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EWG's Tap Water Database — 2019 UPDATE

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Mercury (inorganic)

City of Mesa

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.

 

70

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND320ND
2013ND20ND
2014ND10ND
2015ND320ND
2016ND20ND
2017ND10ND

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
2012-04-09201204090008IND
2012-04-16201204160112IND
2012-05-07201205070059IND
2012-05-08201205080126IND
2012-05-0812040145ND
2012-08-06201208060115IND
2012-08-06201208060116IND
2012-08-06201208060117IND
2012-08-07201208070367IND
2012-08-08201208080565IND
2012-08-08201208080564IND
2012-08-08201208080563IND
2012-08-13201208130185IND
2012-08-13201208130184IND
2012-08-13201208130183IND
2012-08-14201208140228IND
2012-08-14201208140227IND
2012-08-14201208140229IND
2012-08-15201208150503IND
2012-08-15201208150502IND
2012-08-15201208150501IND
2012-08-22201208220601IND
2012-08-22201208220600IND
2012-08-22201208220599IND
2012-08-27201208270028IND
2012-08-27201208270027IND
2012-08-27201208270029IND
2012-08-28201208280358IND
2012-08-28201208280357IND
2012-09-24201209240094IND
2012-11-202012112001155IND
2012-11-2012110619ND
2013-07-16201307170487IND
2013-10-14201310150511IND
2014-10-0820140090468IND
2015-04-07201504080340IND
2015-04-07201504080338IND
2015-04-07201504070448IND
2015-04-0715040249ND
2015-04-14201504150237IND
2015-04-21201504220401IND
2015-04-28201504290427IND
2015-04-29201504290425IND
2015-04-29201504290428IND
2015-07-06550-48278-1ND
2015-07-06550-48277-1ND
2015-07-06550-48276-1ND
2015-07-06550-48275-1ND
2015-07-07550-48274-1ND
2015-07-07550-48273-1ND
2015-07-07550-48272-1ND
2015-07-13201507280208IND
2015-07-13201507280205IND
2015-07-13201507280206IND
2015-07-13201507280207IND
2015-07-14201507280212IND
2015-07-14201507280211IND
2015-07-14201507280210IND
2015-07-14201507280209IND
2015-07-20201507280213IND
2015-07-21201507280218IND
2015-07-21201507280217IND
2015-07-21201507280216IND
2015-07-21201507280215IND
2015-07-21201507280214IND
2015-07-2115070448ND
2015-07-27201507280231IND
2016-06-08201606090223IND
2016-10-0416100039ND
2017-10-1017100401ND