Walnut Valley Water District 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: CA1910234
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Surface water purchased
Population Served: 103,340 		Contact Information
HOLMES, MICHAEL
HOLMES, MICHAEL
271 S. BREA CANYON ROAD
WALNUT, CA 91789
[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):

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).

HAA5

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-07 0 0.00 13.2

HAA6Br

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-07 0 0.00 18.6

HAA9

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-07 0 0.00 26.5

1-butanol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 2 0.00 < 2
2018 2018-06-13 2 0.00 < 2
2018 2018-03-07 2 0.00 < 2
2018 2018-03-07 2 0.00 < 2

2-methoxyethanol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.4 0.00 < 0.4
2018 2018-06-13 0.4 0.00 < 0.4
2018 2018-03-07 0.4 0.00 < 0.4
2018 2018-03-07 0.4 0.00 < 0.4

2-propen-1-ol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.5 0.00 < 0.5
2018 2018-06-13 0.5 0.00 < 0.5
2018 2018-03-07 0.5 0.00 < 0.5
2018 2018-03-07 0.5 0.00 < 0.5

alpha-hexachlorocyclohexane

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.01 0.00 < 0.01
2018 2018-06-13 0.01 0.00 < 0.01
2018 2018-03-07 0.01 0.00 < 0.01
2018 2018-03-07 0.01 0.00 < 0.01

butylated hydroxyanisole

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.03 0.00 < 0.03
2018 2018-06-13 0.03 0.00 < 0.03
2018 2018-03-07 0.03 0.00 < 0.03
2018 2018-03-07 0.03 0.00 < 0.03

chlorpyrifos

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.03 0.00 < 0.03
2018 2018-06-13 0.03 0.00 < 0.03
2018 2018-03-07 0.03 0.00 < 0.03
2018 2018-03-07 0.03 0.00 < 0.03

dimethipin

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.2 0.00 < 0.2
2018 2018-06-13 0.2 0.00 < 0.2
2018 2018-03-07 0.2 0.00 < 0.2
2018 2018-03-07 0.2 0.00 < 0.2

ethoprop

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.03 0.00 < 0.03
2018 2018-06-13 0.03 0.00 < 0.03
2018 2018-03-07 0.03 0.00 < 0.03
2018 2018-03-07 0.03 0.00 < 0.03

germanium

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.3 0.00 < 0.3
2018 2018-06-13 0.3 0.00 < 0.3
2018 2018-03-07 0.3 0.00 < 0.3
2018 2018-03-07 0.3 0.00 < 0.3

manganese

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.4 0.00 1.1
2018 2018-06-13 0.4 0.00 2.8
2018 2018-03-07 0.4 0.00 2.4
2018 2018-03-07 0.4 0.00 2.6

o-toluidine

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.007 0.00 < 0.007
2018 2018-06-13 0.007 0.00 < 0.007
2018 2018-03-07 0.007 0.00 < 0.007
2018 2018-03-07 0.007 0.00 < 0.007

oxyfluorfen

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.05 0.00 < 0.05
2018 2018-06-13 0.05 0.00 < 0.05
2018 2018-03-07 0.05 0.00 < 0.05
2018 2018-03-07 0.05 0.00 < 0.05

profenofos

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.3 0.00 < 0.3
2018 2018-06-13 0.3 0.00 < 0.3
2018 2018-03-07 0.3 0.00 < 0.3
2018 2018-03-07 0.3 0.00 < 0.3

quinoline

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.02 0.00 < 0.02
2018 2018-06-13 0.02 0.00 < 0.02
2018 2018-03-07 0.02 0.00 < 0.02
2018 2018-03-07 0.02 0.00 < 0.02

tebuconazole

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.2 0.00 < 0.2
2018 2018-06-13 0.2 0.00 < 0.2
2018 2018-03-07 0.2 0.00 < 0.2
2018 2018-03-07 0.2 0.00 < 0.2

total permethrin

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.04 0.00 < 0.04
2018 2018-06-13 0.04 0.00 < 0.04
2018 2018-03-07 0.04 0.00 < 0.04
2018 2018-03-07 0.04 0.00 < 0.04

tribufos

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-13 0.07 0.00 < 0.07
2018 2018-06-13 0.07 0.00 < 0.07
2018 2018-03-07 0.07 0.00 < 0.07
2018 2018-03-07 0.07 0.00 < 0.07

Water Test And Filter Picks

Tip: Test your water at least once a year.


