City Of San Marcos 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: TX1050001
Type: Community water system
EPA Region: 06
Primary Source: Surface water
Population Served: 67,468 		Contact Information
THOMAIDES, JOHN
THOMAIDES, JOHN
630 HOPKINS ST
SAN MARCOS, TX 78666-6314
[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   (0) 2014   (1) 2015   (1) 2016   (0) 2017   (0) 2018   (9)
chlorate chlorate HAA5
HAA6Br
HAA9
1-butanol
2-methoxyethanol
2-propen-1-ol
butylated hydroxyanisole
o-toluidine
quinoline

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 7.152

HAA6Br

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-07 0 0.00 15.222

HAA9

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-07 0 0.00 18.612

chlorate

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2015 2015-06-10 20 210 < 20
2015 2015-06-10 20 210 210
2015 2015-06-10 20 210 100
2015 2015-06-10 20 210 < 20
2015 2015-06-10 20 210 < 20
2015 2015-06-10 20 210 < 20
2015 2015-06-10 20 210 210
2015 2015-06-10 20 210 100
2015 2015-06-10 20 210 < 20
2015 2015-06-10 20 210 220
2015 2015-03-11 20 210 < 20
2015 2015-03-11 20 210 230
2015 2015-03-11 20 210 200
2015 2015-03-11 20 210 45
2015 2015-03-11 20 210 < 20
2015 2015-03-11 20 210 < 20
2015 2015-03-11 20 210 < 20
2015 2015-03-11 20 210 < 20
2015 2015-03-11 20 210 27
2015 2015-03-11 20 210 210
2015 2015-03-11 20 210 110
2015 2015-03-11 20 210 48
2015 2015-03-11 20 210 45
2015 2015-03-11 20 210 220
2014 2014-12-03 20 210 < 20
2014 2014-12-03 20 210 270
2014 2014-12-03 20 210 85
2014 2014-12-03 20 210 52
2014 2014-12-03 20 210 < 20
2014 2014-12-03 20 210 < 20
2014 2014-12-03 20 210 41
2014 2014-12-03 20 210 140
2014 2014-12-03 20 210 53
2014 2014-12-03 20 210 140
2014 2014-09-10 20 210 < 20
2014 2014-09-10 20 210 310
2014 2014-09-10 20 210 77
2014 2014-09-10 20 210 63
2014 2014-09-10 20 210 49
2014 2014-09-10 20 210 < 20
2014 2014-09-10 20 210 < 20
2014 2014-09-10 20 210 < 20
2014 2014-09-10 20 210 < 20
2014 2014-09-10 20 210 200
2014 2014-09-10 20 210 280
2014 2014-09-10 20 210 66
2014 2014-09-10 20 210 300
2014 2014-09-10 20 210 1100

1-butanol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-04-18 2 0.00 < 2
2018 2018-03-06 2 0.00 < 2
2018 2018-03-06 2 0.00 < 2
2018 2018-03-06 2 0.00 < 2
2018 2018-03-06 2 0.00 < 2
2018 2018-03-06 2 0.00 < 2

2-methoxyethanol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-04-18 0.4 0.00 < 0.4
2018 2018-03-06 0.4 0.00 < 0.4
2018 2018-03-06 0.4 0.00 < 0.4
2018 2018-03-06 0.4 0.00 < 0.4
2018 2018-03-06 0.4 0.00 < 0.4
2018 2018-03-06 0.4 0.00 < 0.4

2-propen-1-ol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-04-18 0.5 0.00 < 0.5
2018 2018-03-06 0.5 0.00 < 0.5
2018 2018-03-06 0.5 0.00 < 0.5
2018 2018-03-06 0.5 0.00 < 0.5
2018 2018-03-06 0.5 0.00 < 0.5
2018 2018-03-06 0.5 0.00 < 0.5

