Red Lion Municipal Authority 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: PA7670086
Type: Community water system
EPA Region: 03
Primary Service Area: Residential Area
Primary Source: Surface water
Population Served: 15,882
Contact Information
RED LION MUNICIPAL AUTHORITY
KEITH KAHWAJY
PO BOX 190
RED LION, PA 17356

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 2018-05-30 0 0.00 21.593
2018 2018-05-30 0 0.00 20.388
2018 2018-05-30 0 0.00 18.809
2018 2018-05-30 0 0.00 15.418
2018 2018-02-13 0 0.00 18.42
2018 2018-02-13 0 0.00 17.729
2018 2018-02-13 0 0.00 16.374
2018 2018-02-13 0 0.00 15

HAA6Br

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-05-30 0 0.00 6.825
2018 2018-05-30 0 0.00 6.605
2018 2018-05-30 0 0.00 6.487
2018 2018-05-30 0 0.00 6.093
2018 2018-02-13 0 0.00 4.95
2018 2018-02-13 0 0.00 5.119
2018 2018-02-13 0 0.00 4.694
2018 2018-02-13 0 0.00 4.34

HAA9

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-05-30 0 0.00 27.685
2018 2018-05-30 0 0.00 26.285
2018 2018-05-30 0 0.00 24.547
2018 2018-05-30 0 0.00 20.833
2018 2018-02-13 0 0.00 22.94
2018 2018-02-13 0 0.00 22.459
2018 2018-02-13 0 0.00 20.694
2018 2018-02-13 0 0.00 19.34

alpha-hexachlorocyclohexane

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

butylated hydroxyanisole

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

chlorpyrifos

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

ethoprop

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

germanium

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

manganese

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-02-13 0.4 0.00 0.93

o-toluidine

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

oxyfluorfen

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

quinoline

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

total permethrin

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

tribufos

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

anatoxin-a

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-26 0.03 0.00 < 0.03
2018 2018-06-12 0.03 0.00 < 0.03
2018 2018-05-30 0.03 0.00 < 0.03
2018 2018-05-22 0.03 0.00 < 0.03
2018 2018-05-15 0.03 0.00 < 0.03
2018 2018-04-26 0.03 0.00 < 0.03
2018 2018-04-10 0.03 0.00 < 0.03

cylindrospermopsin

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-06-26 0.09 0.00 < 0.09
2018 2018-06-12 0.09 0.00 < 0.09
2018 2018-05-30 0.09 0.00 < 0.09
2018 2018-05-22 0.09 0.00 < 0.09
2018 2018-05-15 0.09 0.00 < 0.09
2018 2018-04-26 0.09 0.00 < 0.09
2018 2018-04-10 0.09 0.00 < 0.09

total microcystin

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-05-30 0.3 0.00 < 0.3
2018 2018-05-22 0.3 0.00 < 0.3
2018 2018-05-15 0.3 0.00 < 0.3
2018 2018-04-26 0.3 0.00 < 0.3
2018 2018-04-10 0.3 0.00 < 0.3

1-butanol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-04-25 2 0.00 < 2

2-methoxyethanol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-04-25 0.4 0.00 < 0.4

2-propen-1-ol

Year Test Date MRLMinimum Reporting Level HRLHealth Risk Limit Test Result
2018 2018-04-25 0.5 0.00 < 0.5

