Fort Sam Houston 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: TX0150116
Type: Community water system
EPA Region: 06
Primary Service Area: Other Residential
Primary Source: Ground water
Population Served: 37,563 		Contact Information
ROESCH, BRENDA
ROESCH, BRENDA
1555 GOTT ST
JBSA LACKLAND, TX 78236-5646

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

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0 0.00 0.307
2018 2018-03-14 0 0.00 0.426
2018 2018-03-14 0 0.00 0.52

HAA6Br

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0 0.00 0.685
2018 2018-03-14 0 0.00 0.797
2018 2018-03-14 0 0.00 0.96

HAA9

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0 0.00 0.685
2018 2018-03-14 0 0.00 0.797
2018 2018-03-14 0 0.00 0.96

1-butanol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 2 0.00 < 2
2018 2018-03-14 2 0.00 < 2
2018 2018-03-14 2 0.00 < 2

2-methoxyethanol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0.4 0.00 < 0.4
2018 2018-03-14 0.4 0.00 < 0.4
2018 2018-03-14 0.4 0.00 < 0.4

2-propen-1-ol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0.5 0.00 < 0.5
2018 2018-03-14 0.5 0.00 < 0.5
2018 2018-03-14 0.5 0.00 < 0.5

alpha-hexachlorocyclohexane

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0.01 0.00 < 0.01
2018 2018-03-14 0.01 0.00 < 0.01
2018 2018-03-14 0.01 0.00 < 0.01

chlorpyrifos

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0.03 0.00 < 0.03
2018 2018-03-14 0.03 0.00 < 0.03
2018 2018-03-14 0.03 0.00 < 0.03

dimethipin

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0.2 0.00 < 0.2
2018 2018-03-14 0.2 0.00 < 0.2
2018 2018-03-14 0.2 0.00 < 0.2

ethoprop

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0.03 0.00 < 0.03
2018 2018-03-14 0.03 0.00 < 0.03
2018 2018-03-14 0.03 0.00 < 0.03

oxyfluorfen

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0.05 0.00 < 0.05
2018 2018-03-14 0.05 0.00 < 0.05
2018 2018-03-14 0.05 0.00 < 0.05

profenofos

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0.3 0.00 < 0.3
2018 2018-03-14 0.3 0.00 < 0.3
2018 2018-03-14 0.3 0.00 < 0.3

tebuconazole

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0.2 0.00 < 0.2
2018 2018-03-14 0.2 0.00 < 0.2
2018 2018-03-14 0.2 0.00 < 0.2

total permethrin

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0.04 0.00 < 0.04
2018 2018-03-14 0.04 0.00 < 0.04
2018 2018-03-14 0.04 0.00 < 0.04

tribufos

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-03-14 0.07 0.00 < 0.07
2018 2018-03-14 0.07 0.00 < 0.07
2018 2018-03-14 0.07 0.00 < 0.07

