-03 1 40 < 1
2013 2013-07-10 1 40 < 1
2013 2013-07-10 1 40 < 1
2013 2013-07-10 1 40 < 1
2013 2013-07-10 1 40 < 1
2013 2013-06-05 1 40 < 1
2013 2013-06-05 1 40 < 1
2013 2013-02-27 1 40 1.1
2013 2013-02-06 1 40 1.3
Halon 1011 0.06 90 < 0.06 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.06 90 < 0.06
2013 2013-10-03 0.06 90 < 0.06
2013 2013-07-10 0.06 90 < 0.06
2013 2013-07-10 0.06 90 < 0.06
2013 2013-04-03 0.06 90 < 0.06
2013 2013-01-09 0.06 90 < 0.06
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 1 70 < 1
2013 2013-10-03 1 70 < 1
2013 2013-10-03 1 70 < 1
2013 2013-10-03 1 70 < 1
2013 2013-07-10 1 70 < 1
2013 2013-07-10 1 70 < 1
2013 2013-07-10 1 70 < 1
2013 2013-07-10 1 70 < 1
2013 2013-06-05 1 70 < 1
2013 2013-06-05 1 70 < 1
2013 2013-02-27 1 70 < 1
2013 2013-02-06 1 70 < 1
chromium 0.2 100 0.0217 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.2 100 < 0.2
2013 2013-10-03 0.2 100 < 0.2
2013 2013-10-03 0.2 100 < 0.2
2013 2013-10-03 0.2 100 < 0.2
2013 2013-07-10 0.2 100 < 0.2
2013 2013-07-10 0.2 100 < 0.2
2013 2013-07-10 0.2 100 < 0.2
2013 2013-07-10 0.2 100 < 0.2
2013 2013-06-05 0.2 100 < 0.2
2013 2013-06-05 0.2 100 0.26
2013 2013-02-27 0.2 100 < 0.2
2013 2013-02-06 0.2 100 < 0.2
chromium-6 0.03 0 0.1078 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.03 0 0.083
2013 2013-10-03 0.03 0 0.087
2013 2013-10-03 0.03 0 0.053
2013 2013-10-03 0.03 0 0.072
2013 2013-07-10 0.03 0 0.08
2013 2013-07-10 0.03 0 0.097
2013 2013-07-10 0.03 0 0.092
2013 2013-07-10 0.03 0 0.13
2013 2013-04-03 0.03 0 0.23
2013 2013-04-03 0.03 0 0.17
2013 2013-01-09 0.03 0 0.13
2013 2013-01-09 0.03 0 0.07
vanadium 0.2 21 1.9492 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.2 21 1.3
2013 2013-10-03 0.2 21 2
2013 2013-10-03 0.2 21 3
2013 2013-10-03 0.2 21 1.2
2013 2013-07-10 0.2 21 0.73
2013 2013-07-10 0.2 21 1.8
2013 2013-07-10 0.2 21 2.5
2013 2013-07-10 0.2 21 3.4
2013 2013-06-05 0.2 21 0.66
2013 2013-06-05 0.2 21 3.8
2013 2013-02-27 0.2 21 1.2
2013 2013-02-06 0.2 21 1.8
1,4-dioxane 0.07 0.35 < 0.07 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.07 0.35 < 0.07
2013 2013-10-03 0.07 0.35 < 0.07
2013 2013-07-10 0.07 0.35 < 0.07
2013 2013-07-10 0.07 0.35 < 0.07
2013 2013-04-03 0.07 0.35 < 0.07
2013 2013-02-25 0.07 0.35 < 0.07
strontium 0.3 1500 147.3333 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.3 1500 160
2013 2013-10-03 0.3 1500 150
2013 2013-10-03 0.3 1500 140
2013 2013-10-03 0.3 1500 160
2013 2013-07-10 0.3 1500 150
2013 2013-07-10 0.3 1500 150
2013 2013-07-10 0.3 1500 150
2013 2013-07-10 0.3 1500 98
2013 2013-06-05 0.3 1500 140
2013 2013-06-05 0.3 1500 140
2013 2013-02-27 0.3 1500 160
2013 2013-02-06 0.3 1500 170
chloromethane 0.2 2.69 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.2 2.69 < 0.2
2013 2013-10-03 0.2 2.69 < 0.2
2013 2013-07-10 0.2 2.69 < 0.2
2013 2013-07-10 0.2 2.69 < 0.2
2013 2013-04-03 0.2 2.69 < 0.2
2013 2013-01-09 0.2 2.69 < 0.2
PFOS 0.04 0.07 < 0.04 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.04 0.07 < 0.04
2013 2013-10-03 0.04 0.07 < 0.04
2013 2013-07-10 0.04 0.07 < 0.04
2013 2013-04-03 0.04 0.07 < 0.04
2013 2013-02-25 0.04 0.07 < 0.04
PFOA 0.02 0.07 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.02 0.07 < 0.02
2013 2013-10-03 0.02 0.07 < 0.02
2013 2013-07-10 0.02 0.07 < 0.02
