Mammoth Cwd 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: CA2610001
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Surface water
Population Served: 8,214 		Contact Information
HAYES, PATRICK
HAYES, PATRICK
PO Box 597
MAMMOTH LAKES, CA 93546
[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   (0) 2016   (0) 2017   (0) 2018   (0)
chlorate

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).

chlorate

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2014 2014-10-14 20 210 27
2014 2014-10-14 20 210 < 20
2014 2014-07-14 20 210 < 20
2014 2014-07-14 20 210 88
2014 2014-07-14 20 210 78
2014 2014-07-14 20 210 < 20
2014 2014-07-14 20 210 63
2014 2014-07-14 20 210 74
2014 2014-04-14 20 210 22
2014 2014-04-14 20 210 < 20
2014 2014-01-21 20 210 < 20
2014 2014-01-21 20 210 60
2014 2014-01-21 20 210 220
2014 2014-01-21 20 210 < 20
2014 2014-01-21 20 210 23
2014 2014-01-21 20 210 46

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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 0.0469 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-10-14 0.2 100 < 0.2
2014 2014-10-14 0.2 100 < 0.2
2014 2014-07-14 0.2 100 < 0.2
2014 2014-07-14 0.2 100 < 0.2
2014 2014-07-14 0.2 100 < 0.2
2014 2014-07-14 0.2 100 < 0.2
2014 2014-07-14 0.2 100 0.24
2014 2014-07-14 0.2 100 < 0.2
2014 2014-04-14 0.2 100 < 0.2
2014 2014-04-14 0.2 100 < 0.2
2014 2014-01-21 0.2 100 < 0.2
2014 2014-01-21 0.2 100 < 0.2
2014 2014-01-21 0.2 100 0.51
2014 2014-01-21 0.2 100 < 0.2
2014 2014-01-21 0.2 100 < 0.2
2014 2014-01-21 0.2 100 < 0.2
[+] Expand Test Data
chromium-6 0.03 0 0.0838 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-10-14 0.03 0 0.075
2014 2014-10-14 0.03 0 < 0.03
2014 2014-09-08 0.03 0 0.15
2014 2014-07-14 0.03 0 0.076
2014 2014-07-14 0.03 0 0.038
2014 2014-07-14 0.03 0 < 0.03
2014 2014-07-14 0.03 0 < 0.03
2014 2014-07-14 0.03 0 0.077
2014 2014-04-14 0.03 0 0.078
2014 2014-04-14 0.03 0 < 0.03
2014 2014-01-21 0.03 0 0.092
2014 2014-01-21 0.03 0 0.12
2014 2014-01-21 0.03 0 0.49
2014 2014-01-21 0.03 0 0.08
2014 2014-01-21 0.03 0 < 0.03
2014 2014-01-21 0.03 0 0.064
[+] Expand Test Data
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-10-14 1 70 < 1
2014 2014-10-14 1 70 < 1
2014 2014-07-14 1 70 < 1
2014 2014-07-14 1 70 < 1
2014 2014-07-14 1 70 < 1
2014 2014-07-14 1 70 < 1
2014 2014-07-14 1 70 < 1
2014 2014-07-14 1 70 < 1
2014 2014-04-14 1 70 < 1
2014 2014-04-14 1 70 < 1
2014 2014-01-21 1 70 < 1
2014 2014-01-21 1 70 < 1
2014 2014-01-21 1 70 < 1
2014 2014-01-21 1 70 < 1
2014 2014-01-21 1 70 < 1
2014 2014-01-21 1 70 < 1
[+] Expand Test Data
manganese 1 0 0.6313 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-10-14 1 0 < 1
2014 2014-10-14 1 0 < 1
2014 2014-07-14 1 0 < 1
2014 2014-07-14 1 0 < 1
2014 2014-07-14 1 0 < 1
2014 2014-07-14 1 0 1.5
2014 2014-07-14 1 0 < 1
2014 2014-07-14 1 0 < 1
2014 2014-04-14 1 0 < 1
2014 2014-04-14 1 0 2.6
2014 2014-01-21 1 0 < 1
2014 2014-01-21 1 0 < 1
2014 2014-01-21 1 0 5
2014 2014-01-21 1 0 1
2014 2014-01-21 1 0 < 1
2014 2014-01-21 1 0 < 1
[+] Expand Test Data
molybdenum 1 40 3.45 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-10-14 1 40 3.6
