Marin Municipal Water District 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: CA2110002
Type : Community water system
EPA Region : 09
Primary Service Area: Wholesaler of Water
Primary Source: Surface water
Population Served: 189,400
Contact Information
SELLIER, PAUL SELLIER, PAUL 220 Nellen Avenue CORTE MADERA, CA 94925 [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
2018-08-13
0
0.00
20.562
2018
2018-08-13
0
0.00
20.793
2018
2018-08-13
0
0.00
19.292
2018
2018-08-13
0
0.00
18.038
2018
2018-08-13
0
0.00
7.48
2018
2018-08-13
0
0.00
18.481
2018
2018-08-13
0
0.00
7.602
2018
2018-08-13
0
0.00
18.924
2018
2018-05-14
0
0.00
18.262
2018
2018-05-14
0
0.00
19.27
2018
2018-05-14
0
0.00
7.767
2018
2018-05-14
0
0.00
16.572
2018
2018-05-14
0
0.00
23.96
2018
2018-05-14
0
0.00
20.88
2018
2018-05-14
0
0.00
7.86
2018
2018-05-14
0
0.00
21.39
HAA6Br
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-08-13
0
0.00
10.115
2018
2018-08-13
0
0.00
10.249
2018
2018-08-13
0
0.00
12.616
2018
2018-08-13
0
0.00
6.066
2018
2018-08-13
0
0.00
4.953
2018
2018-08-13
0
0.00
12.853
2018
2018-08-13
0
0.00
8.486
2018
2018-08-13
0
0.00
12.733
2018
2018-05-14
0
0.00
8.538
2018
2018-05-14
0
0.00
8.777
2018
2018-05-14
0
0.00
5.487
2018
2018-05-14
0
0.00
9.437
2018
2018-05-14
0
0.00
12.49
2018
2018-05-14
0
0.00
11.71
2018
2018-05-14
0
0.00
6.67
2018
2018-05-14
0
0.00
11.86
HAA9
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-08-13
0
0.00
28.365
2018
2018-08-13
0
0.00
28.739
2018
2018-08-13
0
0.00
29.056
2018
2018-08-13
0
0.00
23.746
2018
2018-08-13
0
0.00
12.433
2018
2018-08-13
0
0.00
28.523
2018
2018-08-13
0
0.00
12.555
2018
2018-08-13
0
0.00
28.873
2018
2018-05-14
0
0.00
26.138
2018
2018-05-14
0
0.00
27.307
2018
2018-05-14
0
0.00
12.897
2018
2018-05-14
0
0.00
25.107
2018
2018-05-14
0
0.00
35.13
2018
2018-05-14
0
0.00
31.46
2018
2018-05-14
0
0.00
13.1
2018
2018-05-14
0
0.00
32.08
alpha-hexachlorocyclohexane
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-05-07
0.01
0.00
< 0.01
2018
2018-05-07
0.01
0.00
< 0.01
2018
2018-02-07
0.01
0.00
< 0.01
2018
2018-02-07
0.01
0.00
< 0.01
2018
2018-02-07
0.01
0.00
< 0.01
chlorpyrifos
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-05-07
0.03
0.00
< 0.03
2018
2018-05-07
0.03
0.00
< 0.03
2018
2018-02-07
0.03
0.00
< 0.03
2018
2018-02-07
0.03
0.00
< 0.03
2018
2018-02-07
0.03
0.00
< 0.03
dimethipin
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-05-07
0.2
0.00
< 0.2
2018
2018-05-07
0.2
0.00
< 0.2
2018
2018-02-07
0.2
0.00
< 0.2
2018
2018-02-07
0.2
0.00
< 0.2
2018
2018-02-07
0.2
0.00
< 0.2
ethoprop
