Public Water System: Patterson, 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: CA5010017
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Ground water
Population Served: 22,560
Contact Information
WILLETT, MIKE
WILLETT, MIKE
1 PLAZA
PATTERSON, CA 95363

This public water system services 1 zip code 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   (3) 2014   (0) 2015   (0)
strontium
1,2,3-trichloropropane
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).

strontium
Is this in your home's pipes?

Year Test Date MRL HRL Test Result
2013 2013-10-23 0.3 1500 1200
2013 2013-10-23 0.3 1500 2100
2013 2013-10-23 0.3 1500 1500
2013 2013-10-23 0.3 1500 2400
2013 2013-10-23 0.3 1500 1200
2013 2013-10-23 0.3 1500 1500
2013 2013-10-23 0.3 1500 2900
2013 2013-10-23 0.3 1500 3200
2013 2013-10-23 0.3 1500 1300
2013 2013-10-23 0.3 1500 2300
2013 2013-10-23 0.3 1500 1500
2013 2013-10-23 0.3 1500 1600
2013 2013-10-23 0.3 1500 1500
2013 2013-04-24 0.3 1500 1200
2013 2013-04-24 0.3 1500 1500
2013 2013-04-24 0.3 1500 2300
2013 2013-04-24 0.3 1500 1300
2013 2013-04-24 0.3 1500 2100
2013 2013-04-24 0.3 1500 2300
2013 2013-04-24 0.3 1500 1800
2013 2013-04-24 0.3 1500 1300
2013 2013-04-24 0.3 1500 1300
2013 2013-04-24 0.3 1500 2100
2013 2013-04-24 0.3 1500 1400
2013 2013-04-24 0.3 1500 2100
2013 2013-04-24 0.3 1500 1200

1,2,3-trichloropropane
Is this in your home's pipes?

Year Test Date MRL HRL Test Result
2013 2013-10-23 0.03 0.0004 < 0.03
2013 2013-10-23 0.03 0.0004 < 0.03
2013 2013-10-23 0.03 0.0004 < 0.03
2013 2013-10-23 0.03 0.0004 < 0.03
2013 2013-10-23 0.03 0.0004 < 0.03
2013 2013-10-23 0.03 0.0004 < 0.03
2013 2013-10-23 0.03 0.0004 < 0.03
2013 2013-04-24 0.03 0.0004 0.1
2013 2013-04-24 0.03 0.0004 < 0.03
2013 2013-04-24 0.03 0.0004 < 0.03
2013 2013-04-24 0.03 0.0004 < 0.03
2013 2013-04-24 0.03 0.0004 < 0.03
2013 2013-04-24 0.03 0.0004 < 0.03
2013 2013-04-24 0.03 0.0004 < 0.03

chlorate
Is this in your home's pipes?

Year Test Date MRL HRL Test Result
2013 2013-10-23 20 210 < 20
2013 2013-10-23 20 210 < 20
2013 2013-10-23 20 210 51
2013 2013-10-23 20 210 400
2013 2013-10-23 20 210 94
2013 2013-10-23 20 210 86
2013 2013-10-23 20 210 60
2013 2013-10-23 20 210 49
2013 2013-10-23 20 210 < 20
2013 2013-10-23 20 210 < 20
2013 2013-10-23 20 210 < 20
2013 2013-10-23 20 210 24
2013 2013-10-23 20 210 < 20
2013 2013-05-09 20 210 < 20
2013 2013-05-09 20 210 < 20
2013 2013-05-09 20 210 32
2013 2013-05-09 20 210 48
2013 2013-05-09 20 210 100
2013 2013-05-09 20 210 < 20
2013 2013-05-09 20 210 22
2013 2013-05-09 20 210 46
2013 2013-05-09 20 210 < 20
2013 2013-05-09 20 210 < 20
2013 2013-05-09 20 210 < 20
2013 2013-05-09 20 210 < 20
2013 2013-05-09 20 210 82