2014 2014-10-14 1 40 3.5
2014 2014-07-14 1 40 3.7
2014 2014-07-14 1 40 3.7
2014 2014-07-14 1 40 7.5
2014 2014-07-14 1 40 2.8
2014 2014-07-14 1 40 2.3
2014 2014-07-14 1 40 3.8
2014 2014-04-14 1 40 2.9
2014 2014-04-14 1 40 2.9
2014 2014-01-21 1 40 3.3
2014 2014-01-21 1 40 2.4
2014 2014-01-21 1 40 4
2014 2014-01-21 1 40 3.6
2014 2014-01-21 1 40 2.4
2014 2014-01-21 1 40 2.8
[+] Expand Test Data
strontium 0.3 1500 61.1625 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-10-14 0.3 1500 27
2014 2014-10-14 0.3 1500 16.6
2014 2014-07-14 0.3 1500 37
2014 2014-07-14 0.3 1500 100
2014 2014-07-14 0.3 1500 100
2014 2014-07-14 0.3 1500 16
2014 2014-07-14 0.3 1500 54
2014 2014-07-14 0.3 1500 90
2014 2014-04-14 0.3 1500 38
2014 2014-04-14 0.3 1500 18
2014 2014-01-21 0.3 1500 40
2014 2014-01-21 0.3 1500 150
2014 2014-01-21 0.3 1500 93
2014 2014-01-21 0.3 1500 18
2014 2014-01-21 0.3 1500 61
2014 2014-01-21 0.3 1500 120
[+] Expand Test Data
vanadium 0.2 21 2.5381 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-10-14 0.2 21 0.54
2014 2014-10-14 0.2 21 < 0.2
2014 2014-07-14 0.2 21 0.65
2014 2014-07-14 0.2 21 4.3
2014 2014-07-14 0.2 21 1.9
2014 2014-07-14 0.2 21 < 0.2
2014 2014-07-14 0.2 21 11
2014 2014-07-14 0.2 21 3.9
2014 2014-04-14 0.2 21 0.57
2014 2014-04-14 0.2 21 < 0.2
2014 2014-01-21 0.2 21 0.95
2014 2014-01-21 0.2 21 1.4
2014 2014-01-21 0.2 21 1.6
2014 2014-01-21 0.2 21 < 0.2
2014 2014-01-21 0.2 21 12
2014 2014-01-21 0.2 21 1.8
[+] Expand Test Data
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-10-14 0.03 6.14 < 0.03
2014 2014-07-14 0.03 6.14 < 0.03
2014 2014-07-14 0.03 6.14 < 0.03
2014 2014-07-14 0.03 6.14 < 0.03
2014 2014-07-14 0.03 6.14 < 0.03
2014 2014-04-14 0.03 6.14 < 0.03
2014 2014-01-21 0.03 6.14 < 0.03
2014 2014-01-21 0.03 6.14 < 0.03
2014 2014-01-21 0.03 6.14 < 0.03
2014 2014-01-21 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 2014-10-14 0.03 0.0004 < 0.03
2014 2014-07-14 0.03 0.0004 < 0.03
2014 2014-07-14 0.03 0.0004 < 0.03
2014 2014-07-14 0.03 0.0004 < 0.03
2014 2014-07-14 0.03 0.0004 < 0.03
2014 2014-04-14 0.03 0.0004 < 0.03
2014 2014-01-21 0.03 0.0004 < 0.03
2014 2014-01-21 0.03 0.0004 < 0.03
2014 2014-01-21 0.03 0.0004 < 0.03
2014 2014-01-21 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 2014-10-14 0.1 0.0103 < 0.1
2014 2014-07-14 0.1 0.0103 < 0.1
2014 2014-07-14 0.1 0.0103 < 0.1
2014 2014-07-14 0.1 0.0103 < 0.1
2014 2014-07-14 0.1 0.0103 < 0.1
2014 2014-04-14 0.1 0.0103 < 0.1
2014 2014-01-21 0.1 0.0103 < 0.1
2014 2014-01-21 0.1 0.0103 < 0.1
2014 2014-01-21 0.1 0.0103 < 0.1
2014 2014-01-21 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 2014-10-14 0.07 0.35 < 0.07
2014 2014-07-14 0.07 0.35 < 0.07
2014 2014-07-14 0.07 0.35 < 0.07
2014 2014-07-14 0.07 0.35 < 0.07
2014 2014-07-14 0.07 0.35 < 0.07
2014 2014-04-14 0.07 0.35 < 0.07
2014 2014-01-21 0.07 0.35 < 0.07
2014 2014-01-21 0.07 0.35 < 0.07
2014 2014-01-21 0.07 0.35 < 0.07
2014 2014-01-21 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
2014 2014-10-14 0.2 140 < 0.2
2014 2014-07-14 0.2 140 < 0.2
2014 2014-07-14 0.2 140 < 0.2