butylated hydroxyanisole

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

o-toluidine

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

quinoline

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

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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 0.0756 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-23 0.2 100 0.27
2015 2015-09-23 0.2 100 0.33
2015 2015-09-23 0.2 100 0.25
2015 2015-09-23 0.2 100 0.26
2015 2015-09-23 0.2 100 0.33
2015 2015-09-23 0.2 100 0.33
2015 2015-09-23 0.2 100 0.23
2015 2015-09-23 0.2 100 0.23
2015 2015-09-23 0.2 100 0.26
2015 2015-09-23 0.2 100 0.29
2015 2015-06-10 0.2 100 < 0.2
2015 2015-06-10 0.2 100 < 0.2
2015 2015-06-10 0.2 100 < 0.2
2015 2015-06-10 0.2 100 < 0.2
2015 2015-06-10 0.2 100 < 0.2
2015 2015-06-10 0.2 100 < 0.2
2015 2015-06-10 0.2 100 < 0.2
2015 2015-06-10 0.2 100 < 0.2
2015 2015-06-10 0.2 100 0.39
2015 2015-06-10 0.2 100 < 0.2
2015 2015-03-11 0.2 100 < 0.2
2015 2015-03-11 0.2 100 < 0.2
2015 2015-03-11 0.2 100 0.23
2015 2015-03-11 0.2 100 < 0.2
2015 2015-03-11 0.2 100 < 0.2
2015 2015-03-11 0.2 100 < 0.2
2015 2015-03-11 0.2 100 < 0.2
2015 2015-03-11 0.2 100 < 0.2
2015 2015-03-11 0.2 100 < 0.2
2015 2015-03-11 0.2 100 0.23
2015 2015-03-11 0.2 100 < 0.2
2015 2015-03-11 0.2 100 < 0.2
2015 2015-03-11 0.2 100 < 0.2
2015 2015-03-11 0.2 100 < 0.2
2014 2014-12-03 0.2 100 < 0.2
2014 2014-12-03 0.2 100 < 0.2
2014 2014-12-03 0.2 100 < 0.2
2014 2014-12-03 0.2 100 < 0.2
2014 2014-12-03 0.2 100 < 0.2
2014 2014-12-03 0.2 100 < 0.2
2014 2014-12-03 0.2 100 < 0.2
2014 2014-12-03 0.2 100 < 0.2
2014 2014-12-03 0.2 100 < 0.2
2014 2014-12-03 0.2 100 < 0.2
2014 2014-09-10 0.2 100 < 0.2
2014 2014-09-10 0.2 100 < 0.2
2014 2014-09-10 0.2 100 < 0.2
2014 2014-09-10 0.2 100 < 0.2
[+] Expand Test Data
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-23 1 70 < 1
2015 2015-09-23 1 70 < 1
2015 2015-09-23 1 70 < 1
2015 2015-09-23 1 70 < 1
2015 2015-09-23 1 70 < 1
2015 2015-09-23 1 70 < 1
2015 2015-09-23 1 70 < 1
2015 2015-09-23 1 70 < 1
2015 2015-09-23 1 70 < 1
2015 2015-09-23 1 70 < 1
2015 2015-06-10 1 70 < 1
2015 2015-06-10 1 70 < 1
2015 2015-06-10 1 70 < 1
2015 2015-06-10 1 70 < 1
2015 2015-06-10 1 70 < 1
2015 2015-06-10 1 70 < 1
2015 2015-06-10 1 70 < 1
2015 2015-06-10 1 70 < 1
2015 2015-06-10 1 70 < 1
2015 2015-06-10 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2015 2015-03-11 1 70 < 1
2014 2014-12-03 1 70 < 1
2014 2014-12-03 1 70 < 1
2014 2014-12-03 1 70 < 1
2014 2014-12-03 1 70 < 1
2014 2014-12-03 1 70 < 1
2014 2014-12-03 1 70 < 1
2014 2014-12-03 1 70 < 1
2014 2014-12-03 1 70 < 1
2014 2014-12-03 1 70 < 1
2014 2014-12-03 1 70 < 1
2014 2014-09-10 1 70 < 1
2014 2014-09-10 1 70 < 1
2014 2014-09-10 1 70 < 1
2014 2014-09-10 1 70 < 1
[+] Expand Test Data
molybdenum 1 40 0.1854 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-23 1 40 < 1
2015 2015-09-23 1 40 < 1
2015 2015-09-23 1 40 < 1
2015 2015-09-23 1 40 < 1
2015 2015-09-23 1 40 < 1
2015 2015-09-23 1 40 < 1
2015 2015-09-23 1 40 < 1
2015 2015-09-23 1 40 < 1
2015 2015-09-23 1 40 < 1
2015 2015-09-23 1 40 < 1
2015 2015-06-10 1 40 1.2
2015 2015-06-10 1 40 < 1
2015 2015-06-10 1 40 < 1
2015 2015-06-10 1 40 1.2
2015 2015-06-10 1 40 1.1
2015 2015-06-10 1 40 1.1
2015 2015-06-10 1 40 < 1
