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):
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
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-03-07
0
0.00
7.152
HAA6Br
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-03-07
0
0.00
15.222
HAA9
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-03-07
0
0.00
18.612
Below health limit
Exceeded health limit
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
Below health limit
Exceeded health limit
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
Below health limit
Exceeded health limit
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
Below health limit
Exceeded health limit
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
Below health limit
Exceeded health limit
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
Below health limit
Exceeded health limit
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
Below health limit
Exceeded health limit
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
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.
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.