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
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.03 6.14 < 0.03
2013 2013-08-13 0.03 6.14 < 0.03
2013 2013-05-14 0.03 6.14 < 0.03
2013 2013-02-12 0.03 6.14 < 0.03
1,2,3-trichloropropane 0.03 0.0004 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.03 0.0004 < 0.03
2013 2013-08-13 0.03 0.0004 < 0.03
2013 2013-05-14 0.03 0.0004 < 0.03
2013 2013-02-12 0.03 0.0004 < 0.03
1,3-butadiene 0.1 0.0103 < 0.1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.1 0.0103 < 0.1
2013 2013-08-13 0.1 0.0103 < 0.1
2013 2013-05-14 0.1 0.0103 < 0.1
2013 2013-02-12 0.1 0.0103 < 0.1
1,4-dioxane 0.07 0.35 < 0.07 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.07 0.35 < 0.07
2013 2013-08-13 0.07 0.35 < 0.07
2013 2013-05-14 0.07 0.35 < 0.07
2013 2013-02-12 0.07 0.35 < 0.07
bromomethane 0.2 140 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.2 140 < 0.2
2013 2013-08-13 0.2 140 < 0.2
2013 2013-05-14 0.2 140 < 0.2
2013 2013-02-12 0.2 140 < 0.2
chlorate 20 210 < 20 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 20 210 < 20
2013 2013-11-26 20 210 < 20
2013 2013-08-13 20 210 < 20
2013 2013-08-13 20 210 < 20
2013 2013-05-14 20 210 < 20
2013 2013-05-14 20 210 < 20
2013 2013-02-12 20 210 < 20
2013 2013-02-12 20 210 < 20
chloromethane 0.2 2.69 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.2 2.69 < 0.2
2013 2013-08-13 0.2 2.69 < 0.2
2013 2013-05-14 0.2 2.69 < 0.2
2013 2013-02-12 0.2 2.69 < 0.2
chromium 0.2 100 0.1038 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.2 100 0.33
2013 2013-11-26 0.2 100 0.27
2013 2013-08-13 0.2 100 0.23
2013 2013-08-13 0.2 100 < 0.2
2013 2013-06-11 0.2 100 < 0.2
2013 2013-06-11 0.2 100 < 0.2
2013 2013-02-12 0.2 100 < 0.2
2013 2013-02-12 0.2 100 < 0.2
chromium-6 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.03 0 < 0.03
2013 2013-11-26 0.03 0 < 0.03
2013 2013-08-13 0.03 0 < 0.03
2013 2013-08-13 0.03 0 < 0.03
2013 2013-05-14 0.03 0 < 0.03
2013 2013-05-14 0.03 0 < 0.03
2013 2013-02-12 0.03 0 < 0.03
2013 2013-02-12 0.03 0 < 0.03
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 1 70 < 1
2013 2013-11-26 1 70 < 1
2013 2013-08-13 1 70 < 1
2013 2013-08-13 1 70 < 1
2013 2013-06-11 1 70 < 1
2013 2013-06-11 1 70 < 1
2013 2013-02-12 1 70 < 1
2013 2013-02-12 1 70 < 1
Halon 1011 0.06 90 < 0.06 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.06 90 < 0.06
2013 2013-08-13 0.06 90 < 0.06
2013 2013-05-14 0.06 90 < 0.06
2013 2013-02-12 0.06 90 < 0.06
HCFC-22 0.08 0 < 0.08 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.08 0 < 0.08
2013 2013-08-13 0.08 0 < 0.08
2013 2013-05-14 0.08 0 < 0.08
2013 2013-02-12 0.08 0 < 0.08
molybdenum 1 40 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 1 40 < 1
2013 2013-11-26 1 40 < 1
2013 2013-08-13 1 40 < 1
2013 2013-08-13 1 40 < 1
2013 2013-06-11 1 40 < 1
2013 2013-06-11 1 40 < 1
2013 2013-02-12 1 40 < 1
2013 2013-02-12 1 40 < 1
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.09 0 < 0.09
2013 2013-08-13 0.09 0 < 0.09
2013 2013-05-14 0.09 0 < 0.09
2013 2013-02-12 0.09 0 < 0.09
PFHpA 0.01 0 < 0.01 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.01 0 < 0.01
2013 2013-08-13 0.01 0 < 0.01
2013 2013-05-14 0.01 0 < 0.01
2013 2013-02-12 0.01 0 < 0.01
PFHxS 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.03 0 < 0.03
2013 2013-08-13 0.03 0 < 0.03
2013 2013-05-14 0.03 0 < 0.03
2013 2013-02-12 0.03 0 < 0.03
PFNA 0.02 0 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.02 0 < 0.02
2013 2013-08-13 0.02 0 < 0.02
2013 2013-05-14 0.02 0 < 0.02
2013 2013-02-12 0.02 0 < 0.02
PFOA 0.02 0.07 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.02 0.07 < 0.02
2013 2013-08-13 0.02 0.07 < 0.02
2013 2013-05-14 0.02 0.07 < 0.02
2013 2013-02-12 0.02 0.07 < 0.02
PFOS 0.04 0.07 < 0.04 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.04 0.07 < 0.04
2013 2013-08-13 0.04 0.07 < 0.04
2013 2013-05-14 0.04 0.07 < 0.04
2013 2013-02-12 0.04 0.07 < 0.04
strontium 0.3 1500 49.425 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.3 1500 49.8
2013 2013-11-26 0.3 1500 48.7
2013 2013-08-13 0.3 1500 51.6
2013 2013-08-13 0.3 1500 50.9
2013 2013-06-11 0.3 1500 54.4
2013 2013-06-11 0.3 1500 52.9
2013 2013-02-12 0.3 1500 44.4
2013 2013-02-12 0.3 1500 42.7
vanadium 0.2 21 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-11-26 0.2 21 < 0.2
2013 2013-11-26 0.2 21 < 0.2
2013 2013-08-13 0.2 21 < 0.2
2013 2013-08-13 0.2 21 < 0.2
2013 2013-06-11 0.2 21 < 0.2
2013 2013-06-11 0.2 21 < 0.2
2013 2013-02-12 0.2 21 < 0.2
2013 2013-02-12 0.2 21 < 0.2

