Know Your Environment. Protect Your Health.

Mercury (inorganic)

Cedar Crest

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND20ND
2020N/A00N/A
2021ND60ND
2022ND20ND
20230.407 ppb75ND - 0.830 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 Lab ID Result
2018-06-26ND
2018-06-26ND
2018-06-27ND
2019-06-18ND
2019-08-19ND
2021-06-214135512ND
2021-06-284137272ND
2021-06-284137271ND
2021-09-174186226ND
2021-09-174186225ND
2021-09-174186225ND
2022-09-134366215ND
2022-12-014395605ND
2023-05-254469040ND
2023-08-2445602780.700 ppb
2023-08-2445602790.830 ppb
2023-09-114560275ND
2023-09-2145599110.410 ppb
2023-09-2145599090.440 ppb
2023-09-2145598580.470 ppb