Public Water System: Shafter, 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: CA1510019
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Ground water
Population Served: 19,100
Contact Information
JAMES, MICHAEL
JAMES, MICHAEL
336 PACIFIC AVENUE
SHAFTER, CA 93263

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   (2) 2014   (2) 2015   (0)
chlorate
1,2,3-trichloropropane
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).

chlorate
Is this in your home's pipes?

Year Test Date MRL HRL Test Result
2014 2014-04-08 20 210 < 20
2014 2014-04-08 20 210 42
2014 2014-04-08 20 210 190
2014 2014-04-08 20 210 150
2014 2014-04-08 20 210 < 20
2014 2014-04-08 20 210 330
2014 2014-04-08 20 210 300
2014 2014-04-08 20 210 130
2014 2014-04-08 20 210 110
2014 2014-04-08 20 210 170
2014 2014-04-08 20 210 120
2014 2014-04-08 20 210 1500
2013 2013-10-02 20 210 230
2013 2013-09-19 20 210 410
2013 2013-09-19 20 210 280
2013 2013-09-19 20 210 300
2013 2013-09-19 20 210 280
2013 2013-09-19 20 210 270
2013 2013-09-19 20 210 360
2013 2013-09-19 20 210 400
2013 2013-09-19 20 210 260
2013 2013-09-19 20 210 570
2013 2013-09-19 20 210 130
2013 2013-09-19 20 210 < 20

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

Year Test Date MRL HRL Test Result
2014 2014-04-08 0.03 0.0004 0.14
2014 2014-04-08 0.03 0.0004 0.21
2014 2014-04-08 0.03 0.0004 < 0.03
2014 2014-04-08 0.03 0.0004 < 0.03
2014 2014-04-08 0.03 0.0004 0.14
2014 2014-04-08 0.03 0.0004 0.28
2013 2013-10-02 0.03 0.0004 < 0.03
2013 2013-09-19 0.03 0.0004 0.13
2013 2013-09-19 0.03 0.0004 0.1
2013 2013-09-19 0.03 0.0004 < 0.03
2013 2013-09-19 0.03 0.0004 0.037
2013 2013-09-19 0.03 0.0004 0.17

