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EWG's Tap Water Database — 2019 UPDATE

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Mercury (inorganic)

Philadelphia Water Department

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2012-11-06DW121106-003ND
2012-11-06DW121106-001ND
2012-11-06DW121106-000ND
2013-10-08DW131008-003ND
2013-10-08DW131008-002ND
2013-10-08DW131008-001ND
2014-10-07DW141007-021ND
2014-10-07DW141007-013ND
2014-10-07DW141007-040ND
2015-10-0613394021ND
2015-10-0613394019ND
2015-10-0613394020ND
2016-10-0415082315ND
2016-10-0415082316ND
2016-10-0415082317ND
2017-10-0316886149ND
2017-10-0316886150ND
2017-10-0316886151ND