Know Your Environment. Protect Your Health.

Mercury (inorganic)

Lafayette Utilities 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.

 

56

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND200ND
2019ND140ND
2020ND30ND
2021ND100ND
2022ND60ND
2023ND30ND

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
2018-03-05AE20867ND
2018-03-05AE20855ND
2018-03-05AE20867ND
2018-03-05AE20864ND
2018-03-05AE20861ND
2018-03-05AE20858ND
2018-03-05AE20855ND
2018-03-05AE20858ND
2018-03-05AE20861ND
2018-03-05AE20864ND
2018-04-30AE21621ND
2018-04-30AE21621ND
2018-05-14AE21747ND
2018-05-14AE21747ND
2018-06-18AE21918ND
2018-06-18AE21918ND
2018-06-19AE21921ND
2018-06-19AE21921ND
2018-06-19AE21924ND
2018-06-19AE21924ND
2019-01-14B1900254-001ND
2019-01-14B1900254-002ND
2019-01-14B1900254-001ND
2019-01-14B1900254-002ND
2019-08-12B1903460-002ND
2019-08-12B1903460-004ND
2019-08-12B1903460-003ND
2019-08-12B1903460-002ND
2019-08-12B1903460-001ND
2019-08-12B1903460-005ND
2019-08-12B1903460-004ND
2019-08-12B1903460-003ND
2019-08-12B1903460-001ND
2019-08-12B1903460-005ND
2020-07-20B2003551-001ND
2020-07-20B2003551-003ND
2020-07-20B2003551-002ND
2021-02-08B2100522-005ND
2021-02-08B2100522-004ND
2021-02-08B2100522-003ND
2021-02-08B2100522-002ND
2021-02-08B2100522-001ND
2021-06-21B2102780-004ND
2021-06-21B2102780-005ND
2021-06-21B2102780-003ND
2021-06-21B2102780-002ND
2021-06-21B2102780-001ND
2022-05-23B2202455-001ND
2022-05-23B2202455-002ND
2022-05-23B2202455-003ND
2022-05-23B2202455-004ND
2022-05-23B2202455-005ND
2022-05-23B2202455-006ND
2023-05-22B2302104-001ND
2023-05-22B2302104-002ND
2023-05-22B2302104-003ND