Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Mercury (inorganic)

City of Ridgeland

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND10ND
2014ND10ND
2015ND50ND
2016ND10ND
2017N/A00N/A

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
2012-07-09120710-020INND
2012-07-09120710-019INND
2012-07-09120710-018INND
2012-07-09120710-017INND
2012-07-09120710-016INND
2013-04-30130501-001INND
2014-03-31140401-013INND
2015-11-23151124-023INND
2015-11-23151124-022INND
2015-11-23151124-021INND
2015-11-23151124-020INND
2015-11-23151124-019INND
2016-02-29160301-043INND