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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
chlorate 20 210 < 20 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-01-20 20 210 < 20
2015 2015-01-20 20 210 < 20
2015 2015-01-20 20 210 < 20
2015 2015-01-20 20 210 < 20
2014 2014-07-31 20 210 < 20
2014 2014-07-31 20 210 < 20
2014 2014-07-31 20 210 < 20
2014 2014-07-31 20 210 < 20
[+] Expand Test Data
chromium-6 0.03 0 0.1045 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-01-20 0.03 0 0.103
2015 2015-01-20 0.03 0 0.095
2015 2015-01-20 0.03 0 0.1
2015 2015-01-20 0.03 0 0.128
2014 2014-07-31 0.03 0 0.101
2014 2014-07-31 0.03 0 0.103
2014 2014-07-31 0.03 0 0.0901
2014 2014-07-31 0.03 0 0.116
[+] Expand Test Data
chromium 0.2 100 0.0265 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-03-18 0.2 100 0.212
2015 2015-01-20 0.2 100 < 0.2
2015 2015-01-20 0.2 100 < 0.2
2015 2015-01-20 0.2 100 < 0.2
2014 2014-08-27 0.2 100 < 0.2
2014 2014-08-27 0.2 100 < 0.2
2014 2014-08-27 0.2 100 < 0.2
2014 2014-07-31 0.2 100 < 0.2
[+] Expand Test Data
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-03-18 1 70 < 1
2015 2015-01-20 1 70 < 1
2015 2015-01-20 1 70 < 1
2015 2015-01-20 1 70 < 1
2014 2014-08-27 1 70 < 1
2014 2014-08-27 1 70 < 1
2014 2014-08-27 1 70 < 1
2014 2014-07-31 1 70 < 1
[+] Expand Test Data
molybdenum 1 40 0.8225 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-03-18 1 40 < 1
2015 2015-01-20 1 40 < 1
2015 2015-01-20 1 40 < 1
2015 2015-01-20 1 40 1.01
2014 2014-08-27 1 40 2.2
2014 2014-08-27 1 40 2.23
2014 2014-08-27 1 40 1.14
2014 2014-07-31 1 40 < 1
[+] Expand Test Data
strontium 0.3 1500 886.75 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-03-18 0.3 1500 768
2015 2015-01-20 0.3 1500 715
2015 2015-01-20 0.3 1500 719
2015 2015-01-20 0.3 1500 1030
2014 2014-08-27 0.3 1500 948
2014 2014-08-27 0.3 1500 950
2014 2014-08-27 0.3 1500 1200
2014 2014-07-31 0.3 1500 764
[+] Expand Test Data
vanadium 0.2 21 3.285 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-03-18 0.2 21 3.26
2015 2015-01-20 0.2 21 2.64
2015 2015-01-20 0.2 21 3.06
2015 2015-01-20 0.2 21 3.01
2014 2014-08-27 0.2 21 4.03
2014 2014-08-27 0.2 21 4.01
2014 2014-08-27 0.2 21 3.08
2014 2014-07-31 0.2 21 3.19
[+] Expand Test Data
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-01-20 0.03 6.14 < 0.03
2015 2015-01-20 0.03 6.14 < 0.03
2014 2014-07-31 0.03 6.14 < 0.03
2014 2014-07-31 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 2015-01-20 0.03 0.0004 < 0.03
2015 2015-01-20 0.03 0.0004 < 0.03
2014 2014-07-31 0.03 0.0004 < 0.03
2014 2014-07-31 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 2015-01-20 0.1 0.0103 < 0.1
2015 2015-01-20 0.1 0.0103 < 0.1
2014 2014-07-31 0.1 0.0103 < 0.1
2014 2014-07-31 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 2015-01-20 0.07 0.35 < 0.07
2015 2015-01-20 0.07 0.35 < 0.07
2014 2014-07-31 0.07 0.35 < 0.07
2014 2014-07-31 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 2015-01-20 0.2 140 < 0.2
2015 2015-01-20 0.2 140 < 0.2
2014 2014-07-31 0.2 140 < 0.2
2014 2014-07-31 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 2015-01-20 0.2 2.69 < 0.2
2015 2015-01-20 0.2 2.69 < 0.2
2014 2014-07-31 0.2 2.69 < 0.2
2014 2014-07-31 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 2015-01-20 0.06 90 < 0.06
2015 2015-01-20 0.06 90 < 0.06
2014 2014-07-31 0.06 90 < 0.06
2014 2014-07-31 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 2015-01-20 0.08 0 < 0.08
2015 2015-01-20 0.08 0 < 0.08
2014 2014-07-31 0.08 0 < 0.08
2014 2014-07-31 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 2015-01-20 0.09 0 < 0.09
2015 2015-01-20 0.09 0 < 0.09
2014 2014-07-31 0.09 0 < 0.09
2014 2014-07-31 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 2015-01-20 0.01 0 < 0.01
2015 2015-01-20 0.01 0 < 0.01
2014 2014-07-31 0.01 0 < 0.01
2014 2014-07-31 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 2015-01-20 0.03 0 < 0.03
2015 2015-01-20 0.03 0 < 0.03
2014 2014-07-31 0.03 0 < 0.03
2014 2014-07-31 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 2015-01-20 0.02 0 < 0.02
2015 2015-01-20 0.02 0 < 0.02
2014 2014-07-31 0.02 0 < 0.02
2014 2014-07-31 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 2015-01-20 0.02 0.07 < 0.02
2015 2015-01-20 0.02 0.07 < 0.02
2014 2014-07-31 0.02 0.07 < 0.02
2014 2014-07-31 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 2015-01-20 0.04 0.07 < 0.04
2015 2015-01-20 0.04 0.07 < 0.04
2014 2014-07-31 0.04 0.07 < 0.04
2014 2014-07-31 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
TX112654 lead 2019-01-01 2019-06-30 0.002mg/L
TX111993 lead 2018-07-01 2018-12-31 0.0029mg/L
TX108622 lead 2018-01-01 2018-06-30 0.069mg/L
TX105212 lead 2017-07-01 2017-12-31 0.012mg/L
TX99238 lead 2014-01-01 2016-12-31 0.0054mg/L
TX83169 lead 2013-01-01 2013-12-31 0.00161mg/L
TX78202 lead 2012-07-01 2012-12-31 0.00281mg/L

