Public Water System: Nipomo Comm Services Dist

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: CA4010026
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Surface water purchased
Population Served: 12,886
Contact Information
IGLESIAS, MARIO
IGLESIAS, MARIO
148 South Wilson Street
NIPOMO, CA 93444

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   (1) 2014   (1) 2015   (0)
molybdenum molybdenum

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).

molybdenum
Is this in your home's pipes?

Year Test Date MRL HRL Test Result
2014 2014-06-23 1 40 5.1
2014 2014-06-23 1 40 75
2014 2014-06-23 1 40 7.7
2014 2014-06-23 1 40 8.1
2014 2014-06-23 1 40 12
2014 2014-06-23 1 40 7.4
2014 2014-06-23 1 40 10
2014 2014-06-23 1 40 5.8
2014 2014-06-23 1 40 7.8
2014 2014-04-09 1 40 6.6
2013 2013-12-16 1 40 190
2013 2013-12-16 1 40 6.4
2013 2013-12-16 1 40 1.8
2013 2013-12-16 1 40 12
2013 2013-12-16 1 40 8.4
2013 2013-12-16 1 40 7.6
2013 2013-12-16 1 40 3.4
2013 2013-12-16 1 40 10
2013 2013-12-16 1 40 8
2013 2013-12-16 1 40 < 1

