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EWG's Tap Water Database — 2019 UPDATE

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Mercury (inorganic)

City of Phoenix

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND10ND
2014ND70ND
2015ND10ND
2016ND10ND
2017ND50ND

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
2012-01-032012000421ND
2012-01-032012000419ND
2012-01-042010248-02ND
2012-01-092012001235ND
2012-01-102012001855ND
2013-01-023010074-01ND
2014-01-064010287-01IND
2014-01-152014001121ND
2014-01-162014001135ND
2014-01-162014001407ND
2014-01-212014003196ND
2014-01-212014003180ND
2014-02-262014009692ND
2015-01-07201501070258IND
2016-01-06201601060265IND
2017-01-04201701040662IND
2017-01-112017001856ND
2017-01-182017002436ND
2017-01-182017002423ND
2017-01-252017004351ND