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
chloromethane 0.2 2.69 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.2 2.69 < 0.2
2014 2014-04-08 0.2 2.69 < 0.2
2014 2014-04-08 0.2 2.69 < 0.2
2014 2014-04-08 0.2 2.69 < 0.2
2014 2014-04-08 0.2 2.69 < 0.2
2014 2014-04-08 0.2 2.69 < 0.2
2013 2013-10-02 0.2 2.69 < 0.2
2013 2013-09-19 0.2 2.69 < 0.2
2013 2013-09-19 0.2 2.69 < 0.2
2013 2013-09-19 0.2 2.69 < 0.2
2013 2013-09-19 0.2 2.69 < 0.2
2013 2013-09-19 0.2 2.69 < 0.2
PFNA 0.02 0 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.02 0 < 0.02
2014 2014-04-08 0.02 0 < 0.02
2014 2014-04-08 0.02 0 < 0.02
2014 2014-04-08 0.02 0 < 0.02
2014 2014-04-08 0.02 0 < 0.02
2014 2014-04-08 0.02 0 < 0.02
2013 2013-10-02 0.02 0 < 0.02
2013 2013-09-19 0.02 0 < 0.02
2013 2013-09-19 0.02 0 < 0.02
2013 2013-09-19 0.02 0 < 0.02
2013 2013-09-19 0.02 0 < 0.02
2013 2013-09-19 0.02 0 < 0.02
PFHpA 0.01 0 < 0.01 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.01 0 < 0.01
2014 2014-04-08 0.01 0 < 0.01
2014 2014-04-08 0.01 0 < 0.01
2014 2014-04-08 0.01 0 < 0.01
2014 2014-04-08 0.01 0 < 0.01
2014 2014-04-08 0.01 0 < 0.01
2013 2013-10-02 0.01 0 < 0.01
2013 2013-09-19 0.01 0 < 0.01
2013 2013-09-19 0.01 0 < 0.01
2013 2013-09-19 0.01 0 < 0.01
2013 2013-09-19 0.01 0 < 0.01
2013 2013-09-19 0.01 0 < 0.01
HCFC-22 0.08 0 < 0.08 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.08 0 < 0.08
2014 2014-04-08 0.08 0 < 0.08
2014 2014-04-08 0.08 0 < 0.08
2014 2014-04-08 0.08 0 < 0.08
2014 2014-04-08 0.08 0 < 0.08
2014 2014-04-08 0.08 0 < 0.08
2013 2013-10-02 0.08 0 < 0.08
2013 2013-09-19 0.08 0 < 0.08
2013 2013-09-19 0.08 0 < 0.08
2013 2013-09-19 0.08 0 < 0.08
2013 2013-09-19 0.08 0 < 0.08
2013 2013-09-19 0.08 0 < 0.08
PFOS 0.04 0.07 < 0.04 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.04 0.07 < 0.04
2014 2014-04-08 0.04 0.07 < 0.04
2014 2014-04-08 0.04 0.07 < 0.04
2014 2014-04-08 0.04 0.07 < 0.04
2014 2014-04-08 0.04 0.07 < 0.04
2014 2014-04-08 0.04 0.07 < 0.04
2013 2013-10-02 0.04 0.07 < 0.04
2013 2013-09-19 0.04 0.07 < 0.04
2013 2013-09-19 0.04 0.07 < 0.04
2013 2013-09-19 0.04 0.07 < 0.04
2013 2013-09-19 0.04 0.07 < 0.04
2013 2013-09-19 0.04 0.07 < 0.04
PFOA 0.02 0.07 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.02 0.07 < 0.02
2014 2014-04-08 0.02 0.07 < 0.02
2014 2014-04-08 0.02 0.07 < 0.02
2014 2014-04-08 0.02 0.07 < 0.02
2014 2014-04-08 0.02 0.07 < 0.02
2014 2014-04-08 0.02 0.07 < 0.02
2013 2013-10-02 0.02 0.07 < 0.02
2013 2013-09-19 0.02 0.07 < 0.02
2013 2013-09-19 0.02 0.07 < 0.02
2013 2013-09-19 0.02 0.07 < 0.02
2013 2013-09-19 0.02 0.07 < 0.02
2013 2013-09-19 0.02 0.07 < 0.02
bromomethane 0.2 140 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.2 140 < 0.2
2014 2014-04-08 0.2 140 < 0.2
2014 2014-04-08 0.2 140 < 0.2
2014 2014-04-08 0.2 140 < 0.2
2014 2014-04-08 0.2 140 < 0.2
2014 2014-04-08 0.2 140 < 0.2
2013 2013-10-02 0.2 140 < 0.2
2013 2013-09-19 0.2 140 < 0.2
2013 2013-09-19 0.2 140 < 0.2
2013 2013-09-19 0.2 140 < 0.2
2013 2013-09-19 0.2 140 < 0.2
2013 2013-09-19 0.2 140 < 0.2
1,4-dioxane 0.07 0.35 < 0.07 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.07 0.35 < 0.07
2014 2014-04-08 0.07 0.35 < 0.07
2014 2014-04-08 0.07 0.35 < 0.07
2014 2014-04-08 0.07 0.35 < 0.07
2014 2014-04-08 0.07 0.35 < 0.07
2013 2013-10-02 0.07 0.35 < 0.07
2013 2013-09-19 0.07 0.35 < 0.07
