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EWG's Tap Water Database — 2019 UPDATE

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Mercury (inorganic)

Water District 1 of Johnson County

Mercury is a potent neurotoxin that also damages the kidneys and other internal organs. Mercury enters drinking water from industrial pollution, mining wastes and coal-fired power plants.

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND60ND
2013ND70ND
2014ND60ND
2015ND30ND
2016ND60ND
2017ND60ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1.2 ppb

The EWG Health Guideline of 1.2 ppb for mercury (inorganic) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL) 2 ppb

The legal limit for inorganic mercury, established in 1991, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

Date Lab ID Result
2012-03-06576121WSND
2012-03-06576120WSND
2012-05-22MAY2012-IOC-TP2ND
2012-05-22MAY2012-IOC-TP3ND
2012-05-29579491WSND
2012-05-30MAY2012-IOC-TP1ND
2013-03-05592968WSND
2013-03-05592969WSND
2013-05-01MAY2013-IOC-TP3ND
2013-05-01MAY2013-IOC-TP2ND
2013-05-01MAY2013-IOC-TP1ND
2013-05-14596073WSND
2013-07-08JUL2013-IOC-TP1ND
2014-03-0470247ND
2014-03-0470260ND
2014-05-07MAY2014-IOC-TP2ND
2014-05-07MAY2014-IOC-TP1ND
2014-05-07MAY2014-IOC-TP3ND
2014-05-13113433ND
2015-05-04322586ND
2015-05-04322585ND
2015-05-04322584ND
2016-05-17MAY2016--TP3ND
2016-05-17548022ND
2016-05-17548023ND
2016-05-17MAY2016--TP2ND
2016-06-20566734ND
2016-06-20JUN2016--TP1ND
2017-02-14708552ND
2017-02-14708551ND
2017-02-14708550ND
2017-05-16MAY2017--TP2ND
2017-05-16MAY2017--TP3ND
2017-07-12JUL2017--TP1ND