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
PFOA 0.02 0.07 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-07-29 0.02 0.07 < 0.02
2014 2014-06-23 0.02 0.07 < 0.02
2014 2014-06-23 0.02 0.07 < 0.02
2014 2014-06-23 0.02 0.07 < 0.02
2014 2014-06-23 0.02 0.07 < 0.02
2014 2014-06-23 0.02 0.07 < 0.02
2014 2014-06-23 0.02 0.07 < 0.02
2014 2014-04-09 0.02 0.07 < 0.02
2013 2013-12-16 0.02 0.07 < 0.02
2013 2013-12-16 0.02 0.07 < 0.02
2013 2013-12-16 0.02 0.07 < 0.02
2013 2013-12-16 0.02 0.07 < 0.02
2013 2013-12-16 0.02 0.07 < 0.02
2013 2013-12-16 0.02 0.07 < 0.02
2013 2013-12-16 0.02 0.07 < 0.02
2013 2013-12-16 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
2014 2014-06-23 0.03 6.14 < 0.03
2014 2014-06-23 0.03 6.14 < 0.03
2014 2014-06-23 0.03 6.14 < 0.03
2014 2014-06-23 0.03 6.14 < 0.03
2014 2014-06-23 0.03 6.14 < 0.03
2014 2014-06-23 0.03 6.14 < 0.03
2014 2014-06-23 0.03 6.14 < 0.03
2014 2014-04-09 0.03 6.14 < 0.03
2013 2013-12-16 0.03 6.14 < 0.03
2013 2013-12-16 0.03 6.14 < 0.03
2013 2013-12-16 0.03 6.14 < 0.03
2013 2013-12-16 0.03 6.14 < 0.03
2013 2013-12-16 0.03 6.14 < 0.03
2013 2013-12-16 0.03 6.14 < 0.03
2013 2013-12-16 0.03 6.14 < 0.03
2013 2013-12-16 0.03 6.14 < 0.03
Halon 1011 0.06 90 < 0.06 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 0.06 90 < 0.06
2014 2014-06-23 0.06 90 < 0.06
2014 2014-06-23 0.06 90 < 0.06
2014 2014-06-23 0.06 90 < 0.06
2014 2014-06-23 0.06 90 < 0.06
2014 2014-06-23 0.06 90 < 0.06
2014 2014-06-23 0.06 90 < 0.06
2014 2014-04-09 0.06 90 < 0.06
2013 2013-12-16 0.06 90 < 0.06
2013 2013-12-16 0.06 90 < 0.06
2013 2013-12-16 0.06 90 < 0.06
2013 2013-12-16 0.06 90 < 0.06
2013 2013-12-16 0.06 90 < 0.06
2013 2013-12-16 0.06 90 < 0.06
2013 2013-12-16 0.06 90 < 0.06
2013 2013-12-16 0.06 90 < 0.06
chromium-6 0.03 0 0.8524 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 0.03 0 0.4
2014 2014-06-23 0.03 0 0.048
2014 2014-06-23 0.03 0 0.88
2014 2014-06-23 0.03 0 0.93
2014 2014-06-23 0.03 0 1.1
2014 2014-06-23 0.03 0 1.2
2014 2014-06-23 0.03 0 0.87
2014 2014-06-23 0.03 0 0.34
2014 2014-06-23 0.03 0 0.9
2014 2014-04-09 0.03 0 2.8
2013 2013-12-16 0.03 0 < 0.03
2013 2013-12-16 0.03 0 0.81
2013 2013-12-16 0.03 0 0.95
2013 2013-12-16 0.03 0 1.3
2013 2013-12-16 0.03 0 1.4
2013 2013-12-16 0.03 0 0.19
2013 2013-12-16 0.03 0 1.1
2013 2013-12-16 0.03 0 1.1
2013 2013-12-16 0.03 0 0.57
2013 2013-12-16 0.03 0 0.16
PFNA 0.02 0 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-07-29 0.02 0 < 0.02
2014 2014-06-23 0.02 0 < 0.02
2014 2014-06-23 0.02 0 < 0.02
2014 2014-06-23 0.02 0 < 0.02
2014 2014-06-23 0.02 0 < 0.02
2014 2014-06-23 0.02 0 < 0.02
2014 2014-06-23 0.02 0 < 0.02
2014 2014-04-09 0.02 0 < 0.02
2013 2013-12-16 0.02 0 < 0.02
2013 2013-12-16 0.02 0 < 0.02
2013 2013-12-16 0.02 0 < 0.02
2013 2013-12-16 0.02 0 < 0.02
2013 2013-12-16 0.02 0 < 0.02
2013 2013-12-16 0.02 0 < 0.02
2013 2013-12-16 0.02 0 < 0.02
2013 2013-12-16 0.02 0 < 0.02
chlorate 20 210 43.25 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 20 210 < 20
2014 2014-06-23 20 210 < 20
2014 2014-06-23 20 210 95
2014 2014-06-23 20 210 100
2014 2014-06-23 20 210 55
2014 2014-06-23 20 210 100
2014 2014-06-23 20 210 66