2013 2013-09-19 0.07 0.35 < 0.07
2013 2013-09-19 0.07 0.35 < 0.07
2013 2013-09-19 0.07 0.35 < 0.07
2013 2013-09-19 0.07 0.35 < 0.07
vanadium 0.2 21 10.8208 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.2 21 7.3
2014 2014-04-08 0.2 21 8.6
2014 2014-04-08 0.2 21 8.7
2014 2014-04-08 0.2 21 7
2014 2014-04-08 0.2 21 16
2014 2014-04-08 0.2 21 12
2014 2014-04-08 0.2 21 11
2014 2014-04-08 0.2 21 13
2014 2014-04-08 0.2 21 13
2014 2014-04-08 0.2 21 16
2014 2014-04-08 0.2 21 3.9
2014 2014-04-08 0.2 21 5.4
2013 2013-11-07 0.2 21 8.3
2013 2013-11-07 0.2 21 16
2013 2013-11-07 0.2 21 12
2013 2013-11-07 0.2 21 17
2013 2013-11-07 0.2 21 10
2013 2013-11-07 0.2 21 11
2013 2013-09-19 0.2 21 7.6
2013 2013-09-19 0.2 21 9.1
2013 2013-09-19 0.2 21 14
2013 2013-09-19 0.2 21 9.2
2013 2013-09-19 0.2 21 18
2013 2013-09-19 0.2 21 5.6
molybdenum 1 40 1.5875 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 1 40 2.2
2014 2014-04-08 1 40 1.7
2014 2014-04-08 1 40 1.1
2014 2014-04-08 1 40 2.1
2014 2014-04-08 1 40 1.9
2014 2014-04-08 1 40 2.1
2014 2014-04-08 1 40 1.2
2014 2014-04-08 1 40 1.1
2014 2014-04-08 1 40 1.2
2014 2014-04-08 1 40 1.9
2014 2014-04-08 1 40 < 1
2014 2014-04-08 1 40 1.5
2013 2013-11-07 1 40 1.5
2013 2013-11-07 1 40 2.2
2013 2013-11-07 1 40 1.9
2013 2013-11-07 1 40 2.1
2013 2013-11-07 1 40 1.1
2013 2013-11-07 1 40 1.1
2013 2013-09-19 1 40 2.1
2013 2013-09-19 1 40 1.9
2013 2013-09-19 1 40 1.4
2013 2013-09-19 1 40 1.6
2013 2013-09-19 1 40 1.8
2013 2013-09-19 1 40 1.4
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 1 70 < 1
2014 2014-04-08 1 70 < 1
2014 2014-04-08 1 70 < 1
2014 2014-04-08 1 70 < 1
2014 2014-04-08 1 70 < 1
2014 2014-04-08 1 70 < 1
2014 2014-04-08 1 70 < 1
2014 2014-04-08 1 70 < 1
2014 2014-04-08 1 70 < 1
2014 2014-04-08 1 70 < 1
2014 2014-04-08 1 70 < 1
2014 2014-04-08 1 70 < 1
2013 2013-11-07 1 70 < 1
2013 2013-11-07 1 70 < 1
2013 2013-11-07 1 70 < 1
2013 2013-11-07 1 70 < 1
2013 2013-11-07 1 70 < 1
2013 2013-11-07 1 70 < 1
2013 2013-09-19 1 70 < 1
2013 2013-09-19 1 70 < 1
2013 2013-09-19 1 70 < 1
2013 2013-09-19 1 70 < 1
2013 2013-09-19 1 70 < 1
2013 2013-09-19 1 70 < 1
chromium-6 0.03 0 2.4525 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.03 0 2.7
2014 2014-04-08 0.03 0 2.3
2014 2014-04-08 0.03 0 2.6
2014 2014-04-08 0.03 0 2.7
2014 2014-04-08 0.03 0 2.7
2014 2014-04-08 0.03 0 2.1
2014 2014-04-08 0.03 0 2.6
2014 2014-04-08 0.03 0 2.7
2014 2014-04-08 0.03 0 2.4
2014 2014-04-08 0.03 0 3
2014 2014-04-08 0.03 0 2.3
2014 2014-04-08 0.03 0 2
2013 2013-10-02 0.03 0 2
2013 2013-09-19 0.03 0 2.6
2013 2013-09-19 0.03 0 2.2
2013 2013-09-19 0.03 0 4.7
2013 2013-09-19 0.03 0 2.6
2013 2013-09-19 0.03 0 0.16
2013 2013-09-19 0.03 0 2.2
2013 2013-09-19 0.03 0 2.4
2013 2013-09-19 0.03 0 2.6
2013 2013-09-19 0.03 0 2.5
2013 2013-09-19 0.03 0 2.7
2013 2013-09-19 0.03 0 2.1
PFHxS 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.03 0 < 0.03
2014 2014-04-08 0.03 0 < 0.03
2014 2014-04-08 0.03 0 < 0.03
2014 2014-04-08 0.03 0 < 0.03
2014 2014-04-08 0.03 0 < 0.03
2014 2014-04-08 0.03 0 < 0.03
2013 2013-10-02 0.03 0 < 0.03
2013 2013-09-19 0.03 0 < 0.03
2013 2013-09-19 0.03 0 < 0.03
2013 2013-09-19 0.03 0 < 0.03
2013 2013-09-19 0.03 0 < 0.03
2013 2013-09-19 0.03 0 < 0.03
chromium 0.2 100 2.6417 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.2 100 2.8