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
chromium-6 0.03 0 18.0154 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.03 0 15
2013 2013-10-23 0.03 0 18
2013 2013-10-23 0.03 0 26
2013 2013-10-23 0.03 0 16
2013 2013-10-23 0.03 0 17
2013 2013-10-23 0.03 0 19
2013 2013-10-23 0.03 0 17
2013 2013-10-23 0.03 0 16
2013 2013-10-23 0.03 0 19
2013 2013-10-23 0.03 0 17
2013 2013-10-23 0.03 0 18
2013 2013-10-23 0.03 0 17
2013 2013-10-23 0.03 0 18
2013 2013-04-24 0.03 0 22
2013 2013-04-24 0.03 0 3.4
2013 2013-04-24 0.03 0 20
2013 2013-04-24 0.03 0 18
2013 2013-04-24 0.03 0 20
2013 2013-04-24 0.03 0 16
2013 2013-04-24 0.03 0 22
2013 2013-04-24 0.03 0 18
2013 2013-04-24 0.03 0 24
2013 2013-04-24 0.03 0 18
2013 2013-04-24 0.03 0 16
2013 2013-04-24 0.03 0 19
2013 2013-04-24 0.03 0 19
chromium 0.2 100 19.1923 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.2 100 17
2013 2013-10-23 0.2 100 34
2013 2013-10-23 0.2 100 22
2013 2013-10-23 0.2 100 18
2013 2013-10-23 0.2 100 26
2013 2013-10-23 0.2 100 18
2013 2013-10-23 0.2 100 17
2013 2013-10-23 0.2 100 19
2013 2013-10-23 0.2 100 20
2013 2013-10-23 0.2 100 16
2013 2013-10-23 0.2 100 20
2013 2013-10-23 0.2 100 18
2013 2013-10-23 0.2 100 17
2013 2013-04-24 0.2 100 19
2013 2013-04-24 0.2 100 17
2013 2013-04-24 0.2 100 16
2013 2013-04-24 0.2 100 25
2013 2013-04-24 0.2 100 16
2013 2013-04-24 0.2 100 20
2013 2013-04-24 0.2 100 19
2013 2013-04-24 0.2 100 17
2013 2013-04-24 0.2 100 18
2013 2013-04-24 0.2 100 21
2013 2013-04-24 0.2 100 16
2013 2013-04-24 0.2 100 16
2013 2013-04-24 0.2 100 17
chloromethane 0.2 2.69 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.2 2.69 < 0.2
2013 2013-10-23 0.2 2.69 < 0.2
2013 2013-10-23 0.2 2.69 < 0.2
2013 2013-10-23 0.2 2.69 < 0.2
2013 2013-10-23 0.2 2.69 < 0.2
2013 2013-10-23 0.2 2.69 < 0.2
2013 2013-10-23 0.2 2.69 < 0.2
2013 2013-04-24 0.2 2.69 < 0.2
2013 2013-04-24 0.2 2.69 < 0.2
2013 2013-04-24 0.2 2.69 < 0.2
2013 2013-04-24 0.2 2.69 < 0.2
2013 2013-04-24 0.2 2.69 < 0.2
2013 2013-04-24 0.2 2.69 < 0.2
2013 2013-04-24 0.2 2.69 < 0.2
PFNA 0.02 0 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.02 0 < 0.02
2013 2013-10-23 0.02 0 < 0.02
2013 2013-10-23 0.02 0 < 0.02
2013 2013-10-23 0.02 0 < 0.02
2013 2013-10-23 0.02 0 < 0.02
2013 2013-10-23 0.02 0 < 0.02
2013 2013-10-23 0.02 0 < 0.02
2013 2013-04-24 0.02 0 < 0.02
2013 2013-04-24 0.02 0 < 0.02
2013 2013-04-24 0.02 0 < 0.02
2013 2013-04-24 0.02 0 < 0.02
2013 2013-04-24 0.02 0 < 0.02
2013 2013-04-24 0.02 0 < 0.02
2013 2013-04-24 0.02 0 < 0.02