2014 2014-06-23 20 210 83
2014 2014-06-23 20 210 70
2014 2014-04-09 20 210 < 20
2014 2014-04-09 20 210 < 20
2013 2013-12-16 20 210 < 20
2013 2013-12-16 20 210 < 20
2013 2013-12-16 20 210 71
2013 2013-12-16 20 210 29
2013 2013-12-16 20 210 56
2013 2013-12-16 20 210 72
2013 2013-12-16 20 210 < 20
2013 2013-12-16 20 210 48
2013 2013-12-16 20 210 20
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 1 70 < 1
2014 2014-06-23 1 70 < 1
2014 2014-06-23 1 70 < 1
2014 2014-06-23 1 70 < 1
2014 2014-06-23 1 70 < 1
2014 2014-06-23 1 70 < 1
2014 2014-06-23 1 70 < 1
2014 2014-06-23 1 70 < 1
2014 2014-06-23 1 70 < 1
2014 2014-04-09 1 70 < 1
2013 2013-12-16 1 70 < 1
2013 2013-12-16 1 70 < 1
2013 2013-12-16 1 70 < 1
2013 2013-12-16 1 70 < 1
2013 2013-12-16 1 70 < 1
2013 2013-12-16 1 70 < 1
2013 2013-12-16 1 70 < 1
2013 2013-12-16 1 70 < 1
2013 2013-12-16 1 70 < 1
2013 2013-12-16 1 70 < 1
vanadium 0.2 21 7.86 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 0.2 21 8
2014 2014-06-23 0.2 21 1.7
2014 2014-06-23 0.2 21 11
2014 2014-06-23 0.2 21 11
2014 2014-06-23 0.2 21 11
2014 2014-06-23 0.2 21 12
2014 2014-06-23 0.2 21 10
2014 2014-06-23 0.2 21 2.8
2014 2014-06-23 0.2 21 13
2014 2014-04-09 0.2 21 8.7
2013 2013-12-16 0.2 21 2.2
2013 2013-12-16 0.2 21 4.5
2013 2013-12-16 0.2 21 2.8
2013 2013-12-16 0.2 21 8.8
2013 2013-12-16 0.2 21 11
2013 2013-12-16 0.2 21 9.4
2013 2013-12-16 0.2 21 5.1
2013 2013-12-16 0.2 21 9.2
2013 2013-12-16 0.2 21 12
2013 2013-12-16 0.2 21 3
1,4-dioxane 0.07 0.35 < 0.07 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 0.07 0.35 < 0.07
2014 2014-06-23 0.07 0.35 < 0.07
2014 2014-06-23 0.07 0.35 < 0.07
2014 2014-06-23 0.07 0.35 < 0.07
2014 2014-06-23 0.07 0.35 < 0.07
2014 2014-06-23 0.07 0.35 < 0.07
2014 2014-06-23 0.07 0.35 < 0.07
2014 2014-04-09 0.07 0.35 < 0.07
2013 2013-12-16 0.07 0.35 < 0.07
2013 2013-12-16 0.07 0.35 < 0.07
2013 2013-12-16 0.07 0.35 < 0.07
2013 2013-12-16 0.07 0.35 < 0.07
2013 2013-12-16 0.07 0.35 < 0.07
2013 2013-12-16 0.07 0.35 < 0.07
2013 2013-12-16 0.07 0.35 < 0.07
2013 2013-12-16 0.07 0.35 < 0.07
chloromethane 0.2 2.69 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 0.2 2.69 < 0.2
2014 2014-06-23 0.2 2.69 < 0.2
2014 2014-06-23 0.2 2.69 < 0.2
2014 2014-06-23 0.2 2.69 < 0.2
2014 2014-06-23 0.2 2.69 < 0.2
2014 2014-06-23 0.2 2.69 < 0.2
2014 2014-06-23 0.2 2.69 < 0.2
2014 2014-04-09 0.2 2.69 < 0.2
2013 2013-12-16 0.2 2.69 < 0.2
2013 2013-12-16 0.2 2.69 < 0.2
2013 2013-12-16 0.2 2.69 < 0.2
2013 2013-12-16 0.2 2.69 < 0.2
2013 2013-12-16 0.2 2.69 < 0.2
2013 2013-12-16 0.2 2.69 < 0.2
2013 2013-12-16 0.2 2.69 < 0.2
2013 2013-12-16 0.2 2.69 < 0.2
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-07-29 0.09 0 < 0.09
2014 2014-06-23 0.09 0 < 0.09
2014 2014-06-23 0.09 0 < 0.09
2014 2014-06-23 0.09 0 < 0.09
2014 2014-06-23 0.09 0 < 0.09
2014 2014-06-23 0.09 0 < 0.09
2014 2014-06-23 0.09 0 < 0.09
2014 2014-04-09 0.09 0 < 0.09
2013 2013-12-16 0.09 0 < 0.09
2013 2013-12-16 0.09 0 < 0.09
2013 2013-12-16 0.09 0 < 0.09
2013 2013-12-16 0.09 0 < 0.09
2013 2013-12-16 0.09 0 < 0.09
2013 2013-12-16 0.09 0 < 0.09
2013 2013-12-16 0.09 0 < 0.09
2013 2013-12-16 0.09 0 < 0.09