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-05-07
0.03
0.00
< 0.03
2018
2018-05-07
0.03
0.00
< 0.03
2018
2018-02-07
0.03
0.00
< 0.03
2018
2018-02-07
0.03
0.00
< 0.03
2018
2018-02-07
0.03
0.00
< 0.03
germanium
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-05-07
0.3
0.00
< 0.3
2018
2018-05-07
0.3
0.00
< 0.3
2018
2018-02-07
0.3
0.00
< 0.3
2018
2018-02-07
0.3
0.00
< 0.3
2018
2018-02-07
0.3
0.00
< 0.3
manganese
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-05-07
0.4
0.00
1.4
2018
2018-05-07
0.4
0.00
12.2
2018
2018-02-07
0.4
0.00
< 0.4
2018
2018-02-07
0.4
0.00
< 0.4
2018
2018-02-07
0.4
0.00
1.17
oxyfluorfen
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-05-07
0.05
0.00
< 0.05
2018
2018-05-07
0.05
0.00
< 0.05
2018
2018-02-07
0.05
0.00
< 0.05
2018
2018-02-07
0.05
0.00
< 0.05
2018
2018-02-07
0.05
0.00
< 0.05
profenofos
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-05-07
0.3
0.00
< 0.3
2018
2018-05-07
0.3
0.00
< 0.3
2018
2018-02-07
0.3
0.00
< 0.3
2018
2018-02-07
0.3
0.00
< 0.3
2018
2018-02-07
0.3
0.00
< 0.3
tebuconazole
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-05-07
0.2
0.00
< 0.2
2018
2018-05-07
0.2
0.00
< 0.2
2018
2018-02-07
0.2
0.00
< 0.2
2018
2018-02-07
0.2
0.00
< 0.2
2018
2018-02-07
0.2
0.00
< 0.2
total permethrin
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-05-07
0.04
0.00
< 0.04
2018
2018-05-07
0.04
0.00
< 0.04
2018
2018-02-07
0.04
0.00
< 0.04
2018
2018-02-07
0.04
0.00
< 0.04
2018
2018-02-07
0.04
0.00
< 0.04
tribufos
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-05-07
0.07
0.00
< 0.07
2018
2018-05-07
0.07
0.00
< 0.07
2018
2018-02-07
0.07
0.00
< 0.07
2018
2018-02-07
0.07
0.00
< 0.07
2018
2018-02-07
0.07
0.00
< 0.07
total microcystin
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-08-06
0.3
0.00
< 0.3
2018
2018-07-17
0.3
0.00
< 0.3
2018
2018-07-02
0.3
0.00
< 0.3
butylated hydroxyanisole
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-03-12
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
2018-03-12
0.007
0.00
0.00841
quinoline
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2018
2018-03-12
0.02
0.00
< 0.02
Below health limit
Exceeded health limit
Year
Test Date
MRLMinimum Reporting Level
HRLHealth Risk Limit
Test Result
2014
2014-08-04
20
210
96
2014
2014-08-04
20
210
84
2014
2014-08-04
20
210
100
2014
2014-08-04
20
210
420
2014
2014-05-05
20
210
21
2014
2014-05-05
20
210
37
2014
2014-05-05
20
210
52
2014
2014-05-05
20
210
26
2014
2014-05-05
20
210
36
2014
2014-05-05
20
210
170
2014
2014-02-03
20
210
41
2014
2014-02-03
20
210
52
2014
2014-02-03
20
210
44
2014
2014-02-03
20
210
59
2013
2013-11-04