PFOS 0.04 0.07 < 0.04 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.04 0.07 < 0.04
2013 2013-10-23 0.04 0.07 < 0.04
2013 2013-10-23 0.04 0.07 < 0.04
2013 2013-10-23 0.04 0.07 < 0.04
2013 2013-10-23 0.04 0.07 < 0.04
2013 2013-10-23 0.04 0.07 < 0.04
2013 2013-10-23 0.04 0.07 < 0.04
2013 2013-04-24 0.04 0.07 < 0.04
2013 2013-04-24 0.04 0.07 < 0.04
2013 2013-04-24 0.04 0.07 < 0.04
2013 2013-04-24 0.04 0.07 < 0.04
2013 2013-04-24 0.04 0.07 < 0.04
2013 2013-04-24 0.04 0.07 < 0.04
2013 2013-04-24 0.04 0.07 < 0.04
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.03 6.14 < 0.03
2013 2013-10-23 0.03 6.14 < 0.03
2013 2013-10-23 0.03 6.14 < 0.03
2013 2013-10-23 0.03 6.14 < 0.03
2013 2013-10-23 0.03 6.14 < 0.03
2013 2013-10-23 0.03 6.14 < 0.03
2013 2013-10-23 0.03 6.14 < 0.03
2013 2013-04-24 0.03 6.14 < 0.03
2013 2013-04-24 0.03 6.14 < 0.03
2013 2013-04-24 0.03 6.14 < 0.03
2013 2013-04-24 0.03 6.14 < 0.03
2013 2013-04-24 0.03 6.14 < 0.03
2013 2013-04-24 0.03 6.14 < 0.03
2013 2013-04-24 0.03 6.14 < 0.03
PFHxS 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.03 0 < 0.03
2013 2013-10-23 0.03 0 < 0.03
2013 2013-10-23 0.03 0 < 0.03
2013 2013-10-23 0.03 0 < 0.03
2013 2013-10-23 0.03 0 < 0.03
2013 2013-10-23 0.03 0 < 0.03
2013 2013-10-23 0.03 0 < 0.03
2013 2013-04-24 0.03 0 < 0.03
2013 2013-04-24 0.03 0 < 0.03
2013 2013-04-24 0.03 0 < 0.03
2013 2013-04-24 0.03 0 < 0.03
2013 2013-04-24 0.03 0 < 0.03
2013 2013-04-24 0.03 0 < 0.03
2013 2013-04-24 0.03 0 < 0.03
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.09 0 < 0.09
2013 2013-10-23 0.09 0 < 0.09
2013 2013-10-23 0.09 0 < 0.09
2013 2013-10-23 0.09 0 < 0.09
2013 2013-10-23 0.09 0 < 0.09
2013 2013-10-23 0.09 0 < 0.09
2013 2013-10-23 0.09 0 < 0.09
2013 2013-04-24 0.09 0 < 0.09
2013 2013-04-24 0.09 0 < 0.09
2013 2013-04-24 0.09 0 < 0.09
2013 2013-04-24 0.09 0 < 0.09
2013 2013-04-24 0.09 0 < 0.09
2013 2013-04-24 0.09 0 < 0.09
2013 2013-04-24 0.09 0 < 0.09
PFOA 0.02 0.07 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.02 0.07 < 0.02
2013 2013-10-23 0.02 0.07 < 0.02
2013 2013-10-23 0.02 0.07 < 0.02
2013 2013-10-23 0.02 0.07 < 0.02
2013 2013-10-23 0.02 0.07 < 0.02
2013 2013-10-23 0.02 0.07 < 0.02
2013 2013-10-23 0.02 0.07 < 0.02
2013 2013-04-24 0.02 0.07 < 0.02
2013 2013-04-24 0.02 0.07 < 0.02
2013 2013-04-24 0.02 0.07 < 0.02
2013 2013-04-24 0.02 0.07 < 0.02
2013 2013-04-24 0.02 0.07 < 0.02
2013 2013-04-24 0.02 0.07 < 0.02
2013 2013-04-24 0.02 0.07 < 0.02
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
2013 2013-04-24 1 70 < 1
molybdenum 1 40 1.3385 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 1 40 1.2
