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Mercury (inorganic)

Clear Brook City MUD

NOTE: Clear Brook City MUD purchases water from City of Houston which is required to test for mercury (inorganic). Sample information shown below was taken by City of Houston.

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.

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120

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND170ND
2019ND20ND
2020ND10ND
2021ND160ND
2022ND20ND
2023ND10ND

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

NOTE: Clear Brook City MUD purchases water from City of Houston which is required to test for mercury (inorganic). Sample information shown below was taken by City of Houston.

Date Lab ID Result
2018-01-18AE09188ND
2018-01-18AE09189ND
2018-01-18AE09190ND
2018-01-23AE09788ND
2018-01-23AE09789ND
2018-01-23AE09790ND
2018-01-31AE11454ND
2018-04-26AE24065ND
2018-04-26AE24066ND
2018-04-26AE24067ND
2018-05-22AE27174ND
2018-07-19AE33888ND
2018-08-03AE35761ND
2018-08-15AE37108ND
2018-08-15AE37110ND
2018-08-15AE37111ND
2018-09-26AE41684ND
2019-01-15AE50040ND
2019-01-15AE50041ND
2019-01-16AE50037ND
2019-03-06AE57322ND
2019-03-06AE57323ND
2019-03-06AE57324ND
2019-03-06AE57325ND
2019-03-06AE57326ND
2019-03-06AE57327ND
2019-04-10AE61966ND
2019-04-10AE61967ND
2019-04-11AE61968ND
2019-04-11AE61969ND
2019-07-25AE75878ND
2019-07-25AE75881ND
2019-09-23AE84176ND
2019-09-23AE84177ND
2019-11-18AE89449ND
2019-11-18AE89450ND
2019-11-22AE90333ND
2019-11-22AE90334ND
2019-11-22AE90336ND
2019-11-22AE90337ND
2019-11-22AE90338ND
2019-12-02AE90791ND
2019-12-02AE90792ND
2019-12-02AE90793ND
2019-12-02AE90794ND
2019-12-02AE90795ND
2019-12-02AE90796ND
2020-02-25AE99695ND
2020-03-16AF02880ND
2020-05-26AF12539ND
2020-05-26AF12540ND
2020-05-26AF12541ND
2020-06-11AF14993ND
2020-08-03AF21609ND
2020-08-03AF21610ND
2020-08-26AF25323ND
2020-08-27AF25584ND
2020-08-27AF25585ND
2020-10-19AF31064ND
2020-10-26AF31828ND
2020-11-04AF33223ND
2020-11-04AF33224ND
2021-02-10AF43410ND
2021-02-10AF43411ND
2021-02-10AF43412ND
2021-02-10AF43418ND
2021-02-10AF43419ND
2021-04-29AF51850ND
2021-04-29AF51851ND
2021-05-24AF55034ND
2021-07-21AF62784ND
2021-08-03AF64362ND
2021-08-03AF64363ND
2021-09-09AF69252ND
2021-09-09AF69253ND
2021-10-13AF73263ND
2021-10-13AF73264ND
2021-10-13AF73265ND
2022-03-23AF90176ND
2022-03-23AF90177ND
2022-03-23AF90178ND
2022-03-24AF90422ND
2022-03-24AF90423ND
2022-03-24AF90424ND
2022-04-06AF92143ND
2022-05-19AF97647ND
2022-05-19AF97648ND
2022-05-19AF97649ND
2022-05-19AF97650ND
2022-06-29AG02714ND
2022-08-16AG09374ND
2022-08-16AG09375ND
2022-08-17AG09601ND
2022-10-10AG16420ND
2022-10-10AG16421ND
2022-10-10AG16422ND
2022-10-10AG16423ND
2022-10-10AG16424ND
2022-10-11AG16581ND
2022-10-24AG17978ND
2022-10-24AG17979ND
2022-10-24AG17980ND
2022-10-24AG17988ND
2022-10-25AG18248ND
2022-10-25AG18252ND
2023-01-31AG26684ND
2023-01-31AG26685ND
2023-01-31AG26686ND
2023-01-31AG26691ND
2023-02-23AG30169ND
2023-04-06AG35746ND
2023-04-06AG35748ND
2023-06-27AG46096ND
2023-06-27AG46097ND
2023-08-23AG53640ND
2023-08-24AG53908ND
2023-08-24AG53909ND
2023-08-24AG53910ND
2023-10-10AG59336ND
2023-10-11AG59334ND