Know Your Environment. Protect Your Health.

Mercury (inorganic)

Erec Water System

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0333 ppb31ND - 0.1000 ppb
2019N/A00N/A
20200.0286 ppb71ND - 0.200 ppb
2021N/A00N/A
2022N/A00N/A
20230.114 ppb74ND - 0.300 ppb

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 Result
2018-03-150.1000 ppb
2018-03-15ND
2018-03-15ND
2020-03-09ND
2020-03-09ND
2020-03-09ND
2020-03-09ND
2020-03-10ND
2020-03-100.200 ppb
2020-03-10ND
2023-03-13ND
2023-03-13ND
2023-03-13ND
2023-03-130.1000 ppb
2023-03-140.200 ppb
2023-03-140.200 ppb
2023-03-140.300 ppb