Town Of Discovery Bay Water System

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: CA0710009
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Ground water
Population Served: 13,500 		Contact Information
DAVIES, MIKE
DAVIES, MIKE
1800 Willow Lake Road
DISCOVERY BAY, CA 94505-9376
[email protected]

This public water system services 1 municipality in 1 county.

Summary Results

A summary view of tests in which a water contaminant found to exceed the Maximum Contaminant Level (MCL) set by the EPA.

Maximum Contaminant Levels Exceeded (by year):

2013   (1) 2014   (0) 2015   (0) 2016   (0) 2017   (0) 2018   (0)
chlorate

Contaminant Detailed Results

This a view of violations of maximum contaminant levels. Use the expanded view see result data for a drinking water contaminant, the minimum level that can be recognized in a test (MRL), and upper limit that is considered healthy (HRL).

chlorate

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2014 2014-04-17 20 210 120
2014 2014-04-17 20 210 170
2014 2014-04-17 20 210 130
2014 2014-04-17 20 210 170
2013 2013-10-28 20 210 150
2013 2013-10-28 20 210 310
2013 2013-10-28 20 210 160
2013 2013-10-28 20 210 360

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Other Water Contaminants Tested

The following contaminants were tested and found to be within national EPA guidelines.

Contaminant MRLMinimum Reporting Level HRLHealth Risk Limit Avg Result
chromium 0.2 100 0.0263 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.2 100 < 0.2
2014 2014-04-17 0.2 100 0.21
2014 2014-04-17 0.2 100 < 0.2
2014 2014-04-17 0.2 100 < 0.2
2013 2013-10-28 0.2 100 < 0.2
2013 2013-10-28 0.2 100 < 0.2
2013 2013-10-28 0.2 100 < 0.2
2013 2013-10-28 0.2 100 < 0.2
[+] Expand Test Data
chromium-6 0.03 0 0.0044 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.03 0 < 0.03
2014 2014-04-17 0.03 0 < 0.03
2014 2014-04-17 0.03 0 < 0.03
2014 2014-04-17 0.03 0 < 0.03
2013 2013-10-28 0.03 0 < 0.03
2013 2013-10-28 0.03 0 < 0.03
2013 2013-10-28 0.03 0 < 0.03
2013 2013-10-28 0.03 0 0.035
[+] Expand Test Data
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 1 70 < 1
2014 2014-04-17 1 70 < 1
2014 2014-04-17 1 70 < 1
2014 2014-04-17 1 70 < 1
2013 2013-10-28 1 70 < 1
2013 2013-10-28 1 70 < 1
2013 2013-10-28 1 70 < 1
2013 2013-10-28 1 70 < 1
[+] Expand Test Data
molybdenum 1 40 3.45 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 1 40 3.4
2014 2014-04-17 1 40 3.7
2014 2014-04-17 1 40 3.2
2014 2014-04-17 1 40 4
2013 2013-10-28 1 40 3.8
2013 2013-10-28 1 40 2.9
2013 2013-10-28 1 40 3.8
2013 2013-10-28 1 40 2.8
[+] Expand Test Data
strontium 0.3 1500 720 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.3 1500 820
2014 2014-04-17 0.3 1500 660
2014 2014-04-17 0.3 1500 790
2014 2014-04-17 0.3 1500 700
2013 2013-10-28 0.3 1500 830
2013 2013-10-28 0.3 1500 580
2013 2013-10-28 0.3 1500 840
2013 2013-10-28 0.3 1500 540
[+] Expand Test Data
vanadium 0.2 21 0.0338 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.2 21 < 0.2
2014 2014-04-17 0.2 21 < 0.2
2014 2014-04-17 0.2 21 < 0.2
2014 2014-04-17 0.2 21 < 0.2
2013 2013-10-28 0.2 21 < 0.2
2013 2013-10-28 0.2 21 0.27
2013 2013-10-28 0.2 21 < 0.2
2013 2013-10-28 0.2 21 < 0.2
[+] Expand Test Data
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.03 6.14 < 0.03
2014 2014-04-17 0.03 6.14 < 0.03
2013 2013-10-28 0.03 6.14 < 0.03
2013 2013-10-28 0.03 6.14 < 0.03
[+] Expand Test Data
1,2,3-trichloropropane 0.03 0.0004 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.03 0.0004 < 0.03
2014 2014-04-17 0.03 0.0004 < 0.03
2013 2013-10-28 0.03 0.0004 < 0.03
2013 2013-10-28 0.03 0.0004 < 0.03
[+] Expand Test Data
1,3-butadiene 0.1 0.0103 < 0.1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.1 0.0103 < 0.1
