Leesburg, Town Of 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: VA6107300
Type: Community water system
EPA Region: 03
Primary Source: Surface water
Population Served: 61,540 		Contact Information
CHAMBERS, RUSSELL
CHAMBERS, RUSSELL
1385 Russell Branch Parkway, SE
LEESBURG, VA 20175-4451
[email protected]

This public water system services 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 2018-08-06 0 0.00 50.44
2018 2018-08-06 0 0.00 50.945
2018 2018-08-06 0 0.00 49.383
2018 2018-08-06 0 0.00 50.376
2018 2018-08-06 0 0.00 47.896
2018 2018-08-06 0 0.00 47.694
2018 2018-08-06 0 0.00 49.77
2018 2018-08-06 0 0.00 49.294
2018 2018-05-08 0 0.00 26.995
2018 2018-05-08 0 0.00 28.162
2018 2018-05-08 0 0.00 24.537
2018 2018-05-08 0 0.00 21.158
2018 2018-05-08 0 0.00 25.123
2018 2018-05-08 0 0.00 29.534
2018 2018-05-08 0 0.00 14.76
2018 2018-05-08 0 0.00 26.334
2018 2018-02-06 0 0.00 20.698
2018 2018-02-06 0 0.00 24.266
2018 2018-02-06 0 0.00 16.501
2018 2018-02-06 0 0.00 14.013
2018 2018-02-06 0 0.00 16.975
2018 2018-02-06 0 0.00 19.712
2018 2018-02-06 0 0.00 14.051
2018 2018-02-06 0 0.00 23.243

HAA6Br

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-06 0 0.00 10.836
2018 2018-08-06 0 0.00 10.901
2018 2018-08-06 0 0.00 8.961
2018 2018-08-06 0 0.00 8.55
2018 2018-08-06 0 0.00 9.206
2018 2018-08-06 0 0.00 11.21
2018 2018-08-06 0 0.00 10.266
2018 2018-08-06 0 0.00 9.446
2018 2018-05-08 0 0.00 10.869
2018 2018-05-08 0 0.00 11.163
2018 2018-05-08 0 0.00 10.227
2018 2018-05-08 0 0.00 8.949
2018 2018-05-08 0 0.00 10.501
2018 2018-05-08 0 0.00 11.14
2018 2018-05-08 0 0.00 8.075
2018 2018-05-08 0 0.00 10.681
2018 2018-02-06 0 0.00 17.426
2018 2018-02-06 0 0.00 18.926
2018 2018-02-06 0 0.00 15.827
2018 2018-02-06 0 0.00 14.569
2018 2018-02-06 0 0.00 16.207
2018 2018-02-06 0 0.00 17.169
2018 2018-02-06 0 0.00 12.757
2018 2018-02-06 0 0.00 17.161

HAA9

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-06 0 0.00 60.08
2018 2018-08-06 0 0.00 60.548
2018 2018-08-06 0 0.00 57.581
2018 2018-08-06 0 0.00 58.331
2018 2018-08-06 0 0.00 56.288
2018 2018-08-06 0 0.00 57.493
2018 2018-08-06 0 0.00 58.988
2018 2018-08-06 0 0.00 57.795
2018 2018-05-08 0 0.00 36.787
2018 2018-05-08 0 0.00 38.267
2018 2018-05-08 0 0.00 33.771
2018 2018-05-08 0 0.00 29.5
2018 2018-05-08 0 0.00 34.603
2018 2018-05-08 0 0.00 39.596
2018 2018-05-08 0 0.00 22.273
2018 2018-05-08 0 0.00 35.992
2018 2018-02-06 0 0.00 35.766
2018 2018-02-06 0 0.00 40.632
2018 2018-02-06 0 0.00 30.251
2018 2018-02-06 0 0.00 26.63
2018 2018-02-06 0 0.00 31.033
2018 2018-02-06 0 0.00 34.663
2018 2018-02-06 0 0.00 25.032
2018 2018-02-06 0 0.00 38.147

chlorate

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2014 2014-12-08 20 210 330
2014 2014-12-08 20 210 220
2014 2014-09-15 20 210 470
2014 2014-09-09 20 210 650
2014 2014-09-09 20 210 680
2014 2014-06-17 20 210 490
2014 2014-06-03 20 210 480
2014 2014-03-04 20 210 160
2014 2014-03-04 20 210 160
2014 2014-03-04 20 210 120

1-butanol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 2 0.00 < 2
2018 2018-08-13 2 0.00 < 2
2018 2018-05-08 2 0.00 < 2
2018 2018-02-06 2 0.00 < 2
2018 2018-02-06 2 0.00 < 2