2013 2013-10-23 1 40 1.7
2013 2013-10-23 1 40 2.8
2013 2013-10-23 1 40 < 1
2013 2013-10-23 1 40 < 1
2013 2013-10-23 1 40 1.1
2013 2013-10-23 1 40 < 1
2013 2013-10-23 1 40 2.9
2013 2013-10-23 1 40 1.3
2013 2013-10-23 1 40 < 1
2013 2013-10-23 1 40 3
2013 2013-10-23 1 40 2.9
2013 2013-10-23 1 40 2.5
2013 2013-04-24 1 40 1.2
2013 2013-04-24 1 40 < 1
2013 2013-04-24 1 40 < 1
2013 2013-04-24 1 40 1.3
2013 2013-04-24 1 40 < 1
2013 2013-04-24 1 40 2.9
2013 2013-04-24 1 40 < 1
2013 2013-04-24 1 40 2.3
2013 2013-04-24 1 40 < 1
2013 2013-04-24 1 40 2.9
2013 2013-04-24 1 40 3.2
2013 2013-04-24 1 40 < 1
2013 2013-04-24 1 40 1.6
vanadium 0.2 21 8.7923 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.2 21 12
2013 2013-10-23 0.2 21 5.1
2013 2013-10-23 0.2 21 10
2013 2013-10-23 0.2 21 12
2013 2013-10-23 0.2 21 9
2013 2013-10-23 0.2 21 13
2013 2013-10-23 0.2 21 9.7
2013 2013-10-23 0.2 21 7.5
2013 2013-10-23 0.2 21 11
2013 2013-10-23 0.2 21 8.9
2013 2013-10-23 0.2 21 7.9
2013 2013-10-23 0.2 21 4.2
2013 2013-10-23 0.2 21 6.3
2013 2013-04-24 0.2 21 10
2013 2013-04-24 0.2 21 10
2013 2013-04-24 0.2 21 8.9
2013 2013-04-24 0.2 21 8.9
2013 2013-04-24 0.2 21 9.4
2013 2013-04-24 0.2 21 11
2013 2013-04-24 0.2 21 6.8
2013 2013-04-24 0.2 21 8.9
2013 2013-04-24 0.2 21 8.9
2013 2013-04-24 0.2 21 5.9
2013 2013-04-24 0.2 21 7.6
2013 2013-04-24 0.2 21 8.8
2013 2013-04-24 0.2 21 6.9
Halon 1011 0.06 90 < 0.06 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.06 90 < 0.06
2013 2013-10-23 0.06 90 < 0.06
2013 2013-10-23 0.06 90 < 0.06
2013 2013-10-23 0.06 90 < 0.06
2013 2013-10-23 0.06 90 < 0.06
2013 2013-10-23 0.06 90 < 0.06
2013 2013-10-23 0.06 90 < 0.06
2013 2013-04-24 0.06 90 < 0.06
2013 2013-04-24 0.06 90 < 0.06
2013 2013-04-24 0.06 90 < 0.06
2013 2013-04-24 0.06 90 < 0.06
2013 2013-04-24 0.06 90 < 0.06
2013 2013-04-24 0.06 90 < 0.06
2013 2013-04-24 0.06 90 < 0.06
1,3-butadiene 0.1 0.0103 < 0.1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.1 0.0103 < 0.1
2013 2013-10-23 0.1 0.0103 < 0.1
2013 2013-10-23 0.1 0.0103 < 0.1
2013 2013-10-23 0.1 0.0103 < 0.1
2013 2013-10-23 0.1 0.0103 < 0.1
2013 2013-10-23 0.1 0.0103 < 0.1
2013 2013-10-23 0.1 0.0103 < 0.1
2013 2013-04-24 0.1 0.0103 < 0.1
2013 2013-04-24 0.1 0.0103 < 0.1
2013 2013-04-24 0.1 0.0103 < 0.1
2013 2013-04-24 0.1 0.0103 < 0.1
2013 2013-04-24 0.1 0.0103 < 0.1
2013 2013-04-24 0.1 0.0103 < 0.1
2013 2013-04-24 0.1 0.0103 < 0.1
bromomethane 0.2 140 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.2 140 < 0.2
2013 2013-10-23 0.2 140 < 0.2