2015 2015-06-10 1 40 < 1
2015 2015-06-10 1 40 1.1
2015 2015-06-10 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2015 2015-03-11 1 40 < 1
2014 2014-12-03 1 40 1.1
2014 2014-12-03 1 40 < 1
2014 2014-12-03 1 40 < 1
2014 2014-12-03 1 40 < 1
2014 2014-12-03 1 40 1.1
2014 2014-12-03 1 40 < 1
2014 2014-12-03 1 40 < 1
2014 2014-12-03 1 40 < 1
2014 2014-12-03 1 40 < 1
2014 2014-12-03 1 40 < 1
2014 2014-09-10 1 40 1
2014 2014-09-10 1 40 < 1
2014 2014-09-10 1 40 < 1
2014 2014-09-10 1 40 < 1
[+] Expand Test Data
strontium 0.3 1500 541.0417 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-12-01 0.3 1500 600
2015 2015-09-23 0.3 1500 490
2015 2015-09-23 0.3 1500 480
2015 2015-09-23 0.3 1500 470
2015 2015-09-23 0.3 1500 450
2015 2015-09-23 0.3 1500 490
2015 2015-09-23 0.3 1500 510
2015 2015-09-23 0.3 1500 490
2015 2015-09-23 0.3 1500 440
2015 2015-09-23 0.3 1500 610
2015 2015-06-10 0.3 1500 320
2015 2015-06-10 0.3 1500 500
2015 2015-06-10 0.3 1500 480
2015 2015-06-10 0.3 1500 320
2015 2015-06-10 0.3 1500 290
2015 2015-06-10 0.3 1500 290
2015 2015-06-10 0.3 1500 360
2015 2015-06-10 0.3 1500 450
2015 2015-06-10 0.3 1500 340
2015 2015-06-10 0.3 1500 480
2015 2015-03-11 0.3 1500 680
2015 2015-03-11 0.3 1500 610
2015 2015-03-11 0.3 1500 640
2015 2015-03-11 0.3 1500 800
2015 2015-03-11 0.3 1500 690
2015 2015-03-11 0.3 1500 650
2015 2015-03-11 0.3 1500 670
2015 2015-03-11 0.3 1500 670
2015 2015-03-11 0.3 1500 660
2015 2015-03-11 0.3 1500 660
2015 2015-03-11 0.3 1500 610
2015 2015-03-11 0.3 1500 800
2015 2015-03-11 0.3 1500 780
2015 2015-03-11 0.3 1500 650
2014 2014-12-03 0.3 1500 460
2014 2014-12-03 0.3 1500 590
2014 2014-12-03 0.3 1500 490
2014 2014-12-03 0.3 1500 490
2014 2014-12-03 0.3 1500 470
2014 2014-12-03 0.3 1500 500
2014 2014-12-03 0.3 1500 490
2014 2014-12-03 0.3 1500 530
2014 2014-12-03 0.3 1500 520
2014 2014-12-03 0.3 1500 560
2014 2014-09-10 0.3 1500 590
2014 2014-09-10 0.3 1500 610
2014 2014-09-10 0.3 1500 610
2014 2014-09-10 0.3 1500 630
[+] Expand Test Data
vanadium 0.2 21 2.275 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-23 0.2 21 2
2015 2015-09-23 0.2 21 1.9
2015 2015-09-23 0.2 21 1.8
2015 2015-09-23 0.2 21 1.6
2015 2015-09-23 0.2 21 2.3
2015 2015-09-23 0.2 21 2.2
2015 2015-09-23 0.2 21 2.1
2015 2015-09-23 0.2 21 1.8
2015 2015-09-23 0.2 21 2
2015 2015-09-23 0.2 21 2.7
2015 2015-06-10 0.2 21 1.8
2015 2015-06-10 0.2 21 2.7
2015 2015-06-10 0.2 21 2.2
2015 2015-06-10 0.2 21 1.7
2015 2015-06-10 0.2 21 1.6
2015 2015-06-10 0.2 21 1.5
2015 2015-06-10 0.2 21 1.8
2015 2015-06-10 0.2 21 1.9
2015 2015-06-10 0.2 21 2.5
2015 2015-06-10 0.2 21 2.5
2015 2015-03-11 0.2 21 2.1
2015 2015-03-11 0.2 21 2.7
2015 2015-03-11 0.2 21 2.5
2015 2015-03-11 0.2 21 2.4
2015 2015-03-11 0.2 21 2.1
2015 2015-03-11 0.2 21 2
2015 2015-03-11 0.2 21 2.1
2015 2015-03-11 0.2 21 2.2
2015 2015-03-11 0.2 21 2.1
2015 2015-03-11 0.2 21 2.5
2015 2015-03-11 0.2 21 2.3
2015 2015-03-11 0.2 21 2.4
2015 2015-03-11 0.2 21 2.3
2015 2015-03-11 0.2 21 3.1
2014 2014-12-03 0.2 21 2.4
2014 2014-12-03 0.2 21 3
2014 2014-12-03 0.2 21 2.4
2014 2014-12-03 0.2 21 2.5
2014 2014-12-03 0.2 21 2.4
2014 2014-12-03 0.2 21 2.2
2014 2014-12-03 0.2 21 2.3
2014 2014-12-03 0.2 21 2.3
2014 2014-12-03 0.2 21 2.5
2014 2014-12-03 0.2 21 2.9
2014 2014-09-10 0.2 21 2.6
