Know Your Environment. Protect Your Health.

Mercury (inorganic)

Midland-lonaconing

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019N/A00N/A
2020ND30ND
2021ND30ND
2022ND30ND
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-04-25E18003836002ND
2018-04-25E18003836003ND
2018-04-25E18003836004ND
2020-05-27E20003663003ND
2020-05-27E20003663004ND
2020-05-27E20003663005ND
2021-05-18E21003364002ND
2021-05-18E21003364003ND
2021-05-18E21003364004ND
2022-08-30E2300046803ND
2022-08-30E2300046804ND
2022-08-30E2300046805ND