Know Your Environment. Protect Your Health.

Mercury (inorganic)

Cairo

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND40ND
2021ND60ND
2022ND30ND
2023ND10ND

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
2018-02-26AJ84558ND
2018-05-07AJ88936ND
2018-07-31AJ96067ND
2018-11-28AK06877ND
2019-02-19AK11669ND
2019-05-14AK17456ND
2019-07-29AK23773ND
2019-11-20AK37175ND
2020-05-11AK45785ND
2020-07-08AK50253ND
2020-10-06AK61873ND
2020-10-07AK61992ND
2021-03-16AK71400ND
2021-03-16AK71401ND
2021-05-10AK75017ND
2021-05-10AK75018ND
2021-09-22AK86898ND
2021-11-16AK90889ND
2022-02-08AK94977ND
2022-02-09AK95160ND
2022-04-20AK99445ND
2023-04-26AL30314ND