20
210
70
2013
2013-11-04
20
210
54
2013
2013-11-04
20
210
79
2013
2013-11-04
20
210
65
2013
2013-11-04
20
210
48
2013
2013-11-04
20
210
230
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
0.1255
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.2
100
< 0.2
2014
2014-08-04
0.2
100
0.39
2014
2014-08-04
0.2
100
< 0.2
2014
2014-08-04
0.2
100
0.28
2014
2014-05-05
0.2
100
0.5
2014
2014-05-05
0.2
100
0.24
2014
2014-05-05
0.2
100
< 0.2
2014
2014-05-05
0.2
100
0.38
2014
2014-05-05
0.2
100
< 0.2
2014
2014-05-05
0.2
100
0.24
2014
2014-02-03
0.2
100
< 0.2
2014
2014-02-03
0.2
100
< 0.2
2014
2014-02-03
0.2
100
< 0.2
2014
2014-02-03
0.2
100
< 0.2
2013
2013-11-04
0.2
100
0.25
2013
2013-11-04
0.2
100
< 0.2
2013
2013-11-04
0.2
100
< 0.2
2013
2013-11-04
0.2
100
0.23
2013
2013-11-04
0.2
100
< 0.2
2013
2013-11-04
0.2
100
< 0.2
[+] Expand Test Data
chromium-6
0.03
0
0.1517
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.03
0
0.063
2014
2014-08-04
0.03
0
0.31
2014
2014-08-04
0.03
0
0.066
2014
2014-08-04
0.03
0
0.18
2014
2014-05-05
0.03
0
0.36
2014
2014-05-05
0.03
0
0.14
2014
2014-05-05
0.03
0
0.056
2014
2014-05-05
0.03
0
0.4
2014
2014-05-05
0.03
0
0.077
2014
2014-05-05
0.03
0
0.13
2014
2014-02-03
0.03
0
0.1
2014
2014-02-03
0.03
0
0.055
2014
2014-02-03
0.03
0
0.15
2014
2014-02-03
0.03
0
0.054
2013
2013-11-04
0.03
0
0.18
2013
2013-11-04
0.03
0
0.098
2013
2013-11-04
0.03
0
0.24
2013
2013-11-04
0.03
0
0.19
2013
2013-11-04
0.03
0
0.09
2013
2013-11-04
0.03
0
0.095
[+] Expand Test Data
cobalt
1
70
< 1
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
1
70
< 1
2014
2014-08-04
1
70
< 1
2014
2014-08-04
1
70
< 1
2014
2014-08-04
1
70
< 1
2014
2014-05-05
1
70
< 1
2014
2014-05-05
1
70
< 1
2014
2014-05-05
1
70
< 1
2014
2014-05-05
1
70
< 1
2014
2014-05-05
1
70
< 1
2014
2014-05-05
1
70
< 1
2014
2014-02-03
1
70
< 1
2014
2014-02-03
1
70
< 1
2014
2014-02-03
1
70
< 1
2014
2014-02-03
1
70
< 1
2013
2013-11-04
1
70
< 1
2013
2013-11-04
1
70
< 1
2013
2013-11-04
1
70
< 1
2013
2013-11-04
1
70
< 1
2013
2013-11-04
1
70
< 1
2013
2013-11-04
1
70
< 1
[+] Expand Test Data
molybdenum
1
40
< 1
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
1
40
< 1
2014
2014-08-04
1
40
< 1
2014
2014-08-04
1
40
< 1
2014
2014-08-04
1
40
< 1
2014
2014-05-05
1
40
< 1
2014
2014-05-05
1
40
< 1
2014
2014-05-05
1
40
< 1
2014
2014-05-05
1
40
< 1
2014
2014-05-05
1
40
< 1
2014
2014-05-05
1
40
< 1
2014
2014-02-03
1
40
< 1
2014
2014-02-03
1
40
< 1
2014
2014-02-03
1
40
< 1
2014
2014-02-03
1
40
< 1
2013
2013-11-04
1
40
< 1
2013
2013-11-04
1
40
< 1
2013
2013-11-04
1
40
< 1
2013
2013-11-04
1
40
< 1
2013
2013-11-04
1
40