2014 2014-04-08 0.2 100 2.6
2014 2014-04-08 0.2 100 2.3
2014 2014-04-08 0.2 100 2.7
2014 2014-04-08 0.2 100 3.2
2014 2014-04-08 0.2 100 2.3
2014 2014-04-08 0.2 100 2.3
2014 2014-04-08 0.2 100 2.8
2014 2014-04-08 0.2 100 2.3
2014 2014-04-08 0.2 100 2.7
2014 2014-04-08 0.2 100 2.9
2014 2014-04-08 0.2 100 2.4
2013 2013-11-07 0.2 100 3
2013 2013-11-07 0.2 100 3.1
2013 2013-11-07 0.2 100 3.3
2013 2013-11-07 0.2 100 2.3
2013 2013-11-07 0.2 100 2.3
2013 2013-11-07 0.2 100 2
2013 2013-09-19 0.2 100 2.8
2013 2013-09-19 0.2 100 2.4
2013 2013-09-19 0.2 100 2.5
2013 2013-09-19 0.2 100 3.4
2013 2013-09-19 0.2 100 2.8
2013 2013-09-19 0.2 100 2.2
Halon 1011 0.06 90 < 0.06 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.06 90 < 0.06
2014 2014-04-08 0.06 90 < 0.06
2014 2014-04-08 0.06 90 < 0.06
2014 2014-04-08 0.06 90 < 0.06
2014 2014-04-08 0.06 90 < 0.06
2014 2014-04-08 0.06 90 < 0.06
2013 2013-10-02 0.06 90 < 0.06
2013 2013-09-19 0.06 90 < 0.06
2013 2013-09-19 0.06 90 < 0.06
2013 2013-09-19 0.06 90 < 0.06
2013 2013-09-19 0.06 90 < 0.06
2013 2013-09-19 0.06 90 < 0.06
strontium 0.3 1500 692.5 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-05-13 0.3 1500 400
2014 2014-04-08 0.3 1500 730
2014 2014-04-08 0.3 1500 1100
2014 2014-04-08 0.3 1500 740
2014 2014-04-08 0.3 1500 430
2014 2014-04-08 0.3 1500 800
2014 2014-04-08 0.3 1500 780
2014 2014-04-08 0.3 1500 660
2014 2014-04-08 0.3 1500 770
2014 2014-04-08 0.3 1500 790
2014 2014-04-08 0.3 1500 1100
2014 2014-04-08 0.3 1500 850
2013 2013-12-23 0.3 1500 490
2013 2013-11-07 0.3 1500 770
2013 2013-11-07 0.3 1500 580
2013 2013-11-07 0.3 1500 640
2013 2013-11-07 0.3 1500 760
2013 2013-11-07 0.3 1500 750
2013 2013-09-19 0.3 1500 640
2013 2013-09-19 0.3 1500 720
2013 2013-09-19 0.3 1500 570
2013 2013-09-19 0.3 1500 370
2013 2013-09-19 0.3 1500 480
2013 2013-09-19 0.3 1500 700
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.09 0 < 0.09
2014 2014-04-08 0.09 0 < 0.09
2014 2014-04-08 0.09 0 < 0.09
2014 2014-04-08 0.09 0 < 0.09
2014 2014-04-08 0.09 0 < 0.09
2014 2014-04-08 0.09 0 < 0.09
2013 2013-10-02 0.09 0 < 0.09
2013 2013-09-19 0.09 0 < 0.09
2013 2013-09-19 0.09 0 < 0.09
2013 2013-09-19 0.09 0 < 0.09
2013 2013-09-19 0.09 0 < 0.09
2013 2013-09-19 0.09 0 < 0.09
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-04-08 0.03 6.14 < 0.03
2014 2014-04-08 0.03 6.14 < 0.03
2014 2014-04-08 0.03 6.14 < 0.03
2014 2014-04-08 0.03 6.14 < 0.03
2014 2014-04-08 0.03 6.14 < 0.03
2014 2014-04-08 0.03 6.14 < 0.03
2013 2013-10-02 0.03 6.14 < 0.03
2013 2013-09-19 0.03 6.14 < 0.03
2013 2013-09-19 0.03 6.14 < 0.03
2013 2013-09-19 0.03 6.14 < 0.03
2013 2013-09-19 0.03 6.14 < 0.03
2013 2013-09-19 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
2014 2014-04-08 0.1 0.0103 < 0.1
2014 2014-04-08 0.1 0.0103 < 0.1
2014 2014-04-08 0.1 0.0103 < 0.1
2014 2014-04-08 0.1 0.0103 < 0.1
2014 2014-04-08 0.1 0.0103 < 0.1
2014 2014-04-08 0.1 0.0103 < 0.1
2013 2013-10-02 0.1 0.0103 < 0.1
2013 2013-09-19 0.1 0.0103 < 0.1
2013 2013-09-19 0.1 0.0103 < 0.1
2013 2013-09-19 0.1 0.0103 < 0.1
2013 2013-09-19 0.1 0.0103 < 0.1
2013 2013-09-19 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
CA49119 lead 2013-01-01 2015-12-31 0.0013mg/L
CA38425 lead 2010-01-01 2012-12-31 0mg/L
151001909223LT4 lead 2009-01-01 2009-12-31 0.00045mg/L
151001909254LT3 lead 2009-01-01 2009-12-31 0.001mg/L