PFHpA 0.01 0 < 0.01 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-07-29 0.01 0 < 0.01
2014 2014-06-23 0.01 0 < 0.01
2014 2014-06-23 0.01 0 < 0.01
2014 2014-06-23 0.01 0 < 0.01
2014 2014-06-23 0.01 0 < 0.01
2014 2014-06-23 0.01 0 < 0.01
2014 2014-06-23 0.01 0 < 0.01
2014 2014-04-09 0.01 0 < 0.01
2013 2013-12-16 0.01 0 < 0.01
2013 2013-12-16 0.01 0 < 0.01
2013 2013-12-16 0.01 0 < 0.01
2013 2013-12-16 0.01 0 < 0.01
2013 2013-12-16 0.01 0 < 0.01
2013 2013-12-16 0.01 0 < 0.01
2013 2013-12-16 0.01 0 < 0.01
2013 2013-12-16 0.01 0 < 0.01
1,3-butadiene 0.1 0.0103 < 0.1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 0.1 0.0103 < 0.1
2014 2014-06-23 0.1 0.0103 < 0.1
2014 2014-06-23 0.1 0.0103 < 0.1
2014 2014-06-23 0.1 0.0103 < 0.1
2014 2014-06-23 0.1 0.0103 < 0.1
2014 2014-06-23 0.1 0.0103 < 0.1
2014 2014-06-23 0.1 0.0103 < 0.1
2014 2014-04-09 0.1 0.0103 < 0.1
2013 2013-12-16 0.1 0.0103 < 0.1
2013 2013-12-16 0.1 0.0103 < 0.1
2013 2013-12-16 0.1 0.0103 < 0.1
2013 2013-12-16 0.1 0.0103 < 0.1
2013 2013-12-16 0.1 0.0103 < 0.1
2013 2013-12-16 0.1 0.0103 < 0.1
2013 2013-12-16 0.1 0.0103 < 0.1
2013 2013-12-16 0.1 0.0103 < 0.1
HCFC-22 0.08 0 < 0.08 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 0.08 0 < 0.08
2014 2014-06-23 0.08 0 < 0.08
2014 2014-06-23 0.08 0 < 0.08
2014 2014-06-23 0.08 0 < 0.08
2014 2014-06-23 0.08 0 < 0.08
2014 2014-06-23 0.08 0 < 0.08
2014 2014-06-23 0.08 0 < 0.08
2014 2014-04-09 0.08 0 < 0.08
2013 2013-12-16 0.08 0 < 0.08
2013 2013-12-16 0.08 0 < 0.08
2013 2013-12-16 0.08 0 < 0.08
2013 2013-12-16 0.08 0 < 0.08
2013 2013-12-16 0.08 0 < 0.08
2013 2013-12-16 0.08 0 < 0.08
2013 2013-12-16 0.08 0 < 0.08
2013 2013-12-16 0.08 0 < 0.08
PFHxS 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-07-29 0.03 0 < 0.03
2014 2014-06-23 0.03 0 < 0.03
2014 2014-06-23 0.03 0 < 0.03
2014 2014-06-23 0.03 0 < 0.03
2014 2014-06-23 0.03 0 < 0.03
2014 2014-06-23 0.03 0 < 0.03
2014 2014-06-23 0.03 0 < 0.03
2014 2014-04-09 0.03 0 < 0.03
2013 2013-12-16 0.03 0 < 0.03
2013 2013-12-16 0.03 0 < 0.03
2013 2013-12-16 0.03 0 < 0.03
2013 2013-12-16 0.03 0 < 0.03
2013 2013-12-16 0.03 0 < 0.03
2013 2013-12-16 0.03 0 < 0.03
2013 2013-12-16 0.03 0 < 0.03
2013 2013-12-16 0.03 0 < 0.03
PFOS 0.04 0.07 < 0.04 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-07-29 0.04 0.07 < 0.04
2014 2014-06-23 0.04 0.07 < 0.04
2014 2014-06-23 0.04 0.07 < 0.04
2014 2014-06-23 0.04 0.07 < 0.04
2014 2014-06-23 0.04 0.07 < 0.04
2014 2014-06-23 0.04 0.07 < 0.04
2014 2014-06-23 0.04 0.07 < 0.04
2014 2014-04-09 0.04 0.07 < 0.04
2013 2013-12-16 0.04 0.07 < 0.04
2013 2013-12-16 0.04 0.07 < 0.04
2013 2013-12-16 0.04 0.07 < 0.04
2013 2013-12-16 0.04 0.07 < 0.04
2013 2013-12-16 0.04 0.07 < 0.04
2013 2013-12-16 0.04 0.07 < 0.04
2013 2013-12-16 0.04 0.07 < 0.04
2013 2013-12-16 0.04 0.07 < 0.04
strontium 0.3 1500 374.5 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 0.3 1500 320
2014 2014-06-23 0.3 1500 470
2014 2014-06-23 0.3 1500 430
2014 2014-06-23 0.3 1500 360
2014 2014-06-23 0.3 1500 300
2014 2014-06-23 0.3 1500 290
2014 2014-06-23 0.3 1500 480
2014 2014-06-23 0.3 1500 290
2014 2014-06-23 0.3 1500 510
2014 2014-04-09 0.3 1500 250
2013 2013-12-16 0.3 1500 460
2013 2013-12-16 0.3 1500 280
