Know Your Environment. Protect Your Health.

Mercury (inorganic)

Middletown Water Department

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2018-03-01IOCR 200489002ND
2018-03-01IOC1 200489001ND
2018-04-16IOC1 200492152ND
2018-04-16IOCR 200492151ND
2019-05-13IOCR 200531894ND
2019-05-21IOC1 200533082ND
2019-05-21IOCR 200533084ND
2020-05-06IOC1 200574724ND
2020-05-06IOCR 200574725ND
2020-05-14IOC1 200575834ND
2020-05-14IOCR 200575835ND
2021-03-30IOC1 200611335ND
2021-03-30IOCR 200611337ND
2021-03-30IOC1 200611336ND
2021-04-07IOCR 200612106ND
2022-05-11E300182524 300182535ND
2022-05-11E300182526 300182548ND
2022-05-11I300182528 300182554ND
2022-05-11I300182529 300182559ND
2023-06-23E300370712 300370717ND
2023-06-23E300370718 300370723ND
2023-06-23I300370724 300370730ND
2023-06-23I300370731 300370737ND