TapScore Water Test
A professional water test with including shipping to the lab.
Buy It Now

Aquasana 3-Stage Filter
Under-The-Sink System
Buy It Now

Faucet-Mounted Filter
A simple filter system for under $30
Buy It Now

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
chlorate 20 210 36.5 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 20 210 67
2014 2014-08-13 20 210 < 20
2014 2014-08-13 20 210 74
2014 2014-05-14 20 210 51
2014 2014-05-14 20 210 < 20
2014 2014-05-14 20 210 49
2014 2014-02-12 20 210 46
2014 2014-02-12 20 210 < 20
2014 2014-02-12 20 210 49
2013 2013-11-18 20 210 50
2013 2013-11-18 20 210 < 20
2013 2013-11-18 20 210 52
[+] Expand Test Data
chromium 0.2 100 0.1633 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.2 100 < 0.2
2014 2014-08-13 0.2 100 0.38
2014 2014-08-13 0.2 100 < 0.2
2014 2014-05-14 0.2 100 < 0.2
2014 2014-05-14 0.2 100 0.55
2014 2014-05-14 0.2 100 < 0.2
2014 2014-02-12 0.2 100 < 0.2
2014 2014-02-12 0.2 100 0.66
2014 2014-02-12 0.2 100 < 0.2
2013 2013-11-18 0.2 100 < 0.2
2013 2013-11-18 0.2 100 0.37
2013 2013-11-18 0.2 100 < 0.2
[+] Expand Test Data
chromium-6 0.03 0 0.2207 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.03 0 0.089
2014 2014-08-13 0.03 0 0.42
2014 2014-08-13 0.03 0 0.032
2014 2014-05-14 0.03 0 0.099
2014 2014-05-14 0.03 0 0.54
2014 2014-05-14 0.03 0 0.033
2014 2014-02-12 0.03 0 0.042
2014 2014-02-12 0.03 0 0.66
2014 2014-02-12 0.03 0 < 0.03
2013 2013-11-18 0.03 0 0.19
2013 2013-11-18 0.03 0 0.45
2013 2013-11-18 0.03 0 0.093
[+] Expand Test Data
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 1 70 < 1
2014 2014-08-13 1 70 < 1
2014 2014-08-13 1 70 < 1
2014 2014-05-14 1 70 < 1
2014 2014-05-14 1 70 < 1
2014 2014-05-14 1 70 < 1
2014 2014-02-12 1 70 < 1
2014 2014-02-12 1 70 < 1
2014 2014-02-12 1 70 < 1
2013 2013-11-18 1 70 < 1
2013 2013-11-18 1 70 < 1
2013 2013-11-18 1 70 < 1
[+] Expand Test Data
molybdenum 1 40 4.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 1 40 4.6
2014 2014-08-13 1 40 5.1
2014 2014-08-13 1 40 4.7
2014 2014-05-14 1 40 4.3
2014 2014-05-14 1 40 4.1
2014 2014-05-14 1 40 4.6
2014 2014-02-12 1 40 4.6
2014 2014-02-12 1 40 3.8
2014 2014-02-12 1 40 4.4
2013 2013-11-18 1 40 4
2013 2013-11-18 1 40 2
2013 2013-11-18 1 40 4.2
[+] Expand Test Data
strontium 0.3 1500 711.6667 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.3 1500 980
2014 2014-08-13 0.3 1500 350
2014 2014-08-13 0.3 1500 1100
2014 2014-05-14 0.3 1500 910
2014 2014-05-14 0.3 1500 300
2014 2014-05-14 0.3 1500 1000
2014 2014-02-12 0.3 1500 1100
2014 2014-02-12 0.3 1500 290
2014 2014-02-12 0.3 1500 1000
2013 2013-11-18 0.3 1500 620
2013 2013-11-18 0.3 1500 170
2013 2013-11-18 0.3 1500 720
[+] Expand Test Data