Violations

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

Compliance Dates Rule Violation Type Contaminant Name Status
2016-12-01 - 2016-12-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorite Returned to Compliance
2016-11-01 - 2016-11-30 Revised Total Coliform Rule Monitoring, Routine (RTCR) Revised Total Coliform Rule Returned to Compliance
2016-07-01 - 2016-07-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine dioxide Returned to Compliance
2016-07-01 - 2016-07-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorite Returned to Compliance
2016-06-01 - 2016-06-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorite Returned to Compliance
2016-06-01 - 2016-06-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine dioxide Returned to Compliance
2016-05-01 - 2016-05-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorite Returned to Compliance
2016-05-01 - 2016-05-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine dioxide Returned to Compliance
2016-04-01 - 2016-04-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorite Returned to Compliance
2016-04-01 - 2016-04-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine dioxide Returned to Compliance
2016-03-01 - 2016-03-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorite Returned to Compliance
2016-03-01 - 2016-03-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine dioxide Returned to Compliance
2016-02-01 - 2016-02-29 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine dioxide Returned to Compliance
2016-02-01 - 2016-02-29 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorite Returned to Compliance
2016-01-01 - 2016-01-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorite Returned to Compliance
2016-01-01 - 2016-01-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine dioxide Returned to Compliance
2015-12-01 - 2015-12-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine dioxide Returned to Compliance
2015-12-01 - 2015-12-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorite Returned to Compliance
2014-07-01 - 2014-09-30 Stage 2 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) TTHM Returned to Compliance
2014-07-01 - 2014-09-30 Stage 2 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Total Haloacetic Acids (HAA5) Returned to Compliance
2007-01-01 - 2007-03-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2006-10-01 - 2006-12-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2006-10-01 - 2006-10-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
2006-10-01 - 2006-10-31 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
2006-09-01 - 2006-09-30 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
2006-07-01 - 2006-09-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2006-04-01 - 2006-06-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2006-04-01 - 2006-04-30 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
2006-01-01 - 2006-03-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2005-10-01 - 2005-12-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2005-07-01 - 2005-09-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2005-04-01 - 2005-06-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2005-04-01 - 2005-04-30 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
2005-01-01 - 2005-03-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2004-10-01 - 2004-12-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2004-07-01 - 2004-09-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2004-04-01 - 2004-06-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2004-01-01 - 2004-03-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2003-09-01 - 2003-09-30 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
2003-07-01 - 2003-07-31 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Known
2003-06-01 - 2003-06-30 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
2003-05-01 - 2003-05-31 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
2003-01-01 - 2003-01-31 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
- N/A Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Known
- N/A Total Coliform Rule Notification, Public Coliform (TCR) Known
2005-06-01 - N/A Public Notice Rule Public Notification Violation for NPDWR Violation Public Notice Open
2003-05-01 - N/A Public Notice Rule Public Notification Violation for NPDWR Violation Public Notice Returned to Compliance
2004-01-01 - N/A Public Notice Rule Public Notification Violation for NPDWR Violation Public Notice Returned to Compliance
2017-01-11 - N/A Public Notice Rule Public Notification Violation for NPDWR Violation Public Notice Returned to Compliance
2016-10-01 - N/A Lead and Copper Rule Follow-up Or Routine LCR Tap M/R Lead and Copper Rule Open
2006-06-01 - N/A Public Notice Rule Public Notification Violation for NPDWR Violation Public Notice Returned to Compliance
- N/A Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Known
- N/A Total Coliform Rule Monitoring, Repeat Minor (TCR) Coliform (TCR) Known
2007-01-01 - N/A Public Notice Rule Public Notification Violation for NPDWR Violation Public Notice Returned to Compliance
2017-02-03 - N/A Public Notice Rule Public Notification Violation for NPDWR Violation Public Notice Returned to Compliance
- N/A Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Known
- N/A Total Coliform Rule Notification, Public Coliform (TCR) Known
- N/A Total Coliform Rule Monitoring, Repeat Minor (TCR) Coliform (TCR) Known
2003-09-01 - N/A Public Notice Rule Public Notification Violation for NPDWR Violation Public Notice 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
Alamo Analytical Laboratories, Ltd. San Antonio, TX 78216
Guadalupe – Blanco River Authority Regional Laboratory Seguin, TX 78155
San Antonio River Authority Regional Environmental Laboratory San Antonio, TX 78212

Water Bill Information

Convenient information about your water service.

Unable to identify any billing information about Fort Sam Houston (TX0150116).

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.