2014 2014-09-10 0.2 21 3
2014 2014-09-10 0.2 21 2.8
2014 2014-09-10 0.2 21 2.5
[+] Expand Test Data
chromium-6 0.03 0 0.0782 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-06-10 0.03 0 < 0.03
2015 2015-06-10 0.03 0 0.1
2015 2015-06-10 0.03 0 0.16
2015 2015-06-10 0.03 0 < 0.03
2015 2015-06-10 0.03 0 < 0.03
2015 2015-06-10 0.03 0 < 0.03
2015 2015-06-10 0.03 0 0.06
2015 2015-06-10 0.03 0 0.15
2015 2015-06-10 0.03 0 0.04
2015 2015-06-10 0.03 0 0.1
2015 2015-03-11 0.03 0 0.1
2015 2015-03-11 0.03 0 0.096
2015 2015-03-11 0.03 0 0.17
2015 2015-03-11 0.03 0 0.1
2015 2015-03-11 0.03 0 0.09
2015 2015-03-11 0.03 0 0.097
2015 2015-03-11 0.03 0 0.079
2015 2015-03-11 0.03 0 0.097
2015 2015-03-11 0.03 0 0.085
2015 2015-03-11 0.03 0 0.17
2015 2015-03-11 0.03 0 0.098
2015 2015-03-11 0.03 0 0.094
2015 2015-03-11 0.03 0 0.079
2015 2015-03-11 0.03 0 0.096
2014 2014-12-03 0.03 0 0.071
2014 2014-12-03 0.03 0 0.11
2014 2014-12-03 0.03 0 0.1
2014 2014-12-03 0.03 0 0.096
2014 2014-12-03 0.03 0 0.068
2014 2014-12-03 0.03 0 0.066
2014 2014-12-03 0.03 0 0.074
2014 2014-12-03 0.03 0 0.1
2014 2014-12-03 0.03 0 0.099
2014 2014-12-03 0.03 0 0.1
2014 2014-10-29 0.03 0 < 0.03
2014 2014-10-29 0.03 0 0.11
2014 2014-10-29 0.03 0 0.038
2014 2014-10-29 0.03 0 0.036
2014 2014-10-29 0.03 0 0.042
2014 2014-10-29 0.03 0 0.039
2014 2014-10-29 0.03 0 0.034
2014 2014-10-29 0.03 0 0.037
2014 2014-10-29 0.03 0 0.034
2014 2014-10-29 0.03 0 0.084
2014 2014-10-29 0.03 0 0.11
2014 2014-10-29 0.03 0 0.048
2014 2014-10-29 0.03 0 0.077
2014 2014-10-29 0.03 0 0.12
[+] Expand Test Data
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-06-25 0.03 6.14 < 0.03
2015 2015-06-10 0.03 6.14 < 0.03
2015 2015-06-10 0.03 6.14 < 0.03
2015 2015-06-10 0.03 6.14 < 0.03
2015 2015-06-10 0.03 6.14 < 0.03
2015 2015-03-11 0.03 6.14 < 0.03
2015 2015-03-11 0.03 6.14 < 0.03
2015 2015-03-11 0.03 6.14 < 0.03
2015 2015-03-11 0.03 6.14 < 0.03
2015 2015-03-11 0.03 6.14 < 0.03
2015 2015-03-11 0.03 6.14 < 0.03
2015 2015-03-11 0.03 6.14 < 0.03
2014 2014-12-03 0.03 6.14 < 0.03
2014 2014-12-03 0.03 6.14 < 0.03
2014 2014-12-03 0.03 6.14 < 0.03
2014 2014-12-03 0.03 6.14 < 0.03
2014 2014-12-03 0.03 6.14 < 0.03
2014 2014-09-10 0.03 6.14 < 0.03
2014 2014-09-10 0.03 6.14 < 0.03
2014 2014-09-10 0.03 6.14 < 0.03
2014 2014-09-10 0.03 6.14 < 0.03
2014 2014-09-10 0.03 6.14 < 0.03
2014 2014-09-10 0.03 6.14 < 0.03
2014 2014-09-10 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
2015 2015-06-25 0.03 0.0004 < 0.03
2015 2015-06-10 0.03 0.0004 < 0.03
2015 2015-06-10 0.03 0.0004 < 0.03
2015 2015-06-10 0.03 0.0004 < 0.03
2015 2015-06-10 0.03 0.0004 < 0.03
2015 2015-03-11 0.03 0.0004 < 0.03
2015 2015-03-11 0.03 0.0004 < 0.03
2015 2015-03-11 0.03 0.0004 < 0.03
2015 2015-03-11 0.03 0.0004 < 0.03
2015 2015-03-11 0.03 0.0004 < 0.03
2015 2015-03-11 0.03 0.0004 < 0.03
2015 2015-03-11 0.03 0.0004 < 0.03
2014 2014-12-03 0.03 0.0004 < 0.03
2014 2014-12-03 0.03 0.0004 < 0.03
2014 2014-12-03 0.03 0.0004 < 0.03
2014 2014-12-03 0.03 0.0004 < 0.03
2014 2014-12-03 0.03 0.0004 < 0.03
2014 2014-09-10 0.03 0.0004 < 0.03
2014 2014-09-10 0.03 0.0004 < 0.03
2014 2014-09-10 0.03 0.0004 < 0.03
2014 2014-09-10 0.03 0.0004 < 0.03
2014 2014-09-10 0.03 0.0004 < 0.03
2014 2014-09-10 0.03 0.0004 < 0.03
2014 2014-09-10 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