vanadium 0.2 21 2.9583 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.2 21 3.1
2014 2014-08-13 0.2 21 4.4
2014 2014-08-13 0.2 21 2.9
2014 2014-05-14 0.2 21 2.6
2014 2014-05-14 0.2 21 3.6
2014 2014-05-14 0.2 21 2.4
2014 2014-02-12 0.2 21 2.3
2014 2014-02-12 0.2 21 3.3
2014 2014-02-12 0.2 21 2.2
2013 2013-11-18 0.2 21 2.7
2013 2013-11-18 0.2 21 3.4
2013 2013-11-18 0.2 21 2.6
[+] Expand Test Data
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.03 6.14 < 0.03
2014 2014-08-13 0.03 6.14 < 0.03
2014 2014-05-14 0.03 6.14 < 0.03
2014 2014-05-14 0.03 6.14 < 0.03
2014 2014-02-12 0.03 6.14 < 0.03
2014 2014-02-12 0.03 6.14 < 0.03
2013 2013-11-18 0.03 6.14 < 0.03
2013 2013-11-18 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 2014-08-13 0.03 0.0004 < 0.03
2014 2014-08-13 0.03 0.0004 < 0.03
2014 2014-05-14 0.03 0.0004 < 0.03
2014 2014-05-14 0.03 0.0004 < 0.03
2014 2014-02-12 0.03 0.0004 < 0.03
2014 2014-02-12 0.03 0.0004 < 0.03
2013 2013-11-18 0.03 0.0004 < 0.03
2013 2013-11-18 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 2014-08-13 0.1 0.0103 < 0.1
2014 2014-08-13 0.1 0.0103 < 0.1
2014 2014-05-14 0.1 0.0103 < 0.1
2014 2014-05-14 0.1 0.0103 < 0.1
2014 2014-02-12 0.1 0.0103 < 0.1
2014 2014-02-12 0.1 0.0103 < 0.1
2013 2013-11-18 0.1 0.0103 < 0.1
2013 2013-11-18 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 2014-08-13 0.07 0.35 < 0.07
2014 2014-08-13 0.07 0.35 < 0.07
2014 2014-05-14 0.07 0.35 < 0.07
2014 2014-05-14 0.07 0.35 < 0.07
2014 2014-02-12 0.07 0.35 < 0.07
2014 2014-02-12 0.07 0.35 < 0.07
2013 2013-11-18 0.07 0.35 < 0.07
2013 2013-11-18 0.07 0.35 < 0.07
[+] Expand Test Data
17-alpha-ethynylestradiol 0.0009 0.035 < 0.0009 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.0009 0.035 < 0.0009
2014 2014-08-13 0.0009 0.035 < 0.0009
2014 2014-05-14 0.0009 0.035 < 0.0009
2014 2014-05-14 0.0009 0.035 < 0.0009
2014 2014-02-12 0.0009 0.035 < 0.0009
2014 2014-02-12 0.0009 0.035 < 0.0009
2013 2013-11-18 0.0009 0.035 < 0.0009
2013 2013-11-18 0.0009 0.035 < 0.0009
[+] Expand Test Data
17-beta-estradiol 0.0004 0.0009 < 0.0004 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.0004 0.0009 < 0.0004
2014 2014-08-13 0.0004 0.0009 < 0.0004
2014 2014-05-14 0.0004 0.0009 < 0.0004
2014 2014-05-14 0.0004 0.0009 < 0.0004
2014 2014-02-12 0.0004 0.0009 < 0.0004
2014 2014-02-12 0.0004 0.0009 < 0.0004
2013 2013-11-18 0.0004 0.0009 < 0.0004
2013 2013-11-18 0.0004 0.0009 < 0.0004
[+] Expand Test Data
4-androstene-3,17-dione 0.0003 0 0.0001 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.0003 0 < 0.0003
2014 2014-08-13 0.0003 0 < 0.0003
2014 2014-05-14 0.0003 0 < 0.0003
2014 2014-05-14 0.0003 0 < 0.0003
2014 2014-02-12 0.0003 0 < 0.0003
2014 2014-02-12 0.0003 0 0.00041