2013 2013-04-03 0.02 0.07 < 0.02
2013 2013-02-25 0.02 0.07 < 0.02
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.03 6.14 < 0.03
2013 2013-10-03 0.03 6.14 < 0.03
2013 2013-07-10 0.03 6.14 < 0.03
2013 2013-07-10 0.03 6.14 < 0.03
2013 2013-04-03 0.03 6.14 < 0.03
2013 2013-01-09 0.03 6.14 < 0.03
1,3-butadiene 0.1 0.0103 < 0.1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.1 0.0103 < 0.1
2013 2013-10-03 0.1 0.0103 < 0.1
2013 2013-07-10 0.1 0.0103 < 0.1
2013 2013-07-10 0.1 0.0103 < 0.1
2013 2013-04-03 0.1 0.0103 < 0.1
2013 2013-01-09 0.1 0.0103 < 0.1
bromomethane 0.2 140 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.2 140 < 0.2
2013 2013-10-03 0.2 140 < 0.2
2013 2013-07-10 0.2 140 < 0.2
2013 2013-07-10 0.2 140 < 0.2
2013 2013-04-03 0.2 140 < 0.2
2013 2013-01-09 0.2 140 < 0.2
1,2,3-trichloropropane 0.03 0.0004 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.03 0.0004 < 0.03
2013 2013-10-03 0.03 0.0004 < 0.03
2013 2013-07-10 0.03 0.0004 < 0.03
2013 2013-07-10 0.03 0.0004 < 0.03
2013 2013-04-03 0.03 0.0004 < 0.03
2013 2013-01-09 0.03 0.0004 < 0.03
PFNA 0.02 0 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.02 0 < 0.02
2013 2013-10-03 0.02 0 < 0.02
2013 2013-07-10 0.02 0 < 0.02
2013 2013-04-03 0.02 0 < 0.02
2013 2013-02-25 0.02 0 < 0.02
PFHxS 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.03 0 < 0.03
2013 2013-10-03 0.03 0 < 0.03
2013 2013-07-10 0.03 0 < 0.03
2013 2013-04-03 0.03 0 < 0.03
2013 2013-02-25 0.03 0 < 0.03
PFHpA 0.01 0 < 0.01 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.01 0 < 0.01
2013 2013-10-03 0.01 0 < 0.01
2013 2013-07-10 0.01 0 < 0.01
2013 2013-04-03 0.01 0 < 0.01
2013 2013-02-25 0.01 0 < 0.01
HCFC-22 0.08 0 < 0.08 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.08 0 < 0.08
2013 2013-10-03 0.08 0 < 0.08
2013 2013-07-10 0.08 0 < 0.08
2013 2013-07-10 0.08 0 < 0.08
2013 2013-04-03 0.08 0 < 0.08
2013 2013-01-09 0.08 0 < 0.08
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-03 0.09 0 < 0.09
2013 2013-10-03 0.09 0 < 0.09
2013 2013-07-10 0.09 0 < 0.09
2013 2013-04-03 0.09 0 < 0.09
2013 2013-02-25 0.09 0 < 0.09

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
CA48846 lead 2013-01-01 2015-12-31 0mg/L
CA36720 lead 2010-01-01 2012-12-31 0mg/L
281000309201L lead 2009-01-01 2009-12-31 0.0032mg/L

Violations


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

Compliance Dates Rule Violation Type Contaminant Name Status
2016-01-01 - 2016-03-31 Stage 2 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM Returned to Compliance
2015-10-01 - 2015-12-31 Stage 2 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM Returned to Compliance
2015-07-01 - 2015-09-30 Stage 2 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM Returned to Compliance
2015-04-01 - 2015-06-30 Stage 2 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM Returned to Compliance
2015-01-01 - 2015-03-31 Stage 2 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM Returned to Compliance
1995-04-01 - 1995-04-30 Surface Water Treatment Rule Treatment Technique (SWTR and GWR) Surface Water Treatment Rule Returned to Compliance
1988-08-01 - 1988-08-31 Miscellaneous Notification, Public - Known
1988-07-01 - 1988-07-31 Miscellaneous Notification, Public - Known

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.