2015 2015-06-25 0.1 0.0103 < 0.1
2015 2015-06-10 0.1 0.0103 < 0.1
2015 2015-06-10 0.1 0.0103 < 0.1
2015 2015-06-10 0.1 0.0103 < 0.1
2015 2015-06-10 0.1 0.0103 < 0.1
2015 2015-03-11 0.1 0.0103 < 0.1
2015 2015-03-11 0.1 0.0103 < 0.1
2015 2015-03-11 0.1 0.0103 < 0.1
2015 2015-03-11 0.1 0.0103 < 0.1
2015 2015-03-11 0.1 0.0103 < 0.1
2015 2015-03-11 0.1 0.0103 < 0.1
2015 2015-03-11 0.1 0.0103 < 0.1
2014 2014-12-03 0.1 0.0103 < 0.1
2014 2014-12-03 0.1 0.0103 < 0.1
2014 2014-12-03 0.1 0.0103 < 0.1
2014 2014-12-03 0.1 0.0103 < 0.1
2014 2014-12-03 0.1 0.0103 < 0.1
2014 2014-09-10 0.1 0.0103 < 0.1
2014 2014-09-10 0.1 0.0103 < 0.1
2014 2014-09-10 0.1 0.0103 < 0.1
2014 2014-09-10 0.1 0.0103 < 0.1
2014 2014-09-10 0.1 0.0103 < 0.1
2014 2014-09-10 0.1 0.0103 < 0.1
2014 2014-09-10 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
2015 2015-06-25 0.07 0.35 < 0.07
2015 2015-06-25 0.07 0.35 < 0.07
2015 2015-06-25 0.07 0.35 < 0.07
2015 2015-06-10 0.07 0.35 < 0.07
2015 2015-06-10 0.07 0.35 < 0.07
2015 2015-03-11 0.07 0.35 < 0.07
2015 2015-03-11 0.07 0.35 < 0.07
2015 2015-03-11 0.07 0.35 < 0.07
2015 2015-03-11 0.07 0.35 < 0.07
2015 2015-03-11 0.07 0.35 < 0.07
2015 2015-03-11 0.07 0.35 < 0.07
2015 2015-03-11 0.07 0.35 < 0.07
2014 2014-12-03 0.07 0.35 < 0.07
2014 2014-12-03 0.07 0.35 < 0.07
2014 2014-12-03 0.07 0.35 < 0.07
2014 2014-12-03 0.07 0.35 < 0.07
2014 2014-12-03 0.07 0.35 < 0.07
2014 2014-09-10 0.07 0.35 < 0.07
2014 2014-09-10 0.07 0.35 < 0.07
2014 2014-09-10 0.07 0.35 < 0.07
2014 2014-09-10 0.07 0.35 < 0.07
2014 2014-09-10 0.07 0.35 < 0.07
2014 2014-09-10 0.07 0.35 < 0.07
2014 2014-09-10 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
2015 2015-06-25 0.2 140 < 0.2
2015 2015-06-10 0.2 140 < 0.2
2015 2015-06-10 0.2 140 < 0.2
2015 2015-06-10 0.2 140 < 0.2
2015 2015-06-10 0.2 140 < 0.2
2015 2015-03-11 0.2 140 < 0.2
2015 2015-03-11 0.2 140 < 0.2
2015 2015-03-11 0.2 140 < 0.2
2015 2015-03-11 0.2 140 < 0.2
2015 2015-03-11 0.2 140 < 0.2
2015 2015-03-11 0.2 140 < 0.2
2015 2015-03-11 0.2 140 < 0.2
2014 2014-12-03 0.2 140 < 0.2
2014 2014-12-03 0.2 140 < 0.2
2014 2014-12-03 0.2 140 < 0.2
2014 2014-12-03 0.2 140 < 0.2
2014 2014-12-03 0.2 140 < 0.2
2014 2014-09-10 0.2 140 < 0.2
2014 2014-09-10 0.2 140 < 0.2
2014 2014-09-10 0.2 140 < 0.2
2014 2014-09-10 0.2 140 < 0.2
2014 2014-09-10 0.2 140 < 0.2
2014 2014-09-10 0.2 140 < 0.2
2014 2014-09-10 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
2015 2015-06-25 0.2 2.69 < 0.2
2015 2015-06-10 0.2 2.69 < 0.2
2015 2015-06-10 0.2 2.69 < 0.2
2015 2015-06-10 0.2 2.69 < 0.2
2015 2015-06-10 0.2 2.69 < 0.2
2015 2015-03-11 0.2 2.69 < 0.2
2015 2015-03-11 0.2 2.69 < 0.2
2015 2015-03-11 0.2 2.69 < 0.2
2015 2015-03-11 0.2 2.69 < 0.2
2015 2015-03-11 0.2 2.69 < 0.2
2015 2015-03-11 0.2 2.69 < 0.2
2015 2015-03-11 0.2 2.69 < 0.2
2014 2014-12-03 0.2 2.69 < 0.2
2014 2014-12-03 0.2 2.69 < 0.2
2014 2014-12-03 0.2 2.69 < 0.2
2014 2014-12-03 0.2 2.69 < 0.2
2014 2014-12-03 0.2 2.69 < 0.2
2014 2014-09-10 0.2 2.69 < 0.2
2014 2014-09-10 0.2 2.69 < 0.2
2014 2014-09-10 0.2 2.69 < 0.2
2014 2014-09-10 0.2 2.69 < 0.2
2014 2014-09-10 0.2 2.69 < 0.2
2014 2014-09-10 0.2 2.69 < 0.2
2014 2014-09-10 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
2015 2015-06-25 0.06 90 < 0.06
2015 2015-06-10 0.06 90 < 0.06
