Know Your Environment. Protect Your Health.

Mercury (inorganic)

Cws - Tulco 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.

 

10

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
2019ND10ND
2020N/A00N/A
2021ND40ND
2022ND50ND
2023N/A00N/A

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
2019-01-09CA5410041_004_004-201901090944ND
2021-02-15CA5410041_004_004-202102150818ND
2021-02-15CA5410041_009_009-202102150829ND
2021-03-08CA5410041_004_004-202103080949ND
2021-03-08CA5410041_009_009-202103080924ND
2022-02-17CA5410041_004_004-202202171020ND
2022-02-17CA5410041_004_004-202202170939ND
2022-02-17CA5410041_009_009-202202171012ND
2022-02-24CA5410041_009_009-202202240930ND
2022-02-24CA5410041_004_004-202202240924ND