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EWG's Tap Water Database — 2019 UPDATE

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Mercury (inorganic)

Carson City Public Works

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.

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND120ND
2013ND50ND
2014ND40ND
2015ND60ND
2016ND30ND
2017ND80ND

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
2012-06-19201206210314-IND
2012-06-21201206220321-IND
2012-06-25201206270216-IND
2012-06-25201206270244-IND
2012-07-11201207130064-IND
2012-08-01201208020264-IND
2012-08-08201208100396-IND
2012-09-18201209200453-IND
2012-10-02201210030297-IND
2012-10-22201210230058-IND
2012-11-13201211150453-IND
2012-12-19201212200202ND
2013-06-18201306190582-IND
2013-06-26201306270194-IND
2013-07-18201307200001-IND
2013-09-09201309100461-IND
2013-09-25201309260254-IND
2014-05-27201405280593-IND
2014-07-01201407020365ND
2014-07-01201407020367ND
2014-07-01201407020366ND
2015-06-29201506300124-IOCND
2015-06-29201506300177-IOCND
2015-07-15201507160255ND
2015-08-10201508110263ND
2015-09-15201509020134ND
2015-09-24201509250182ND
2016-06-22201606230265ND
2016-06-22201606230267ND
2016-08-10201608110453ND
2017-05-15201705160632ND
2017-05-15201705160571ND
2017-05-15201705160867ND
2017-05-16201705170491ND
2017-05-16201705170304ND
2017-05-25201705260591ND
2017-07-05201707060865ND
2017-07-19201707200814ND