Know Your Environment. Protect Your Health.

Mercury (inorganic)

Hynes Estates Mutual Water Company

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND20ND
2020ND90ND
2021ND10ND
2022N/A00N/A
2023ND20ND

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
2019-07-10CA3000519_005_005-201907101130ND
2019-11-07CA3000519_005_005-201911071310ND
2020-02-04CA3000519_005_005-202002041035ND
2020-03-12CA3000519_005_005-202003121015ND
2020-03-12CA3000519_005_005-202003121025ND
2020-05-05CA3000519_001_001-202005051030ND
2020-05-05CA3000519_005_005-202005051010ND
2020-05-21CA3000519_001_001-202005211105ND
2020-05-21CA3000519_001_001-202005211100ND
2020-06-16CA3000519_001_001-202006161000ND
2020-11-17CA3000519_001_001-202011170905ND
2021-08-03CA3000519_005_005-202108031005ND
2023-02-01CA3000519_001_001-202302011115ND
2023-07-13CA3000519_005_005-202307131025ND