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EWG's Tap Water Database — 2021 UPDATE

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Toluene

Norwalk Water Department

Toluene is a volatile solvent that harms the nervous and immune systems, damages the liver and may increase the risk of miscarriage and birth defects. Read More.

Toluene is a petroleum-derived chemical found in gasoline and used as a solvent in paints, adhesives and cleaning supplies. Toluene is highly neurotoxic. Exposure can cause fatigue and nausea, and may lead to nervous system disorders.

MORE ABOUT THIS CONTAMINANT

 

67

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
2014ND120ND
2015ND120ND
2016ND120ND
2017ND120ND
2018ND80ND
2019ND110ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 150 ppb

The EWG Health Guideline of 150 ppb for toluene 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) 1,000 ppb

The legal limit for toluene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-199588-012-0930ND
2014-02-199588-003-1000ND
2014-02-199588-002-1030ND
2014-04-299588-012-0950ND
2014-04-299588-003-1018ND
2014-04-299588-002-1029ND
2014-07-239588-012-0945ND
2014-07-239588-003-1010ND
2014-07-239588-002-1025ND
2014-12-109588-012-0924ND
2014-12-109588-003-0945ND
2014-12-109588-002-1020ND
2015-03-259588-003-0940ND
2015-03-259588-012-0926ND
2015-03-259588-002-0953ND
2015-04-239588-012-0947ND
2015-04-239588-003-1024ND
2015-04-239588-002-1041ND
2015-07-309588-012-0928ND
2015-07-309588-002-1044ND
2015-07-309588-003-1015ND
2015-10-289588-003-0945ND
2015-10-289588-002-1000ND
2015-10-289588-012-0915ND
2016-03-249588-003-1010ND
2016-03-249588-002-1024ND
2016-03-249588-012-0940ND
2016-06-099588-003-0923ND
2016-06-099588-002-0945ND
2016-06-099588-012-0909ND
2016-07-209588-002-1015ND
2016-07-209588-003-0945ND
2016-07-209588-012-0915ND
2016-10-129588-003-0928ND
2016-10-129588-002-0957ND
2016-10-129588-012-0914ND
2017-01-189588-012-0900ND
2017-01-189588-003-0920ND
2017-01-189588-002-0935ND
2017-04-179588-002-0930ND
2017-04-179588-012-0910ND
2017-04-179588-003-0952ND
2017-07-249588-003-0955ND
2017-07-249588-012-0923ND
2017-07-249588-002-1028ND
2017-10-189588-002-0950ND
2017-10-189588-003-0940ND
2017-10-189588-012-0914ND
2018-01-249588-002-0940ND
2018-01-249588-003-0920ND
2018-04-119588-002-0953ND
2018-04-119588-003-0930ND
2018-07-259588-002-1000ND
2018-07-259588-003-0935ND
2018-10-269588-002-0940ND
2018-10-269588-003-0920ND
2019-01-239588-003-0920ND
2019-01-239588-002-0950ND
2019-04-259588-002-1030ND
2019-04-259588-003-1005ND
2019-05-249588-012-0920ND
2019-07-259588-012-0930ND
2019-07-259588-002-1035ND
2019-07-259588-003-1010ND
2019-10-259588-012-0930ND
2019-10-259588-003-1040ND
2019-10-259588-002-1000ND