< 1
2013
2013-11-04
1
40
< 1
[+] Expand Test Data
strontium
0.3
1500
103.05
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.3
1500
120
2014
2014-08-04
0.3
1500
50
2014
2014-08-04
0.3
1500
130
2014
2014-08-04
0.3
1500
71
2014
2014-05-05
0.3
1500
210
2014
2014-05-05
0.3
1500
47
2014
2014-05-05
0.3
1500
46
2014
2014-05-05
0.3
1500
200
2014
2014-05-05
0.3
1500
48
2014
2014-05-05
0.3
1500
58
2014
2014-02-03
0.3
1500
60
2014
2014-02-03
0.3
1500
140
2014
2014-02-03
0.3
1500
56
2014
2014-02-03
0.3
1500
82
2013
2013-11-04
0.3
1500
190
2013
2013-11-04
0.3
1500
130
2013
2013-11-04
0.3
1500
50
2013
2013-11-04
0.3
1500
180
2013
2013-11-04
0.3
1500
120
2013
2013-11-04
0.3
1500
73
[+] Expand Test Data
vanadium
0.2
21
0.1795
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.2
21
< 0.2
2014
2014-08-04
0.2
21
< 0.2
2014
2014-08-04
0.2
21
< 0.2
2014
2014-08-04
0.2
21
< 0.2
2014
2014-05-05
0.2
21
0.82
2014
2014-05-05
0.2
21
< 0.2
2014
2014-05-05
0.2
21
< 0.2
2014
2014-05-05
0.2
21
0.83
2014
2014-05-05
0.2
21
< 0.2
2014
2014-05-05
0.2
21
< 0.2
2014
2014-02-03
0.2
21
< 0.2
2014
2014-02-03
0.2
21
< 0.2
2014
2014-02-03
0.2
21
< 0.2
2014
2014-02-03
0.2
21
< 0.2
2013
2013-11-04
0.2
21
1
2013
2013-11-04
0.2
21
< 0.2
2013
2013-11-04
0.2
21
< 0.2
2013
2013-11-04
0.2
21
0.94
2013
2013-11-04
0.2
21
< 0.2
2013
2013-11-04
0.2
21
< 0.2
[+] Expand Test Data
1,1-dichloroethane
0.03
6.14
< 0.03
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.03
6.14
< 0.03
2014
2014-08-04
0.03
6.14
< 0.03
2014
2014-05-05
0.03
6.14
< 0.03
2014
2014-05-05
0.03
6.14
< 0.03
2014
2014-05-05
0.03
6.14
< 0.03
2014
2014-02-03
0.03
6.14
< 0.03
2014
2014-02-03
0.03
6.14
< 0.03
2013
2013-11-04
0.03
6.14
< 0.03
2013
2013-11-04
0.03
6.14
< 0.03
2013
2013-11-04
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
2014
2014-08-04
0.03
0.0004
< 0.03
2014
2014-08-04
0.03
0.0004
< 0.03
2014
2014-05-05
0.03
0.0004
< 0.03
2014
2014-05-05
0.03
0.0004
< 0.03
2014
2014-05-05
0.03
0.0004
< 0.03
2014
2014-02-03
0.03
0.0004
< 0.03
2014
2014-02-03
0.03
0.0004
< 0.03
2013
2013-11-04
0.03
0.0004
< 0.03
2013
2013-11-04
0.03
0.0004
< 0.03
2013
2013-11-04
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
2014
2014-08-04
0.1
0.0103
< 0.1
2014
2014-08-04
0.1
0.0103
< 0.1
2014
2014-05-05
0.1
0.0103
< 0.1
2014
2014-05-05
0.1
0.0103
< 0.1
2014
2014-05-05
0.1
0.0103
< 0.1
2014
2014-02-03
0.1
0.0103
< 0.1
2014
2014-02-03
0.1
0.0103
< 0.1
2013
2013-11-04
0.1
0.0103
< 0.1
2013
2013-11-04
0.1
0.0103
< 0.1
2013
2013-11-04
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
2014
2014-08-04
0.07
0.35
< 0.07
2014
2014-08-04
0.07
