Know Your Environment. Protect Your Health.

Xylenes (total)

Regional Water Authority

Xylenes are solvents used in industrial and consumer products, such as cleaning agents and paint thinners. Xylenes cause nervous system damage and may harm developing fetuses.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND30ND
2020ND30ND
2021ND40ND
2022ND30ND
2023ND90ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 1,800 ppb

The EWG Health Guideline of 1,800 ppb for xylenes 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 the brain and nervous system.

EPA Maximum Contaminant
Level (MCL): 10,000 ppb

The legal limit for xylenes, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s. This limit may not fully protect against harm to the brain and nervous system due to xylene exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2018-03-05ND
2018-03-06ND
2018-08-17ND
2018-11-29ND
2019-03-04ND
2019-03-05ND
2019-05-08ND
2020-03-02ND
2020-03-03ND
2020-03-05ND
2021-03-08ND
2021-03-09ND
2021-03-10ND
2021-09-14ND
2022-03-07ND
2022-03-08ND
2022-03-09ND
2023-02-06ND
2023-02-21ND
2023-03-06ND
2023-03-07ND
2023-03-08ND
2023-03-09ND
2023-06-05ND
2023-06-06ND
2023-06-07ND