2014 2014-07-14 0.2 140 < 0.2
2014 2014-07-14 0.2 140 < 0.2
2014 2014-04-14 0.2 140 < 0.2
2014 2014-01-21 0.2 140 < 0.2
2014 2014-01-21 0.2 140 < 0.2
2014 2014-01-21 0.2 140 < 0.2
2014 2014-01-21 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 2014-10-14 0.2 2.69 < 0.2
2014 2014-07-14 0.2 2.69 < 0.2
2014 2014-07-14 0.2 2.69 < 0.2
2014 2014-07-14 0.2 2.69 < 0.2
2014 2014-07-14 0.2 2.69 < 0.2
2014 2014-04-14 0.2 2.69 < 0.2
2014 2014-01-21 0.2 2.69 < 0.2
2014 2014-01-21 0.2 2.69 < 0.2
2014 2014-01-21 0.2 2.69 < 0.2
2014 2014-01-21 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
2014 2014-10-14 0.06 90 < 0.06
2014 2014-07-14 0.06 90 < 0.06
2014 2014-07-14 0.06 90 < 0.06
2014 2014-07-14 0.06 90 < 0.06
2014 2014-07-14 0.06 90 < 0.06
2014 2014-04-14 0.06 90 < 0.06
2014 2014-01-21 0.06 90 < 0.06
2014 2014-01-21 0.06 90 < 0.06
2014 2014-01-21 0.06 90 < 0.06
2014 2014-01-21 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 2014-10-14 0.08 0 < 0.08
2014 2014-07-14 0.08 0 < 0.08
2014 2014-07-14 0.08 0 < 0.08
2014 2014-07-14 0.08 0 < 0.08
2014 2014-07-14 0.08 0 < 0.08
2014 2014-04-14 0.08 0 < 0.08
2014 2014-01-21 0.08 0 < 0.08
2014 2014-01-21 0.08 0 < 0.08
2014 2014-01-21 0.08 0 < 0.08
2014 2014-01-21 0.08 0 < 0.08
[+] Expand Test Data
n-propylbenzene 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-01-21 0.03 0 < 0.03
2014 2014-01-21 0.03 0 < 0.03
2014 2014-01-21 0.03 0 < 0.03
2014 2014-01-21 0.03 0 < 0.03
[+] Expand Test Data
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-10-14 0.09 0 < 0.09
2014 2014-07-14 0.09 0 < 0.09
2014 2014-07-14 0.09 0 < 0.09
2014 2014-07-14 0.09 0 < 0.09
2014 2014-07-14 0.09 0 < 0.09
2014 2014-04-14 0.09 0 < 0.09
2014 2014-01-21 0.09 0 < 0.09
2014 2014-01-21 0.09 0 < 0.09
2014 2014-01-21 0.09 0 < 0.09
2014 2014-01-21 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 2014-10-14 0.01 0 < 0.01
2014 2014-07-14 0.01 0 < 0.01
2014 2014-07-14 0.01 0 < 0.01
2014 2014-07-14 0.01 0 < 0.01
2014 2014-07-14 0.01 0 < 0.01
2014 2014-04-14 0.01 0 < 0.01
2014 2014-01-21 0.01 0 < 0.01
2014 2014-01-21 0.01 0 < 0.01
2014 2014-01-21 0.01 0 < 0.01
2014 2014-01-21 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 2014-10-14 0.03 0 < 0.03
2014 2014-07-14 0.03 0 < 0.03
2014 2014-07-14 0.03 0 < 0.03
2014 2014-07-14 0.03 0 < 0.03
2014 2014-07-14 0.03 0 < 0.03
2014 2014-04-14 0.03 0 < 0.03
2014 2014-01-21 0.03 0 < 0.03
2014 2014-01-21 0.03 0 < 0.03
2014 2014-01-21 0.03 0 < 0.03
2014 2014-01-21 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 2014-10-14 0.02 0 < 0.02
2014 2014-07-14 0.02 0 < 0.02
2014 2014-07-14 0.02 0 < 0.02
2014 2014-07-14 0.02 0 < 0.02
2014 2014-07-14 0.02 0 < 0.02
2014 2014-04-14 0.02 0 < 0.02
2014 2014-01-21 0.02 0 < 0.02
2014 2014-01-21 0.02 0 < 0.02
2014 2014-01-21 0.02 0 < 0.02
2014 2014-01-21 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 2014-10-14 0.02 0.07 < 0.02
2014 2014-07-14 0.02 0.07 < 0.02
2014 2014-07-14 0.02 0.07 < 0.02
2014 2014-07-14 0.02 0.07 < 0.02
2014 2014-07-14 0.02 0.07 < 0.02
2014 2014-04-14 0.02 0.07 < 0.02
2014 2014-01-21 0.02 0.07 < 0.02
2014 2014-01-21 0.02 0.07 < 0.02