2015 2015-06-10 0.06 90 < 0.06
2015 2015-06-10 0.06 90 < 0.06
2015 2015-06-10 0.06 90 < 0.06
2015 2015-03-11 0.06 90 < 0.06
2015 2015-03-11 0.06 90 < 0.06
2015 2015-03-11 0.06 90 < 0.06
2015 2015-03-11 0.06 90 < 0.06
2015 2015-03-11 0.06 90 < 0.06
2015 2015-03-11 0.06 90 < 0.06
2015 2015-03-11 0.06 90 < 0.06
2014 2014-12-03 0.06 90 < 0.06
2014 2014-12-03 0.06 90 < 0.06
2014 2014-12-03 0.06 90 < 0.06
2014 2014-12-03 0.06 90 < 0.06
2014 2014-12-03 0.06 90 < 0.06
2014 2014-09-10 0.06 90 < 0.06
2014 2014-09-10 0.06 90 < 0.06
2014 2014-09-10 0.06 90 < 0.06
2014 2014-09-10 0.06 90 < 0.06
2014 2014-09-10 0.06 90 < 0.06
2014 2014-09-10 0.06 90 < 0.06
2014 2014-09-10 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
2015 2015-06-25 0.08 0 < 0.08
2015 2015-06-10 0.08 0 < 0.08
2015 2015-06-10 0.08 0 < 0.08
2015 2015-06-10 0.08 0 < 0.08
2015 2015-06-10 0.08 0 < 0.08
2015 2015-03-11 0.08 0 < 0.08
2015 2015-03-11 0.08 0 < 0.08
2015 2015-03-11 0.08 0 < 0.08
2015 2015-03-11 0.08 0 < 0.08
2015 2015-03-11 0.08 0 < 0.08
2015 2015-03-11 0.08 0 < 0.08
2015 2015-03-11 0.08 0 < 0.08
2014 2014-12-03 0.08 0 < 0.08
2014 2014-12-03 0.08 0 < 0.08
2014 2014-12-03 0.08 0 < 0.08
2014 2014-12-03 0.08 0 < 0.08
2014 2014-12-03 0.08 0 < 0.08
2014 2014-09-10 0.08 0 < 0.08
2014 2014-09-10 0.08 0 < 0.08
2014 2014-09-10 0.08 0 < 0.08
2014 2014-09-10 0.08 0 < 0.08
2014 2014-09-10 0.08 0 < 0.08
2014 2014-09-10 0.08 0 < 0.08
2014 2014-09-10 0.08 0 < 0.08
[+] Expand Test Data
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-06-10 0.09 0 < 0.09
2015 2015-06-10 0.09 0 < 0.09
2015 2015-06-10 0.09 0 < 0.09
2015 2015-06-10 0.09 0 < 0.09
2015 2015-06-10 0.09 0 < 0.09
2015 2015-03-11 0.09 0 < 0.09
2015 2015-03-11 0.09 0 < 0.09
2015 2015-03-11 0.09 0 < 0.09
2015 2015-03-11 0.09 0 < 0.09
2015 2015-03-11 0.09 0 < 0.09
2015 2015-03-11 0.09 0 < 0.09
2015 2015-03-11 0.09 0 < 0.09
2014 2014-12-03 0.09 0 < 0.09
2014 2014-12-03 0.09 0 < 0.09
2014 2014-12-03 0.09 0 < 0.09
2014 2014-12-03 0.09 0 < 0.09
2014 2014-12-03 0.09 0 < 0.09
2014 2014-09-10 0.09 0 < 0.09
2014 2014-09-10 0.09 0 < 0.09
2014 2014-09-10 0.09 0 < 0.09
2014 2014-09-10 0.09 0 < 0.09
2014 2014-09-10 0.09 0 < 0.09
2014 2014-09-10 0.09 0 < 0.09
2014 2014-09-10 0.09 0 < 0.09
[+] Expand Test Data
PFHpA 0.01 0 < 0.01 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-06-10 0.01 0 < 0.01
2015 2015-06-10 0.01 0 < 0.01
2015 2015-06-10 0.01 0 < 0.01
2015 2015-06-10 0.01 0 < 0.01
2015 2015-06-10 0.01 0 < 0.01
2015 2015-03-11 0.01 0 < 0.01
2015 2015-03-11 0.01 0 < 0.01
2015 2015-03-11 0.01 0 < 0.01
2015 2015-03-11 0.01 0 < 0.01
2015 2015-03-11 0.01 0 < 0.01
2015 2015-03-11 0.01 0 < 0.01
2015 2015-03-11 0.01 0 < 0.01
2014 2014-12-03 0.01 0 < 0.01
2014 2014-12-03 0.01 0 < 0.01
2014 2014-12-03 0.01 0 < 0.01
2014 2014-12-03 0.01 0 < 0.01
2014 2014-12-03 0.01 0 < 0.01
2014 2014-09-10 0.01 0 < 0.01
2014 2014-09-10 0.01 0 < 0.01
2014 2014-09-10 0.01 0 < 0.01
2014 2014-09-10 0.01 0 < 0.01
2014 2014-09-10 0.01 0 < 0.01
2014 2014-09-10 0.01 0 < 0.01
2014 2014-09-10 0.01 0 < 0.01
[+] Expand Test Data
PFHxS 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-06-10 0.03 0 < 0.03
2015 2015-06-10 0.03 0 < 0.03
2015 2015-06-10 0.03 0 < 0.03
2015 2015-06-10 0.03 0 < 0.03
2015 2015-06-10 0.03 0 < 0.03
2015 2015-03-11 0.03 0 < 0.03
