Know Your Environment. Protect Your Health.

Toluene

Western Hills Water System

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND40ND
2021ND50ND
2022ND40ND
2023ND40ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-09-18AE40735ND
2018-09-18AE40745ND
2018-09-18AE40749ND
2018-09-18AE40729ND
2019-06-17AE71090ND
2019-06-17AE71098ND
2019-06-17AE71118ND
2019-06-17AE71138ND
2020-06-15AF15206ND
2020-06-15AF15208ND
2020-06-15AF15210ND
2020-06-15AF15214ND
2021-08-03AF64447ND
2021-08-03AF64455ND
2021-08-03AF64451ND
2021-09-23AF71029ND
2021-10-14AF73603ND
2022-03-22AF90050ND
2022-03-22AF90052ND
2022-03-22AF90054ND
2022-10-04AG15920ND
2023-07-12AG48162ND
2023-07-12AG48172ND
2023-07-12AG48178ND
2023-07-12AG48180ND