0.35
< 0.07
2014
2014-05-05
0.07
0.35
< 0.07
2014
2014-05-05
0.07
0.35
< 0.07
2014
2014-05-05
0.07
0.35
< 0.07
2014
2014-02-03
0.07
0.35
< 0.07
2014
2014-02-03
0.07
0.35
< 0.07
2013
2013-11-04
0.07
0.35
< 0.07
2013
2013-11-04
0.07
0.35
< 0.07
2013
2013-11-04
0.07
0.35
< 0.07
[+] Expand Test Data
17-alpha-ethynylestradiol
0.0009
0.035
< 0.0009
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.0009
0.035
< 0.0009
2014
2014-08-04
0.0009
0.035
< 0.0009
2014
2014-05-05
0.0009
0.035
< 0.0009
2014
2014-05-05
0.0009
0.035
< 0.0009
2014
2014-05-05
0.0009
0.035
< 0.0009
2014
2014-02-03
0.0009
0.035
< 0.0009
2014
2014-02-03
0.0009
0.035
< 0.0009
2013
2013-11-04
0.0009
0.035
< 0.0009
2013
2013-11-04
0.0009
0.035
< 0.0009
2013
2013-11-04
0.0009
0.035
< 0.0009
[+] Expand Test Data
17-beta-estradiol
0.0004
0.0009
< 0.0004
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.0004
0.0009
< 0.0004
2014
2014-08-04
0.0004
0.0009
< 0.0004
2014
2014-05-05
0.0004
0.0009
< 0.0004
2014
2014-05-05
0.0004
0.0009
< 0.0004
2014
2014-05-05
0.0004
0.0009
< 0.0004
2014
2014-02-03
0.0004
0.0009
< 0.0004
2014
2014-02-03
0.0004
0.0009
< 0.0004
2013
2013-11-04
0.0004
0.0009
< 0.0004
2013
2013-11-04
0.0004
0.0009
< 0.0004
2013
2013-11-04
0.0004
0.0009
< 0.0004
[+] Expand Test Data
4-androstene-3,17-dione
0.0003
0
< 0.0003
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.0003
0
< 0.0003
2014
2014-08-04
0.0003
0
< 0.0003
2014
2014-05-05
0.0003
0
< 0.0003
2014
2014-05-05
0.0003
0
< 0.0003
2014
2014-05-05
0.0003
0
< 0.0003
2014
2014-02-03
0.0003
0
< 0.0003
2014
2014-02-03
0.0003
0
< 0.0003
2013
2013-11-04
0.0003
0
< 0.0003
2013
2013-11-04
0.0003
0
< 0.0003
2013
2013-11-04
0.0003
0
< 0.0003
[+] Expand Test Data
bromomethane
0.2
140
< 0.2
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.2
140
< 0.2
2014
2014-08-04
0.2
140
< 0.2
2014
2014-05-05
0.2
140
< 0.2
2014
2014-05-05
0.2
140
< 0.2
2014
2014-05-05
0.2
140
< 0.2
2014
2014-02-03
0.2
140
< 0.2
2014
2014-02-03
0.2
140
< 0.2
2013
2013-11-04
0.2
140
< 0.2
2013
2013-11-04
0.2
140
< 0.2
2013
2013-11-04
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
2014
2014-08-04
0.2
2.69
< 0.2
2014
2014-08-04
0.2
2.69
< 0.2
2014
2014-05-05
0.2
2.69
< 0.2
2014
2014-05-05
0.2
2.69
< 0.2
2014
2014-05-05
0.2
2.69
< 0.2
2014
2014-02-03
0.2
2.69
< 0.2
2014
2014-02-03
0.2
2.69
< 0.2
2013
2013-11-04
0.2
2.69
< 0.2
2013
2013-11-04
0.2
2.69
< 0.2
2013
2013-11-04
0.2
2.69
< 0.2
[+] Expand Test Data
equilin
0.004
0.35
< 0.004
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.004
0.35
< 0.004
2014
2014-08-04
0.004
0.35
< 0.004
2014
2014-05-05
0.004
