Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Mercury (inorganic)

Rapides Parish Waterworks District 3

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

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND40ND
2015ND20ND
2016ND60ND
2017ND100ND
2018ND20ND
2019ND20ND

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
2014-03-10AD89655ND
2014-03-10AD89655ND
2014-06-06AD92103ND
2014-06-06AD92103ND
2015-07-0835196532003ND
2015-07-0835196532003ND
2016-07-1835255428002ND
2016-07-1835255428001ND
2016-07-1835255428001ND
2016-07-1835255428002ND
2016-07-1935255757003ND
2016-07-1935255757003ND
2017-03-0835299871004ND
2017-03-0835299871005ND
2017-03-0835299871004ND
2017-03-0835299871003ND
2017-03-0835299871005ND
2017-03-0835299871003ND
2017-07-1835324925002ND
2017-07-1835324925002ND
2017-12-1935364700001ND
2017-12-1935364700001ND
2018-03-2235381823001ND
2018-03-2235381823001ND
2019-04-1735463257001ND
2019-04-1735463257001ND