Know Your Environment. Protect Your Health.

Mercury (inorganic)

Pratt, City of

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
2018N/A00N/A
2019ND100ND
2020N/A00N/A
2021ND10ND
2022ND100ND
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
2019-03-181137719ND
2019-03-181137720ND
2019-03-181137721ND
2019-03-181137722ND
2019-03-181137723ND
2019-03-191138165ND
2019-03-191138166ND
2019-03-191138167ND
2019-03-191138168ND
2019-03-191138164ND
2021-04-131817297ND
2022-03-212219520ND
2022-03-212219521ND
2022-03-212219522ND
2022-03-212219523ND
2022-03-212219524ND
2022-03-212219525ND
2022-03-212219526ND
2022-03-212219527ND
2022-03-212219528ND
2022-03-212219529ND
2023-10-102589869ND