2013 2013-11-18 0.0003 0 < 0.0003
2013 2013-11-18 0.0003 0 < 0.0003
[+] Expand Test Data
bromomethane 0.2 140 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.2 140 < 0.2
2014 2014-08-13 0.2 140 < 0.2
2014 2014-05-14 0.2 140 < 0.2
2014 2014-05-14 0.2 140 < 0.2
2014 2014-02-12 0.2 140 < 0.2
2014 2014-02-12 0.2 140 < 0.2
2013 2013-11-18 0.2 140 < 0.2
2013 2013-11-18 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 2014-08-13 0.2 2.69 < 0.2
2014 2014-08-13 0.2 2.69 < 0.2
2014 2014-05-14 0.2 2.69 < 0.2
2014 2014-05-14 0.2 2.69 < 0.2
2014 2014-02-12 0.2 2.69 < 0.2
2014 2014-02-12 0.2 2.69 < 0.2
2013 2013-11-18 0.2 2.69 < 0.2
2013 2013-11-18 0.2 2.69 < 0.2
[+] Expand Test Data
equilin 0.004 0.35 < 0.004 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.004 0.35 < 0.004
2014 2014-08-13 0.004 0.35 < 0.004
2014 2014-05-14 0.004 0.35 < 0.004
2014 2014-05-14 0.004 0.35 < 0.004
2014 2014-02-12 0.004 0.35 < 0.004
2014 2014-02-12 0.004 0.35 < 0.004
2013 2013-11-18 0.004 0.35 < 0.004
2013 2013-11-18 0.004 0.35 < 0.004
[+] Expand Test Data
estriol 0.0008 0.35 < 0.0008 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.0008 0.35 < 0.0008
2014 2014-08-13 0.0008 0.35 < 0.0008
2014 2014-05-14 0.0008 0.35 < 0.0008
2014 2014-05-14 0.0008 0.35 < 0.0008
2014 2014-02-12 0.0008 0.35 < 0.0008
2014 2014-02-12 0.0008 0.35 < 0.0008
2013 2013-11-18 0.0008 0.35 < 0.0008
2013 2013-11-18 0.0008 0.35 < 0.0008
[+] Expand Test Data
estrone 0.002 0.35 < 0.002 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.002 0.35 < 0.002
2014 2014-08-13 0.002 0.35 < 0.002
2014 2014-05-14 0.002 0.35 < 0.002
2014 2014-05-14 0.002 0.35 < 0.002
2014 2014-02-12 0.002 0.35 < 0.002
2014 2014-02-12 0.002 0.35 < 0.002
2013 2013-11-18 0.002 0.35 < 0.002
2013 2013-11-18 0.002 0.35 < 0.002
[+] Expand Test Data
Halon 1011 0.06 90 < 0.06 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.06 90 < 0.06
2014 2014-08-13 0.06 90 < 0.06
2014 2014-05-14 0.06 90 < 0.06
2014 2014-05-14 0.06 90 < 0.06
2014 2014-02-12 0.06 90 < 0.06
2014 2014-02-12 0.06 90 < 0.06
2013 2013-11-18 0.06 90 < 0.06
2013 2013-11-18 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 2014-08-13 0.08 0 < 0.08
2014 2014-08-13 0.08 0 < 0.08
2014 2014-05-14 0.08 0 < 0.08
2014 2014-05-14 0.08 0 < 0.08
2014 2014-02-12 0.08 0 < 0.08
2014 2014-02-12 0.08 0 < 0.08
2013 2013-11-18 0.08 0 < 0.08
2013 2013-11-18 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 2014-08-13 0.09 0 < 0.09
2014 2014-08-13 0.09 0 < 0.09
2014 2014-05-14 0.09 0 < 0.09
2014 2014-05-14 0.09 0 < 0.09
2014 2014-02-12 0.09 0 < 0.09
2014 2014-02-12 0.09 0 < 0.09
2013 2013-11-18 0.09 0 < 0.09
2013 2013-11-18 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 2014-08-13 0.01 0 < 0.01