2015 2015-03-11 0.03 0 < 0.03
2015 2015-03-11 0.03 0 < 0.03
2015 2015-03-11 0.03 0 < 0.03
2015 2015-03-11 0.03 0 < 0.03
2015 2015-03-11 0.03 0 < 0.03
2015 2015-03-11 0.03 0 < 0.03
2014 2014-12-03 0.03 0 < 0.03
2014 2014-12-03 0.03 0 < 0.03
2014 2014-12-03 0.03 0 < 0.03
2014 2014-12-03 0.03 0 < 0.03
2014 2014-12-03 0.03 0 < 0.03
2014 2014-09-10 0.03 0 < 0.03
2014 2014-09-10 0.03 0 < 0.03
2014 2014-09-10 0.03 0 < 0.03
2014 2014-09-10 0.03 0 < 0.03
2014 2014-09-10 0.03 0 < 0.03
2014 2014-09-10 0.03 0 < 0.03
2014 2014-09-10 0.03 0 < 0.03
[+] Expand Test Data
PFNA 0.02 0 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-06-10 0.02 0 < 0.02
2015 2015-06-10 0.02 0 < 0.02
2015 2015-06-10 0.02 0 < 0.02
2015 2015-06-10 0.02 0 < 0.02
2015 2015-06-10 0.02 0 < 0.02
2015 2015-03-11 0.02 0 < 0.02
2015 2015-03-11 0.02 0 < 0.02
2015 2015-03-11 0.02 0 < 0.02
2015 2015-03-11 0.02 0 < 0.02
2015 2015-03-11 0.02 0 < 0.02
2015 2015-03-11 0.02 0 < 0.02
2015 2015-03-11 0.02 0 < 0.02
2014 2014-12-03 0.02 0 < 0.02
2014 2014-12-03 0.02 0 < 0.02
2014 2014-12-03 0.02 0 < 0.02
2014 2014-12-03 0.02 0 < 0.02
2014 2014-12-03 0.02 0 < 0.02
2014 2014-09-10 0.02 0 < 0.02
2014 2014-09-10 0.02 0 < 0.02
2014 2014-09-10 0.02 0 < 0.02
2014 2014-09-10 0.02 0 < 0.02
2014 2014-09-10 0.02 0 < 0.02
2014 2014-09-10 0.02 0 < 0.02
2014 2014-09-10 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
2015 2015-06-10 0.02 0.07 < 0.02
2015 2015-06-10 0.02 0.07 < 0.02
2015 2015-06-10 0.02 0.07 < 0.02
2015 2015-06-10 0.02 0.07 < 0.02
2015 2015-06-10 0.02 0.07 < 0.02
2015 2015-03-11 0.02 0.07 < 0.02
2015 2015-03-11 0.02 0.07 < 0.02
2015 2015-03-11 0.02 0.07 < 0.02
2015 2015-03-11 0.02 0.07 < 0.02
2015 2015-03-11 0.02 0.07 < 0.02
2015 2015-03-11 0.02 0.07 < 0.02
2015 2015-03-11 0.02 0.07 < 0.02
2014 2014-12-03 0.02 0.07 < 0.02
2014 2014-12-03 0.02 0.07 < 0.02
2014 2014-12-03 0.02 0.07 < 0.02
2014 2014-12-03 0.02 0.07 < 0.02
2014 2014-12-03 0.02 0.07 < 0.02
2014 2014-09-10 0.02 0.07 < 0.02
2014 2014-09-10 0.02 0.07 < 0.02
2014 2014-09-10 0.02 0.07 < 0.02
2014 2014-09-10 0.02 0.07 < 0.02
2014 2014-09-10 0.02 0.07 < 0.02
2014 2014-09-10 0.02 0.07 < 0.02
2014 2014-09-10 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
2015 2015-06-10 0.04 0.07 < 0.04
2015 2015-06-10 0.04 0.07 < 0.04
2015 2015-06-10 0.04 0.07 < 0.04
2015 2015-06-10 0.04 0.07 < 0.04
2015 2015-06-10 0.04 0.07 < 0.04
2015 2015-03-11 0.04 0.07 < 0.04
2015 2015-03-11 0.04 0.07 < 0.04
2015 2015-03-11 0.04 0.07 < 0.04
2015 2015-03-11 0.04 0.07 < 0.04
2015 2015-03-11 0.04 0.07 < 0.04
2015 2015-03-11 0.04 0.07 < 0.04
2015 2015-03-11 0.04 0.07 < 0.04
2014 2014-12-03 0.04 0.07 < 0.04
2014 2014-12-03 0.04 0.07 < 0.04
2014 2014-12-03 0.04 0.07 < 0.04
2014 2014-12-03 0.04 0.07 < 0.04
2014 2014-12-03 0.04 0.07 < 0.04
2014 2014-09-10 0.04 0.07 < 0.04
2014 2014-09-10 0.04 0.07 < 0.04
2014 2014-09-10 0.04 0.07 < 0.04
2014 2014-09-10 0.04 0.07 < 0.04
2014 2014-09-10 0.04 0.07 < 0.04
2014 2014-09-10 0.04 0.07 < 0.04
2014 2014-09-10 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
TX108063 lead 2018-01-01 2018-06-30 0.0021mg/L
TX103476 lead 2017-07-01 2017-12-31 0.0028mg/L
TX93534 lead 2013-01-01 2015-12-31 0.0034mg/L
TX68529 lead 2010-01-01 2012-12-31 0.00314mg/L
TX36029 lead 2008-01-01 2010-12-31 0.00343mg/L