2-methoxyethanol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.4 0.00 < 0.4
2018 2018-08-13 0.4 0.00 < 0.4
2018 2018-05-08 0.4 0.00 < 0.4
2018 2018-02-06 0.4 0.00 < 0.4
2018 2018-02-06 0.4 0.00 < 0.4

2-propen-1-ol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.5 0.00 < 0.5
2018 2018-08-13 0.5 0.00 < 0.5
2018 2018-05-08 0.5 0.00 < 0.5
2018 2018-02-06 0.5 0.00 < 0.5
2018 2018-02-06 0.5 0.00 < 0.5

alpha-hexachlorocyclohexane

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.01 0.00 < 0.01
2018 2018-08-13 0.01 0.00 < 0.01
2018 2018-05-08 0.01 0.00 < 0.01
2018 2018-02-06 0.01 0.00 < 0.01
2018 2018-02-06 0.01 0.00 < 0.01

butylated hydroxyanisole

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.03 0.00 < 0.03
2018 2018-08-13 0.03 0.00 < 0.03
2018 2018-05-08 0.03 0.00 < 0.03
2018 2018-02-06 0.03 0.00 < 0.03
2018 2018-02-06 0.03 0.00 < 0.03

chlorpyrifos

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.03 0.00 < 0.03
2018 2018-08-13 0.03 0.00 < 0.03
2018 2018-05-08 0.03 0.00 < 0.03
2018 2018-02-06 0.03 0.00 < 0.03
2018 2018-02-06 0.03 0.00 < 0.03

dimethipin

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.2 0.00 < 0.2
2018 2018-08-13 0.2 0.00 < 0.2
2018 2018-05-08 0.2 0.00 < 0.2
2018 2018-02-06 0.2 0.00 < 0.2
2018 2018-02-06 0.2 0.00 < 0.2

ethoprop

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.03 0.00 < 0.03
2018 2018-08-13 0.03 0.00 < 0.03
2018 2018-05-08 0.03 0.00 < 0.03
2018 2018-02-06 0.03 0.00 < 0.03
2018 2018-02-06 0.03 0.00 < 0.03

germanium

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.3 0.00 < 0.3
2018 2018-08-13 0.3 0.00 < 0.3
2018 2018-05-08 0.3 0.00 < 0.3
2018 2018-02-06 0.3 0.00 < 0.3
2018 2018-02-06 0.3 0.00 < 0.3

manganese

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.4 0.00 < 0.4
2018 2018-08-13 0.4 0.00 < 0.4
2018 2018-05-08 0.4 0.00 < 0.4
2018 2018-02-06 0.4 0.00 < 0.4
2018 2018-02-06 0.4 0.00 0.788

o-toluidine

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.007 0.00 < 0.007
2018 2018-08-13 0.007 0.00 < 0.007
2018 2018-05-08 0.007 0.00 < 0.007
2018 2018-02-06 0.007 0.00 < 0.007
2018 2018-02-06 0.007 0.00 < 0.007

oxyfluorfen

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.05 0.00 < 0.05
2018 2018-08-13 0.05 0.00 < 0.05
2018 2018-05-08 0.05 0.00 < 0.05
2018 2018-02-06 0.05 0.00 < 0.05
2018 2018-02-06 0.05 0.00 < 0.05

profenofos

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.3 0.00 < 0.3
2018 2018-08-13 0.3 0.00 < 0.3
2018 2018-05-08 0.3 0.00 < 0.3
2018 2018-02-06 0.3 0.00 < 0.3
2018 2018-02-06 0.3 0.00 < 0.3

quinoline

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.02 0.00 < 0.02
2018 2018-08-13 0.02 0.00 < 0.02
2018 2018-05-08 0.02 0.00 < 0.02
2018 2018-02-06 0.02 0.00 < 0.02
2018 2018-02-06 0.02 0.00 < 0.02

tebuconazole

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.2 0.00 < 0.2
2018 2018-08-13 0.2 0.00 < 0.2
2018 2018-05-08 0.2 0.00 < 0.2
2018 2018-02-06 0.2 0.00 < 0.2
2018 2018-02-06 0.2 0.00 < 0.2

total permethrin

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.04 0.00 < 0.04
2018 2018-08-13 0.04 0.00 < 0.04
2018 2018-02-06 0.04 0.00 < 0.04
2018 2018-02-06 0.04 0.00 < 0.04

