Know Your Environment. Protect Your Health.

Mercury (inorganic)

Hillview Water Company-oakhurst/sierra Lakes

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.

 

58

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND70ND
2019ND20ND
2020ND220ND
2021ND120ND
2022N/A00N/A
2023ND150ND

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
2018-04-30CA2010007_024_024-201804301445ND
2018-04-30CA2010007_047_047-201804301410ND
2018-04-30CA2010007_046_046-201804301410ND
2018-04-30CA2010007_048_048-201804301432ND
2018-07-25CA2010007_009_009-201807251000ND
2018-07-25CA2010007_010_010-201807251025ND
2018-09-19CA2010007_001_001-201809190911ND
2019-12-11CA2010007_039_039-201912110850ND
2019-12-11CA2010007_041_041-201912110905ND
2020-03-09CA2010007_032_032-202003090945ND
2020-03-09CA2010007_017_017-202003091050ND
2020-03-09CA2010007_030_030-202003090914ND
2020-03-09CA2010007_033_033-202003091000ND
2020-03-09CA2010007_031_031-202003090930ND
2020-03-23CA2010007_034_034-202003231015ND
2020-05-04CA2010007_003_003-202005041000ND
2020-05-04CA2010007_002_002-202005041011ND
2020-05-04CA2010007_028_028-202005041025ND
2020-05-05CA2010007_007_007-202005050814ND
2020-08-20CA2010007_039_039-202008201230ND
2020-08-20CA2010007_032_032-202008201148ND
2020-08-20CA2010007_033_033-202008201155ND
2020-08-20CA2010007_041_041-202008201215ND
2020-08-20CA2010007_034_034-202008201112ND
2020-08-20CA2010007_031_031-202008201141ND
2020-08-20CA2010007_028_028-202008201132ND
2020-08-20CA2010007_030_030-202008201127ND
2020-08-20CA2010007_017_017-202008200820ND
2020-08-20CA2010007_007_007-202008201102ND
2020-08-20CA2010007_003_003-202008201354ND
2020-08-20CA2010007_002_002-202008201343ND
2021-02-17CA2010007_040_040-202102171105ND
2021-08-11CA2010007_048_048-202108110908ND
2021-08-16CA2010007_046_046-202108160908ND
2021-08-16CA2010007_010_010-202108160908ND
2021-08-16CA2010007_001_001-202108160808ND
2021-08-16CA2010007_009_009-202108160908ND
2021-08-16CA2010007_047_047-202108160908ND
2021-08-16CA2010007_024_024-202108160908ND
2021-09-28CA2010007_051_051-202109280757ND
2021-09-28CA2010007_047_047-202109280858ND
2021-09-28CA2010007_048_048-202109280902ND
2021-09-28CA2010007_014_014-202109280800ND
2023-06-05CA2010007_040_040-202306051031ND
2023-06-05CA2010007_041_041-202306051012ND
2023-06-05CA2010007_034_034-202306051015ND
2023-06-05CA2010007_033_033-202306050958ND
2023-06-05CA2010007_032_032-202306050951ND
2023-06-05CA2010007_031_031-202306050945ND
2023-06-05CA2010007_007_007-202306050915ND
2023-06-05CA2010007_039_039-202306051117ND
2023-06-05CA2010007_030_030-202306050935ND
2023-06-06CA2010007_028_028-202306061014ND
2023-06-06CA2010007_017_017-202306060958ND
2023-06-06CA2010007_051_051-202306060820ND
2023-06-06CA2010007_002_002-202306060822ND
2023-06-06CA2010007_003_003-202306060851ND
2023-06-06CA2010007_013_013-202306061000ND