2014 2014-04-17 0.1 0.0103 < 0.1
2013 2013-10-28 0.1 0.0103 < 0.1
2013 2013-10-28 0.1 0.0103 < 0.1
[+] Expand Test Data
1,4-dioxane 0.07 0.35 < 0.07 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.07 0.35 < 0.07
2014 2014-04-17 0.07 0.35 < 0.07
2013 2013-10-28 0.07 0.35 < 0.07
2013 2013-10-28 0.07 0.35 < 0.07
[+] Expand Test Data
bromomethane 0.2 140 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.2 140 < 0.2
2014 2014-04-17 0.2 140 < 0.2
2013 2013-10-28 0.2 140 < 0.2
2013 2013-10-28 0.2 140 < 0.2
[+] Expand Test Data
chloromethane 0.2 2.69 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.2 2.69 < 0.2
2014 2014-04-17 0.2 2.69 < 0.2
2013 2013-10-28 0.2 2.69 < 0.2
2013 2013-10-28 0.2 2.69 < 0.2
[+] Expand Test Data
Halon 1011 0.06 90 < 0.06 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.06 90 < 0.06
2014 2014-04-17 0.06 90 < 0.06
2013 2013-10-28 0.06 90 < 0.06
2013 2013-10-28 0.06 90 < 0.06
[+] Expand Test Data
HCFC-22 0.08 0 < 0.08 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.08 0 < 0.08
2014 2014-04-17 0.08 0 < 0.08
2013 2013-10-28 0.08 0 < 0.08
2013 2013-10-28 0.08 0 < 0.08
[+] Expand Test Data
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.09 0 < 0.09
2014 2014-04-17 0.09 0 < 0.09
2013 2013-10-28 0.09 0 < 0.09
2013 2013-10-28 0.09 0 < 0.09
[+] Expand Test Data
PFHpA 0.01 0 < 0.01 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.01 0 < 0.01
2014 2014-04-17 0.01 0 < 0.01
2013 2013-10-28 0.01 0 < 0.01
2013 2013-10-28 0.01 0 < 0.01
[+] Expand Test Data
PFHxS 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.03 0 < 0.03
2014 2014-04-17 0.03 0 < 0.03
2013 2013-10-28 0.03 0 < 0.03
2013 2013-10-28 0.03 0 < 0.03
[+] Expand Test Data
PFNA 0.02 0 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.02 0 < 0.02
2014 2014-04-17 0.02 0 < 0.02
2013 2013-10-28 0.02 0 < 0.02
2013 2013-10-28 0.02 0 < 0.02
[+] Expand Test Data
PFOA 0.02 0.07 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.02 0.07 < 0.02
2014 2014-04-17 0.02 0.07 < 0.02
2013 2013-10-28 0.02 0.07 < 0.02
2013 2013-10-28 0.02 0.07 < 0.02
[+] Expand Test Data
PFOS 0.04 0.07 < 0.04 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-17 0.04 0.07 < 0.04
2014 2014-04-17 0.04 0.07 < 0.04
2013 2013-10-28 0.04 0.07 < 0.04
2013 2013-10-28 0.04 0.07 < 0.04
[+] Expand Test Data

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 level. Lead and copper can be — and often are — deposited in drinking water in between the water facility and your tap.

Sample ID Contaminant Sampling Start Date Sampling End Date Result
CA62799 lead 2016-01-01 2018-12-31 0.0038mg/L
CA52316 lead 2013-01-01 2015-12-31 0.0021mg/L
CA37400 lead 2010-01-01 2012-12-31 0.0025mg/L
071000909299LT1 lead 2009-01-01 2009-12-31 0.0025mg/L

Violations

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

Compliance Dates Rule Violation Type Contaminant Name Status
- N/A Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Known
- N/A Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Known
- N/A Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Known

Local Water Testing

Find a lab in your area so you can get your tap or well water tested. This list contains both governmental and private labs, all of which are EPA-certified for drinking water testing.

Lab Location Zip Code
AEMTEK, Inc Fremont, CA 94539
Napa -Solano-Yolo-Marin County Public Health Laboratory Fairfield, CA 94533
Caltest Analytical Laboratory Napa, CA 94558

Water Bill Information

Convenient information about your water service.

Unable to identify any billing information about Town Of Discovery Bay (CA0710009).

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.