tribufos

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-08-13 0.07 0.00 < 0.07
2018 2018-08-13 0.07 0.00 < 0.07
2018 2018-05-08 0.07 0.00 < 0.07
2018 2018-02-06 0.07 0.00 < 0.07
2018 2018-02-06 0.07 0.00 < 0.07

anatoxin-a

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-09-04 0.03 0.00 < 0.03
2018 2018-08-21 0.03 0.00 < 0.03
2018 2018-08-06 0.03 0.00 < 0.03
2018 2018-07-16 0.03 0.00 < 0.03
2018 2018-07-02 0.03 0.00 < 0.03

cylindrospermopsin

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-09-04 0.09 0.00 < 0.09
2018 2018-08-21 0.09 0.00 < 0.09
2018 2018-08-06 0.09 0.00 < 0.09
2018 2018-07-16 0.09 0.00 < 0.09
2018 2018-07-02 0.09 0.00 < 0.09

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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 0.753 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-12-08 0.2 100 0.77
2014 2014-12-08 0.2 100 0.58
2014 2014-09-15 0.2 100 0.63
2014 2014-09-09 0.2 100 1.4
2014 2014-09-09 0.2 100 1.2
2014 2014-06-18 0.2 100 0.87
2014 2014-06-03 0.2 100 1.1
2014 2014-03-04 0.2 100 0.31
2014 2014-03-04 0.2 100 0.42
2014 2014-03-04 0.2 100 0.25
[+] Expand Test Data
chromium-6 0.03 0 0.651 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-12-08 0.03 0 0.57
2014 2014-12-08 0.03 0 0.39
2014 2014-09-22 0.03 0 0.44
2014 2014-09-09 0.03 0 1.2
2014 2014-09-09 0.03 0 0.86
2014 2014-06-17 0.03 0 0.95
2014 2014-06-03 0.03 0 1.1
2014 2014-03-04 0.03 0 0.31
2014 2014-03-04 0.03 0 0.45
2014 2014-03-04 0.03 0 0.24
[+] Expand Test Data
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-12-08 1 70 < 1
2014 2014-12-08 1 70 < 1
2014 2014-09-15 1 70 < 1
2014 2014-09-09 1 70 < 1
2014 2014-09-09 1 70 < 1
2014 2014-06-18 1 70 < 1
2014 2014-06-03 1 70 < 1
2014 2014-03-04 1 70 < 1
2014 2014-03-04 1 70 < 1
2014 2014-03-04 1 70 < 1
[+] Expand Test Data
molybdenum 1 40 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-12-08 1 40 < 1
2014 2014-12-08 1 40 < 1
2014 2014-09-15 1 40 < 1
2014 2014-09-09 1 40 < 1
2014 2014-09-09 1 40 < 1
2014 2014-06-18 1 40 < 1
2014 2014-06-03 1 40 < 1
2014 2014-03-04 1 40 < 1
2014 2014-03-04 1 40 < 1
2014 2014-03-04 1 40 < 1
[+] Expand Test Data
strontium 0.3 1500 164 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-12-08 0.3 1500 230
2014 2014-12-08 0.3 1500 170
2014 2014-09-15 0.3 1500 140
2014 2014-09-09 0.3 1500 230
2014 2014-09-09 0.3 1500 230
2014 2014-06-18 0.3 1500 140
2014 2014-06-03 0.3 1500 160
2014 2014-03-04 0.3 1500 110
2014 2014-03-04 0.3 1500 110
2014 2014-03-04 0.3 1500 120
[+] Expand Test Data
vanadium 0.2 21 0.078 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-12-08 0.2 21 < 0.2
2014 2014-12-08 0.2 21 < 0.2
2014 2014-09-15 0.2 21 0.44
2014 2014-09-09 0.2 21 < 0.2
2014 2014-09-09 0.2 21 < 0.2
2014 2014-06-18 0.2 21 < 0.2
2014 2014-06-03 0.2 21 < 0.2
2014 2014-03-04 0.2 21 < 0.2
2014 2014-03-04 0.2 21 0.34
2014 2014-03-04 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 2014-12-08 0.03 6.14 < 0.03
2014 2014-09-15 0.03 6.14 < 0.03
2014 2014-09-09 0.03 6.14 < 0.03
2014 2014-06-03 0.03 6.14 < 0.03
2014 2014-03-04 0.03 6.14 < 0.03
2014 2014-03-04 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 2014-12-08 0.03 0.0004 < 0.03
2014 2014-09-15 0.03 0.0004 < 0.03
2014 2014-09-09 0.03 0.0004 < 0.03
2014 2014-06-03 0.03 0.0004 < 0.03
2014 2014-03-04 0.03 0.0004 < 0.03
2014 2014-03-04 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 2014-12-08 0.1 0.0103 < 0.1