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
PBCU09201605624 lead 2016-06-01 2016-09-30 0mg/L
PBCU09201305739 lead 2013-06-01 2013-09-30 0mg/L
6990206 lead 2010-01-01 2010-12-31 0.0038mg/L

Violations


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

Compliance Dates Rule Violation Type Contaminant Name Status
2015-10-01 - 2015-12-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2015-10-01 - 2015-10-31 Surface Water Treatment Rule Monitoring of Treatment (SWTR-Filter) Surface Water Treatment Rule Returned to Compliance
2015-10-01 - 2015-10-31 Long Term 1 Enhanced Surface Water Treatment Rule Monitoring, Turbidity (Enhanced SWTR) Interim Enhanced Surfsce Water Treatment Rule Returned to Compliance
2014-01-01 - 2014-12-31 Synthetic Organic Chemicals Monitoring, Regular HEXACHLOROBENZENE Returned to Compliance
2014-01-01 - 2014-12-31 Synthetic Organic Chemicals Monitoring, Regular Heptachlor epoxide Returned to Compliance
2014-01-01 - 2014-12-31 Synthetic Organic Chemicals Monitoring, Regular Heptachlor Returned to Compliance
2014-01-01 - 2014-12-31 Synthetic Organic Chemicals Monitoring, Regular Endrin Returned to Compliance
2014-01-01 - 2014-12-31 Synthetic Organic Chemicals Monitoring, Regular 2,4,5-TP Returned to Compliance
2014-01-01 - 2014-12-31 Synthetic Organic Chemicals Monitoring, Regular Toxaphene Returned to Compliance
2014-01-01 - 2014-12-31 Synthetic Organic Chemicals Monitoring, Regular Total Polychlorinated Biphenyls (PCB) Returned to Compliance
2014-01-01 - 2014-12-31 Synthetic Organic Chemicals Monitoring, Regular Dinoseb Returned to Compliance
2014-01-01 - 2014-12-31 Synthetic Organic Chemicals Monitoring, Regular Dalapon Returned to Compliance
2014-01-01 - 2014-03-31 Stage 2 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) TTHM Returned to Compliance
2014-01-01 - 2014-03-31 Stage 2 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Total Haloacetic Acids (HAA5) Returned to Compliance
2013-10-01 - 2013-12-31 Stage 2 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Total Haloacetic Acids (HAA5) Returned to Compliance
2013-10-01 - 2013-12-31 Stage 2 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) TTHM Returned to Compliance
2013-06-01 - 2013-06-30 Surface Water Treatment Rule Monitoring of Treatment (SWTR-Filter) Surface Water Treatment Rule Returned to Compliance
2013-04-01 - 2013-06-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Chlorine Returned to Compliance
2013-06-01 - 2013-06-30 Long Term 1 Enhanced Surface Water Treatment Rule Monitoring, Turbidity (Enhanced SWTR) Interim Enhanced Surfsce Water Treatment Rule Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular Pentachlorophenol Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular OXAMYL Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular Picloram Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular Methoxychlor Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular LASSO Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular Hexachlorocyclopentadiene Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular Atrazine Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular 2,4-D Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular Benzo(a)pyrene Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular BHC-GAMMA Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular Carbofuran Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular Chlordane Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular Di(2-ethylhexyl) adipate Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular 1,2-DIBROMO-3-CHLOROPROPANE Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular Di(2-ethylhexyl) phthalate Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular Endothall Returned to Compliance