2013 2013-10-23 0.2 140 < 0.2
2013 2013-10-23 0.2 140 < 0.2
2013 2013-10-23 0.2 140 < 0.2
2013 2013-10-23 0.2 140 < 0.2
2013 2013-10-23 0.2 140 < 0.2
2013 2013-04-24 0.2 140 < 0.2
2013 2013-04-24 0.2 140 < 0.2
2013 2013-04-24 0.2 140 < 0.2
2013 2013-04-24 0.2 140 < 0.2
2013 2013-04-24 0.2 140 < 0.2
2013 2013-04-24 0.2 140 < 0.2
2013 2013-04-24 0.2 140 < 0.2
HCFC-22 0.08 0 < 0.08 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.08 0 < 0.08
2013 2013-10-23 0.08 0 < 0.08
2013 2013-10-23 0.08 0 < 0.08
2013 2013-10-23 0.08 0 < 0.08
2013 2013-10-23 0.08 0 < 0.08
2013 2013-10-23 0.08 0 < 0.08
2013 2013-10-23 0.08 0 < 0.08
2013 2013-04-24 0.08 0 < 0.08
2013 2013-04-24 0.08 0 < 0.08
2013 2013-04-24 0.08 0 < 0.08
2013 2013-04-24 0.08 0 < 0.08
2013 2013-04-24 0.08 0 < 0.08
2013 2013-04-24 0.08 0 < 0.08
2013 2013-04-24 0.08 0 < 0.08
PFHpA 0.01 0 < 0.01 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.01 0 < 0.01
2013 2013-10-23 0.01 0 < 0.01
2013 2013-10-23 0.01 0 < 0.01
2013 2013-10-23 0.01 0 < 0.01
2013 2013-10-23 0.01 0 < 0.01
2013 2013-10-23 0.01 0 < 0.01
2013 2013-10-23 0.01 0 < 0.01
2013 2013-04-24 0.01 0 < 0.01
2013 2013-04-24 0.01 0 < 0.01
2013 2013-04-24 0.01 0 < 0.01
2013 2013-04-24 0.01 0 < 0.01
2013 2013-04-24 0.01 0 < 0.01
2013 2013-04-24 0.01 0 < 0.01
2013 2013-04-24 0.01 0 < 0.01
1,4-dioxane 0.07 0.35 < 0.07 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-15 0.07 0.35 < 0.07
2015 2015-09-15 0.07 0.35 < 0.07
2015 2015-09-15 0.07 0.35 < 0.07
2015 2015-09-15 0.07 0.35 < 0.07
2015 2015-09-15 0.07 0.35 < 0.07
2015 2015-09-15 0.07 0.35 < 0.07
2015 2015-09-15 0.07 0.35 < 0.07
2013 2013-04-24 0.07 0.35 < 0.07
2013 2013-04-24 0.07 0.35 < 0.07
2013 2013-04-24 0.07 0.35 < 0.07
2013 2013-04-24 0.07 0.35 < 0.07
2013 2013-04-24 0.07 0.35 < 0.07
2013 2013-04-24 0.07 0.35 < 0.07
2013 2013-04-24 0.07 0.35 < 0.07

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
CA49049 lead 2013-01-01 2015-12-31 0mg/L
CA37671 lead 2010-01-01 2012-12-31 0.0006mg/L
501001712250L lead 2012-01-01 2012-12-31 0.0006mg/L
501001709244L lead 2009-01-01 2009-12-31 0.0018mg/L

Violations


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

Compliance Dates Rule Violation Type Contaminant Name Status
2007-01-01 - 2007-03-31 Nitrates Maximum Contaminant Level Violation, Average Nitrate Returned to Compliance
2003-06-01 - 2003-06-30 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
1994-11-01 - 1994-11-30 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
1989-08-01 - 1989-08-31 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.