0.35
< 0.004
2014
2014-05-05
0.004
0.35
< 0.004
2014
2014-05-05
0.004
0.35
< 0.004
2014
2014-02-03
0.004
0.35
< 0.004
2014
2014-02-03
0.004
0.35
< 0.004
2013
2013-11-04
0.004
0.35
< 0.004
2013
2013-11-04
0.004
0.35
< 0.004
2013
2013-11-04
0.004
0.35
< 0.004
[+] Expand Test Data
estriol
0.0008
0.35
< 0.0008
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.0008
0.35
< 0.0008
2014
2014-08-04
0.0008
0.35
< 0.0008
2014
2014-05-05
0.0008
0.35
< 0.0008
2014
2014-05-05
0.0008
0.35
< 0.0008
2014
2014-05-05
0.0008
0.35
< 0.0008
2014
2014-02-03
0.0008
0.35
< 0.0008
2014
2014-02-03
0.0008
0.35
< 0.0008
2013
2013-11-04
0.0008
0.35
< 0.0008
2013
2013-11-04
0.0008
0.35
< 0.0008
2013
2013-11-04
0.0008
0.35
< 0.0008
[+] Expand Test Data
estrone
0.002
0.35
< 0.002
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.002
0.35
< 0.002
2014
2014-08-04
0.002
0.35
< 0.002
2014
2014-05-05
0.002
0.35
< 0.002
2014
2014-05-05
0.002
0.35
< 0.002
2014
2014-05-05
0.002
0.35
< 0.002
2014
2014-02-03
0.002
0.35
< 0.002
2014
2014-02-03
0.002
0.35
< 0.002
2013
2013-11-04
0.002
0.35
< 0.002
2013
2013-11-04
0.002
0.35
< 0.002
2013
2013-11-04
0.002
0.35
< 0.002
[+] Expand Test Data
Halon 1011
0.06
90
< 0.06
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.06
90
< 0.06
2014
2014-08-04
0.06
90
< 0.06
2014
2014-05-05
0.06
90
< 0.06
2014
2014-05-05
0.06
90
< 0.06
2014
2014-05-05
0.06
90
< 0.06
2014
2014-02-03
0.06
90
< 0.06
2014
2014-02-03
0.06
90
< 0.06
2013
2013-11-04
0.06
90
< 0.06
2013
2013-11-04
0.06
90
< 0.06
2013
2013-11-04
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
2014
2014-08-04
0.08
0
< 0.08
2014
2014-08-04
0.08
0
< 0.08
2014
2014-05-05
0.08
0
< 0.08
2014
2014-05-05
0.08
0
< 0.08
2014
2014-05-05
0.08
0
< 0.08
2014
2014-02-03
0.08
0
< 0.08
2014
2014-02-03
0.08
0
< 0.08
2013
2013-11-04
0.08
0
< 0.08
2013
2013-11-04
0.08
0
< 0.08
2013
2013-11-04
0.08
0
< 0.08
[+] Expand Test Data
PFBS
0.09
0
< 0.09
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.09
0
< 0.09
2014
2014-08-04
0.09
0
< 0.09
2014
2014-05-05
0.09
0
< 0.09
2014
2014-05-05
0.09
0
< 0.09
2014
2014-05-05
0.09
0
< 0.09
2014
2014-02-03
0.09
0
< 0.09
2014
2014-02-03
0.09
0
< 0.09
2013
2013-11-04
0.09
0
< 0.09
2013
2013-11-04
0.09
0
< 0.09
2013
2013-11-04
0.09
0
< 0.09
[+] Expand Test Data
PFHpA
0.01
0
< 0.01
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.01
0
< 0.01
2014
2014-08-04
0.01
0
< 0.01
2014
2014-05-05
0.01
0
< 0.01
2014
2014-05-05
0.01
0
< 0.01
2014
2014-05-05
0.01
0
< 0.01
2014
2014-02-03
0.01
0
< 0.01
2014
2014-02-03
0.01
0
< 0.01
2013
2013-11-04
0.01
0
< 0.01
2013
2013-11-04
0.01
0
< 0.01