2010-01-01 - 2010-12-31 Synthetic Organic Chemicals Monitoring, Regular ETHYLENE DIBROMIDE Returned to Compliance
2002-10-01 - 2002-12-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) CARBON, TOTAL Returned to Compliance
2002-10-01 - 2002-12-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Total Haloacetic Acids (HAA5) Returned to Compliance
2002-07-01 - 2002-09-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) CARBON, TOTAL Returned to Compliance
2002-07-01 - 2002-09-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Total Haloacetic Acids (HAA5) Returned to Compliance
2002-04-01 - 2002-06-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) TTHM Returned to Compliance
2002-04-01 - 2002-06-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) CARBON, TOTAL Returned to Compliance
2002-04-01 - 2002-06-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Total Haloacetic Acids (HAA5) Returned to Compliance
2002-01-01 - 2002-03-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) CARBON, TOTAL Returned to Compliance
- 2000-05-05 Lead and Copper Rule Follow-up Or Routine LCR Tap M/R Lead and Copper Rule Returned to Compliance
- N/A Volatile Organic Chemicals Monitoring, Regular 1,1-Dichloroethylene Known
- N/A Lead and Copper Rule Follow-up Or Routine LCR Tap M/R Lead and Copper Rule Returned to Compliance
2007-10-01 - N/A Stage 2 Disinfectants and Disinfection Byproducts Rule Monitoring, Routine (IDSE) Stage 2 Disinfectants and Disinfection Byproducts Rule Returned to Compliance
- N/A Surface Water Treatment Rule Monitoring of Treatment (SWTR-Filter) Surface Water Treatment Rule Known
- N/A Surface Water Treatment Rule Monitoring of Treatment (SWTR-Filter) Surface Water Treatment Rule Known
2006-07-01 - N/A Consumer Confidence Rule Consumer Confidence Report Complete Failure to Report Consumer Confidence Rule Returned to Compliance
- N/A Volatile Organic Chemicals Monitoring, Regular Trichloroethylene Known
- N/A Volatile Organic Chemicals Monitoring, Regular p-Dichlorobenzene Known
- N/A Nitrates Monitoring, Regular Nitrite Returned to Compliance
- N/A Nitrates Monitoring, Regular Nitrate Returned to Compliance
- N/A Nitrates Monitoring, Regular Nitrate Returned to Compliance
- N/A Radionuclides Monitoring, Regular Gross Alpha, Excl. Radon and U Known
- N/A Volatile Organic Chemicals Monitoring, Regular Carbon tetrachloride Known
- N/A Volatile Organic Chemicals Monitoring, Regular Benzene Known
- N/A Volatile Organic Chemicals Monitoring, Regular 1,2-Dichloroethane Known
- N/A Volatile Organic Chemicals Monitoring, Regular 1,1,1-Trichloroethane Known

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.

Unable to identify any nearby water testing labs near 17356.

Water Bill Information


Convenient information about your water service.

Unable to identify any billing information about Red Lion Municipal Authority (PA7670086).

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.