2013 2013-12-16 0.3 1500 210
2013 2013-12-16 0.3 1500 490
2013 2013-12-16 0.3 1500 420
2013 2013-12-16 0.3 1500 380
2013 2013-12-16 0.3 1500 300
2013 2013-12-16 0.3 1500 470
2013 2013-12-16 0.3 1500 520
2013 2013-12-16 0.3 1500 260
1,2,3-trichloropropane 0.03 0.0004 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 0.03 0.0004 < 0.03
2014 2014-06-23 0.03 0.0004 < 0.03
2014 2014-06-23 0.03 0.0004 < 0.03
2014 2014-06-23 0.03 0.0004 < 0.03
2014 2014-06-23 0.03 0.0004 < 0.03
2014 2014-06-23 0.03 0.0004 < 0.03
2014 2014-06-23 0.03 0.0004 < 0.03
2014 2014-04-09 0.03 0.0004 < 0.03
2013 2013-12-16 0.03 0.0004 < 0.03
2013 2013-12-16 0.03 0.0004 < 0.03
2013 2013-12-16 0.03 0.0004 < 0.03
2013 2013-12-16 0.03 0.0004 < 0.03
2013 2013-12-16 0.03 0.0004 < 0.03
2013 2013-12-16 0.03 0.0004 < 0.03
2013 2013-12-16 0.03 0.0004 < 0.03
2013 2013-12-16 0.03 0.0004 < 0.03
bromomethane 0.2 140 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 0.2 140 < 0.2
2014 2014-06-23 0.2 140 < 0.2
2014 2014-06-23 0.2 140 < 0.2
2014 2014-06-23 0.2 140 < 0.2
2014 2014-06-23 0.2 140 < 0.2
2014 2014-06-23 0.2 140 < 0.2
2014 2014-06-23 0.2 140 < 0.2
2014 2014-04-09 0.2 140 < 0.2
2013 2013-12-16 0.2 140 < 0.2
2013 2013-12-16 0.2 140 < 0.2
2013 2013-12-16 0.2 140 < 0.2
2013 2013-12-16 0.2 140 < 0.2
2013 2013-12-16 0.2 140 < 0.2
2013 2013-12-16 0.2 140 < 0.2
2013 2013-12-16 0.2 140 < 0.2
2013 2013-12-16 0.2 140 < 0.2
chromium 0.2 100 0.9685 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-06-23 0.2 100 0.54
2014 2014-06-23 0.2 100 0.81
2014 2014-06-23 0.2 100 1
2014 2014-06-23 0.2 100 1.1
2014 2014-06-23 0.2 100 1.2
2014 2014-06-23 0.2 100 1.4
2014 2014-06-23 0.2 100 1
2014 2014-06-23 0.2 100 0.44
2014 2014-06-23 0.2 100 1.1
2014 2014-04-09 0.2 100 3
2013 2013-12-16 0.2 100 0.24
2013 2013-12-16 0.2 100 0.79
2013 2013-12-16 0.2 100 0.88
2013 2013-12-16 0.2 100 0.43
2013 2013-12-16 0.2 100 1.1
2013 2013-12-16 0.2 100 1.3
2013 2013-12-16 0.2 100 0.44
2013 2013-12-16 0.2 100 0.92
2013 2013-12-16 0.2 100 1.1
2013 2013-12-16 0.2 100 0.58

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
CA49577 lead 2013-01-01 2015-12-31 0.0024mg/L
CA37488 lead 2010-01-01 2012-12-31 0.0012mg/L
401002612255L lead 2012-01-01 2012-12-31 0.0012mg/L
401002609218LT4 lead 2009-01-01 2009-12-31 0.0009mg/L
401002609218L lead 2009-01-01 2009-12-31 0.0009mg/L
401002609079L lead 2009-01-01 2009-12-31 0.005mg/L
401002609092L lead 2009-01-01 2009-12-31 0.005mg/L
401002609204C copper 2009-01-01 2009-12-31 1.5mg/L
401002609204L lead 2009-01-01 2009-12-31 0.005mg/L
401002609217L lead 2009-01-01 2009-12-31 0.005mg/L
401002608264L lead 2008-01-01 2008-12-31 0.0027mg/L

Violations


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

Compliance Dates Rule Violation Type Contaminant Name Status
2008-01-01 - 2008-01-31 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Known
2005-04-01 - 2005-04-30 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Known
2005-04-01 - 2005-04-30 Total Coliform Rule Monitoring, Repeat Minor (TCR) Coliform (TCR) Known
1994-11-01 - 1994-11-30 Total Coliform Rule Monitoring, Routine Minor (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.