2013
2013-11-04
0.01
0
< 0.01
[+] Expand Test Data
PFHxS
0.03
0
< 0.03
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.03
0
< 0.03
2014
2014-08-04
0.03
0
< 0.03
2014
2014-05-05
0.03
0
< 0.03
2014
2014-05-05
0.03
0
< 0.03
2014
2014-05-05
0.03
0
< 0.03
2014
2014-02-03
0.03
0
< 0.03
2014
2014-02-03
0.03
0
< 0.03
2013
2013-11-04
0.03
0
< 0.03
2013
2013-11-04
0.03
0
< 0.03
2013
2013-11-04
0.03
0
< 0.03
[+] Expand Test Data
PFNA
0.02
0
< 0.02
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.02
0
< 0.02
2014
2014-08-04
0.02
0
< 0.02
2014
2014-05-05
0.02
0
< 0.02
2014
2014-05-05
0.02
0
< 0.02
2014
2014-05-05
0.02
0
< 0.02
2014
2014-02-03
0.02
0
< 0.02
2014
2014-02-03
0.02
0
< 0.02
2013
2013-11-04
0.02
0
< 0.02
2013
2013-11-04
0.02
0
< 0.02
2013
2013-11-04
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
2014
2014-08-04
0.02
0.07
< 0.02
2014
2014-08-04
0.02
0.07
< 0.02
2014
2014-05-05
0.02
0.07
< 0.02
2014
2014-05-05
0.02
0.07
< 0.02
2014
2014-05-05
0.02
0.07
< 0.02
2014
2014-02-03
0.02
0.07
< 0.02
2014
2014-02-03
0.02
0.07
< 0.02
2013
2013-11-04
0.02
0.07
< 0.02
2013
2013-11-04
0.02
0.07
< 0.02
2013
2013-11-04
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
2014
2014-08-04
0.04
0.07
< 0.04
2014
2014-08-04
0.04
0.07
< 0.04
2014
2014-05-05
0.04
0.07
< 0.04
2014
2014-05-05
0.04
0.07
< 0.04
2014
2014-05-05
0.04
0.07
< 0.04
2014
2014-02-03
0.04
0.07
< 0.04
2014
2014-02-03
0.04
0.07
< 0.04
2013
2013-11-04
0.04
0.07
< 0.04
2013
2013-11-04
0.04
0.07
< 0.04
2013
2013-11-04
0.04
0.07
< 0.04
[+] Expand Test Data
testosterone
0.0001
0
< 0.0001
[+] Expand Test Data
Year
Test Date
MRL
HRL
Test Result
2014
2014-08-04
0.0001
0
< 0.0001
2014
2014-08-04
0.0001
0
< 0.0001
2014
2014-05-05
0.0001
0
< 0.0001
2014
2014-05-05
0.0001
0
< 0.0001
2014
2014-05-05
0.0001
0
< 0.0001
2014
2014-02-03
0.0001
0
< 0.0001
2014
2014-02-03
0.0001
0
< 0.0001
2013
2013-11-04
0.0001
0
< 0.0001
2013
2013-11-04
0.0001
0
< 0.0001
2013
2013-11-04
0.0001
0
< 0.0001
[+] 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
CA64004
lead
2016-01-01
2018-12-31
0mg/L
CA49536
lead
2013-01-01
2015-12-31
0mg/L
211000212235LT5
lead
2012-01-01
2012-12-31
0.005mg/L
CA36786
lead
2010-01-01
2012-12-31
0mg/L
211000209273LT4
lead
2009-01-01
2009-12-31
0.005mg/L
211000208221LT4
lead
2008-01-01
2008-12-31
0.005mg/L
Violations
Known violations of the Safe Drinking Water Act as recorded by the EPA.
No violations found for Marin Municipal Water District.
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 Marin Municipal Water District (CA2110002).
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.