Know Your Environment. Protect Your Health.

Xylenes (total)

Chalk Hill Special Utility District

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.230 ppb31ND - 0.690 ppb
20194.43 ppb42ND - 17.2 ppb
20201.14 ppb42ND - 3.46 ppb
20210.207 ppb31ND - 0.620 ppb
20220.187 ppb31ND - 0.560 ppb
2023ND30ND

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
2018-06-20Q1824487007ND
2018-06-20Q18244870090.690 ppb
2018-06-20Q1824487006ND
2019-01-10Q19014110030.500 ppb
2019-04-08Q1914000002ND
2019-04-08Q191400000517.2 ppb
2019-04-08Q1914000006ND
2020-03-23Q20121830033.46 ppb
2020-05-21Q20203690011.11 ppb
2020-12-17Q2050083008ND
2020-12-17Q2050083006ND
2021-11-09Q21313590120.620 ppb
2021-11-09Q2131359014ND
2021-11-09Q2131359016ND
2022-12-13Q2237298001ND
2022-12-13Q2237298003ND
2022-12-13Q22372980050.560 ppb
2023-03-20Q2310465003ND
2023-05-23Q2319409005ND
2023-05-23Q2319409007ND