Know Your Environment. Protect Your Health.

Toluene

Gowc North 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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND10ND
202113.9 ppb31ND - 41.7 ppb
2022ND70ND
2023ND70ND

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
2020-12-0235596280001ND
2021-02-0135608834004ND
2021-05-0335630681004ND
2021-05-033563068100541.7 ppb
2022-02-0935696474003ND
2022-02-0935696474004ND
2022-04-0435708518003ND
2022-04-0435708518004ND
2022-09-2735750438002ND
2022-10-2435755885002ND
2022-10-2435755885001ND
2023-01-2335774809001ND
2023-01-2735777481001ND
2023-02-2235781903001ND
2023-04-0335790249001ND
2023-04-0335790249002ND
2023-07-1035812564001ND
2023-07-1035812564002ND