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EWG's Tap Water Database — 2021 UPDATE

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Mercury (inorganic)

Lihue-Kapaa

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.

MORE ABOUT THIS CONTAMINANT

 

62

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND80ND
2016ND210ND
2017ND10ND
2018ND240ND
2019ND40ND

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
2014-03-20201403280345ND
2014-03-20201403280344ND
2014-03-21201403280343ND
2014-04-14C14-04-0187ND
2015-01-21C15-01-0075ND
2015-06-26201507010529ND
2015-06-26201507010530ND
2015-06-26201507010531ND
2015-11-30201512020829ND
2015-12-24201512290431ND
2015-12-24201512290432ND
2015-12-24201512290433ND
2016-03-07ND
2016-03-07ND
2016-03-07ND
2016-03-07ND
2016-03-09ND
2016-03-09ND
2016-03-09ND
2016-03-09ND
2016-03-21ND
2016-03-21ND
2016-03-21ND
2016-03-21ND
2016-03-22ND
2016-03-22ND
2016-03-22ND
2016-03-28ND
2016-03-28ND
2016-03-28ND
2016-04-04ND
2016-04-04ND
2016-04-04ND
2017-04-12ND
2018-01-16C18-01-0059ND
2018-01-16C18-01-0057ND
2018-01-16C18-01-0058ND
2018-01-16C18-01-0056ND
2018-01-17C18-01-0061ND
2018-01-17C18-01-0060ND
2018-03-05C18-03-0012ND
2018-03-05C18-03-0011ND
2018-03-06C18-03-0032ND
2018-03-06C18-03-0031ND
2018-03-07C18-03-0075ND
2018-03-07C18-03-0076ND
2018-03-07C18-03-0074ND
2018-03-19C18-03-0116ND
2018-03-19C18-03-0117ND
2018-03-19C18-03-0115ND
2018-03-30201804070267ND
2018-03-30201804070265ND
2018-03-30201804070266ND
2018-06-22201806270527ND
2018-06-22201806270525ND
2018-06-22201806270526ND
2018-07-12201807130880ND
2018-07-12201807000000ND
2019-03-11C19-03-0044ND
2019-06-28201907020606ND
2019-06-28201907020604ND
2019-06-28201907020605ND