2014 2014-08-13 0.01 0 < 0.01
2014 2014-05-14 0.01 0 < 0.01
2014 2014-05-14 0.01 0 < 0.01
2014 2014-02-12 0.01 0 < 0.01
2014 2014-02-12 0.01 0 < 0.01
2013 2013-11-18 0.01 0 < 0.01
2013 2013-11-18 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 2014-08-13 0.03 0 < 0.03
2014 2014-08-13 0.03 0 < 0.03
2014 2014-05-14 0.03 0 < 0.03
2014 2014-05-14 0.03 0 < 0.03
2014 2014-02-12 0.03 0 < 0.03
2014 2014-02-12 0.03 0 < 0.03
2013 2013-11-18 0.03 0 < 0.03
2013 2013-11-18 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 2014-08-13 0.02 0 < 0.02
2014 2014-08-13 0.02 0 < 0.02
2014 2014-05-14 0.02 0 < 0.02
2014 2014-05-14 0.02 0 < 0.02
2014 2014-02-12 0.02 0 < 0.02
2014 2014-02-12 0.02 0 < 0.02
2013 2013-11-18 0.02 0 < 0.02
2013 2013-11-18 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 2014-08-13 0.02 0.07 < 0.02
2014 2014-08-13 0.02 0.07 < 0.02
2014 2014-05-14 0.02 0.07 < 0.02
2014 2014-05-14 0.02 0.07 < 0.02
2014 2014-02-12 0.02 0.07 < 0.02
2014 2014-02-12 0.02 0.07 < 0.02
2013 2013-11-18 0.02 0.07 < 0.02
2013 2013-11-18 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 2014-08-13 0.04 0.07 < 0.04
2014 2014-08-13 0.04 0.07 < 0.04
2014 2014-05-14 0.04 0.07 < 0.04
2014 2014-05-14 0.04 0.07 < 0.04
2014 2014-02-12 0.04 0.07 < 0.04
2014 2014-02-12 0.04 0.07 < 0.04
2013 2013-11-18 0.04 0.07 < 0.04
2013 2013-11-18 0.04 0.07 < 0.04
[+] Expand Test Data
testosterone 0.0001 0 < 0.0001 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-08-13 0.0001 0 < 0.0001
2014 2014-08-13 0.0001 0 < 0.0001
2014 2014-05-14 0.0001 0 < 0.0001
2014 2014-05-14 0.0001 0 < 0.0001
2014 2014-02-12 0.0001 0 < 0.0001
2014 2014-02-12 0.0001 0 < 0.0001
2013 2013-11-18 0.0001 0 < 0.0001
2013 2013-11-18 0.0001 0 < 0.0001
[+] 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
CA63948 lead 2016-01-01 2018-12-31 0.00423mg/L
CA49187 lead 2013-01-01 2015-12-31 0mg/L
191023412214LT5 lead 2012-01-01 2012-12-31 0.002mg/L
CA38785 lead 2010-01-01 2012-12-31 0.002mg/L
191023410168L6M2ND-1 lead 2010-01-01 2010-12-31 0.006mg/L
191023410175LT4 lead 2010-01-01 2010-12-31 0.003mg/L
191023410244LT3 lead 2010-01-01 2010-12-31 0.002mg/L
191023410246LT1 lead 2010-01-01 2010-12-31 0.005mg/L
191023410260LT2 lead 2010-01-01 2010-12-31 0.003mg/L
191023409211LT4 lead 2009-01-01 2009-12-31 0.003mg/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) Returned to Compliance

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.

Unable to identify any nearby water testing labs near 91789.

Water Bill Information

Convenient information about your water service.

Unable to identify any billing information about Walnut Valley Water District (CA1910234).

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.