2014 2014-09-15 0.1 0.0103 < 0.1
2014 2014-09-09 0.1 0.0103 < 0.1
2014 2014-06-03 0.1 0.0103 < 0.1
2014 2014-03-04 0.1 0.0103 < 0.1
2014 2014-03-04 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 2014-12-08 0.07 0.35 < 0.07
2014 2014-09-15 0.07 0.35 < 0.07
2014 2014-09-09 0.07 0.35 < 0.07
2014 2014-06-03 0.07 0.35 < 0.07
2014 2014-03-04 0.07 0.35 < 0.07
2014 2014-03-04 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 2014-12-08 0.2 140 < 0.2
2014 2014-09-15 0.2 140 < 0.2
2014 2014-09-09 0.2 140 < 0.2
2014 2014-06-03 0.2 140 < 0.2
2014 2014-03-04 0.2 140 < 0.2
2014 2014-03-04 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 2014-12-08 0.2 2.69 < 0.2
2014 2014-09-15 0.2 2.69 < 0.2
2014 2014-09-09 0.2 2.69 < 0.2
2014 2014-06-03 0.2 2.69 < 0.2
2014 2014-03-04 0.2 2.69 < 0.2
2014 2014-03-04 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 2014-12-08 0.06 90 < 0.06
2014 2014-09-15 0.06 90 < 0.06
2014 2014-09-09 0.06 90 < 0.06
2014 2014-06-03 0.06 90 < 0.06
2014 2014-03-04 0.06 90 < 0.06
2014 2014-03-04 0.06 90 < 0.06
[+] Expand Test Data
HCFC-22 0.08 0 0.055 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2014 2014-12-08 0.08 0 < 0.08
2014 2014-09-15 0.08 0 0.16
2014 2014-09-09 0.08 0 < 0.08
2014 2014-06-03 0.08 0 < 0.08
2014 2014-03-04 0.08 0 0.17
2014 2014-03-04 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 2014-12-08 0.09 0 < 0.09
2014 2014-09-15 0.09 0 < 0.09
2014 2014-09-09 0.09 0 < 0.09
2014 2014-06-03 0.09 0 < 0.09
2014 2014-03-04 0.09 0 < 0.09
2014 2014-03-04 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 2014-12-08 0.01 0 < 0.01
2014 2014-09-15 0.01 0 < 0.01
2014 2014-09-09 0.01 0 < 0.01
2014 2014-06-03 0.01 0 < 0.01
2014 2014-03-04 0.01 0 < 0.01
2014 2014-03-04 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 2014-12-08 0.03 0 < 0.03
2014 2014-09-15 0.03 0 < 0.03
2014 2014-09-09 0.03 0 < 0.03
2014 2014-06-03 0.03 0 < 0.03
2014 2014-03-04 0.03 0 < 0.03
2014 2014-03-04 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 2014-12-08 0.02 0 < 0.02
2014 2014-09-15 0.02 0 < 0.02
2014 2014-09-09 0.02 0 < 0.02
2014 2014-06-03 0.02 0 < 0.02
2014 2014-03-04 0.02 0 < 0.02
2014 2014-03-04 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 2014-12-08 0.02 0.07 < 0.02
2014 2014-09-15 0.02 0.07 < 0.02
2014 2014-09-09 0.02 0.07 < 0.02
2014 2014-06-03 0.02 0.07 < 0.02
2014 2014-03-04 0.02 0.07 < 0.02
2014 2014-03-04 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 2014-12-08 0.04 0.07 < 0.04
2014 2014-09-15 0.04 0.07 < 0.04
2014 2014-09-09 0.04 0.07 < 0.04
2014 2014-06-03 0.04 0.07 < 0.04
2014 2014-03-04 0.04 0.07 < 0.04
2014 2014-03-04 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
VA23833 lead 2016-01-01 2016-12-31 0.002mg/L
VA23441 lead 2012-01-01 2014-12-31 0.002mg/L
VA20032 lead 2011-01-01 2013-12-31 0.002mg/L
VA16130 lead 2008-01-01 2010-12-31 0.003mg/L
VA11268 lead 2006-01-01 2008-12-31 0.003mg/L

Violations

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

No violations found for Leesburg, Town Of.


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
Aerobiology Lab Associates Dulles, VA 20166
HP ENVIRONMENTAL, INC. HERNDON, VA 20170

Water Bill Information

Convenient information about your water service.

Unable to identify any billing information about Leesburg, Town Of (VA6107300).

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.