2014 2014-01-21 0.02 0.07 < 0.02
2014 2014-01-21 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 2014-10-14 0.04 0.07 < 0.04
2014 2014-07-14 0.04 0.07 < 0.04
2014 2014-07-14 0.04 0.07 < 0.04
2014 2014-07-14 0.04 0.07 < 0.04
2014 2014-07-14 0.04 0.07 < 0.04
2014 2014-04-14 0.04 0.07 < 0.04
2014 2014-01-21 0.04 0.07 < 0.04
2014 2014-01-21 0.04 0.07 < 0.04
2014 2014-01-21 0.04 0.07 < 0.04
2014 2014-01-21 0.04 0.07 < 0.04
[+] Expand Test Data
sec-butylbenzene 0.04 0 < 0.04 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-10-14 0.04 0 < 0.04
2014 2014-07-14 0.04 0 < 0.04
2014 2014-07-14 0.04 0 < 0.04
2014 2014-07-14 0.04 0 < 0.04
2014 2014-07-14 0.04 0 < 0.04
2014 2014-04-14 0.04 0 < 0.04
2014 2014-01-21 0.04 0 < 0.04
2014 2014-01-21 0.04 0 < 0.04
2014 2014-01-21 0.04 0 < 0.04
2014 2014-01-21 0.04 0 < 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
CA59932 lead 2017-07-01 2017-12-31 0mg/L
CA56037 lead 2017-01-01 2017-06-30 0mg/L
CA53789 lead 2016-07-01 2016-12-31 0mg/L
CA51316 lead 2016-01-01 2016-06-30 0mg/L
CA49159 lead 2015-07-01 2015-12-31 0mg/L
CA45315 lead 2015-01-01 2015-06-30 0.01mg/L
CA44569 copper 2015-01-01 2015-06-30 1.4mg/L
CA42023 lead 2014-07-01 2014-12-31 0.011mg/L
CA40134 lead 2014-01-01 2014-06-30 0.009mg/L
CA39624 lead 2013-07-01 2013-12-31 0mg/L
CA39605 lead 2013-01-01 2013-06-30 0.01mg/L
CA35844 copper 2012-07-01 2012-12-31 1.8mg/L
CA39592 lead 2012-07-01 2012-12-31 0.019mg/L
261000112241L lead 2012-01-01 2012-12-31 0.019mg/L
261000112241C copper 2012-01-01 2012-12-31 1.8mg/L
261000112090L lead 2012-01-01 2012-12-31 0.005mg/L
CA39577 lead 2012-01-01 2012-06-30 0.005mg/L
261000111273L lead 2011-01-01 2011-12-31 0.0075mg/L
261000111273C copper 2011-01-01 2011-12-31 1.4mg/L
261000110243L1ST 6 lead 2010-01-01 2010-12-31 0.0056mg/L
261000110081L1ST 6 lead 2010-01-01 2010-12-31 0.0081mg/L
261000109260L2ND 6 lead 2009-01-01 2009-12-31 0.0069mg/L
261000109253L2ND 6 lead 2009-01-01 2009-12-31 0.007mg/L
261000109253C2ND 6 copper 2009-01-01 2009-12-31 1.5mg/L
261000109170CT1 copper 2009-01-01 2009-12-31 2mg/L
261000108060L1ST 6 lead 2008-01-01 2008-12-31 0.0058mg/L
261000108259L2ND 6 lead 2008-01-01 2008-12-31 0.0099mg/L
261000108259C2ND 6 copper 2008-01-01 2008-12-31 1.5mg/L

Violations

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

Compliance Dates Rule Violation Type Contaminant Name Status
2016-08-01 - 2016-08-31 Surface Water Treatment Rule Treatment Technique (SWTR and GWR) Surface Water Treatment Rule Returned to Compliance
- N/A Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Known
- N/A Surface Water Treatment Rule Treatment Technique (SWTR and GWR) Surface Water Treatment 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
DFA of California Kingsburg, CA 93631
Oilfield Environmental & Compliance Inc. Santa Maria, CA 93454
APPL, Inc. (Agriculture & Priority Pollutants Laboratories, Inc.) Clovis, CA 93611

Water Bill Information

Convenient information about your water service.

Unable to identify any billing information about Mammoth Cwd (CA2610001).

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.