Violations

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

Compliance Dates Rule Violation Type Contaminant Name Status
2016-01-01 - 2016-03-31 Stage 2 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM Returned to Compliance
2014-07-01 - 2014-09-30 Stage 2 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM Returned to Compliance
2014-04-01 - 2014-06-30 Stage 2 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM Returned to Compliance
2014-01-01 - 2014-03-31 Stage 2 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM Returned to Compliance
2013-10-01 - 2013-12-31 Stage 2 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM Returned to Compliance
2003-01-01 - 2003-01-31 Surface Water Treatment Rule Treatment Technique (SWTR and GWR) Surface Water Treatment Rule Returned to Compliance
2016-05-18 - N/A Public Notice Rule Public Notification Violation for NPDWR Violation Public Notice Returned to Compliance
2014-03-30 - N/A Public Notice Rule Public Notification Violation for NPDWR Violation Public Notice Returned to Compliance
2015-12-30 - N/A Lead and Copper Rule Lead Consumer Notice Lead and Copper Rule 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.

Lab Location Zip Code
City of Austin Water Utility – Water Quality Laboratory Austin, TX 78728
Aqua-Tech Laboratories, Inc. Austin, TX 78744
Aqua Water Supply Corporation Bastrop, TX 78602

Water Bill Information

Convenient information about your water service.

Unable to identify any billing information about City Of San Marcos (TX1050001).

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.