Violations


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

Compliance Dates Rule Violation Type Contaminant Name Status
2015-12-01 - 2015-12-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
2014-04-01 - 2014-06-30 Stage 2 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) TTHM Known
2014-04-01 - 2014-06-30 Stage 2 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Total Haloacetic Acids (HAA5) Known
2012-11-01 - 2012-11-30 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
2012-04-01 - 2012-06-30 Arsenic Maximum Contaminant Level Violation, Average Arsenic Returned to Compliance
2012-01-01 - 2012-03-31 Arsenic Maximum Contaminant Level Violation, Average Arsenic Returned to Compliance
2011-10-01 - 2011-12-31 Arsenic Maximum Contaminant Level Violation, Average Arsenic Returned to Compliance
2011-07-01 - 2011-09-30 Arsenic Maximum Contaminant Level Violation, Average Arsenic Returned to Compliance
2011-04-01 - 2011-06-30 Arsenic Maximum Contaminant Level Violation, Average Arsenic Returned to Compliance
2011-01-01 - 2011-03-31 Arsenic Maximum Contaminant Level Violation, Average Arsenic Returned to Compliance
2010-10-01 - 2010-12-31 Arsenic Maximum Contaminant Level Violation, Average Arsenic Returned to Compliance
2009-01-01 - 2009-03-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM Known
1993-06-30 - 2000-03-01 Lead and Copper Rule Initial Tap Sampling for Pb and Cu Lead and Copper Rule Returned to Compliance
1998-12-01 - 1998-12-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
1997-01-01 - 1997-01-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
1994-07-01 - 1994-07-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
1994-01-01 - 1994-01-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
1993-03-01 - 1993-03-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
1993-01-01 - 1993-01-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
1992-12-01 - 1992-12-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) 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.