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EWG's Tap Water Database — 2019 UPDATE

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Mercury (inorganic)

City of Nampa

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND40ND
2014N/A00N/A
2015N/A00N/A
2016ND40ND
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
2012-02-29I58592ND
2013-12-04I1351135ND
2013-12-05I1351273ND
2013-12-12I1352283ND
2013-12-19I1353252ND
2016-06-01TEST BVND
2016-11-17I1652989ND
2016-11-17I1652993ND
2016-11-17I1652977ND
2017-01-31I1703806ND