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EWG's Tap Water Database — 2021 UPDATE

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Mercury (inorganic)

Palmdale Water District

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.

MORE ABOUT THIS CONTAMINANT

 

57

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND20ND
2016ND240ND
2017ND20ND
2018ND20ND
2019ND250ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2014-04-179590-030-0800ND
2014-04-179590-001-0800ND
2015-02-129590-030-1115ND
2015-02-179590-001-0730ND
2016-01-199590-019-0920ND
2016-01-199590-033-1025ND
2016-01-199590-032-1130ND
2016-01-199590-018-0910ND
2016-01-199590-016-1015ND
2016-01-209590-008-0810ND
2016-01-209590-009-0750ND
2016-01-209590-029-0820ND
2016-01-209590-012-0750ND
2016-01-209590-003-0730ND
2016-01-209590-014-0735ND
2016-01-209590-004-0720ND
2016-01-219590-007-0930ND
2016-01-219590-025-0720ND
2016-01-219590-027-1015ND
2016-01-219590-021-0800ND
2016-01-219590-028-0900ND
2016-01-219590-059-0740ND
2016-01-219590-011-0820ND
2016-02-249590-026-1000ND
2016-03-179590-030-0800ND
2016-03-179590-001-0800ND
2016-03-249590-015-1015ND
2016-05-199590-022-0830ND
2017-01-269590-030-0800ND
2017-01-269590-001-0800ND
2018-02-149590-030-0800ND
2018-02-149590-001-0930ND
2019-01-239590-015-0945ND
2019-01-239590-012-0920ND
2019-01-249590-007-0925ND
2019-01-249590-014-0950ND
2019-02-079590-009-0950ND
2019-02-079590-004-1050ND
2019-02-079590-029-0920ND
2019-02-079590-003-1020ND
2019-02-139590-022-0815ND
2019-02-139590-059-0840ND
2019-02-139590-033-0750ND
2019-02-139590-026-0925ND
2019-02-149590-011-0920ND
2019-02-149590-008-0850ND
2019-02-219590-016-1100ND
2019-02-219590-032-1040ND
2019-02-219590-027-1140ND
2019-03-069590-014-0840ND
2019-03-079590-030-1110ND
2019-03-079590-001-1100ND
2019-03-279590-028-0845ND
2019-03-279590-018-0915ND
2019-03-279590-019-0935ND
2019-03-279590-021-0810ND
2019-11-149590-025-1035ND