Know Your Environment. Protect Your Health.

Xylenes (total)

Lcra Harper Water System

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.

 

7

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
20190.500 ppb110.500 ppb
20200.250 ppb21ND - 0.500 ppb
202162.0 ppb1162.0 ppb
20228.20 ppb118.20 ppb
20233.70 ppb113.70 ppb

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
2018-02-26AE15411ND
2019-06-13AE705970.500 ppb
2020-03-11AF022860.500 ppb
2020-05-21Q2021336001ND
2021-06-22AF5905962.0 ppb
2022-03-29AF910358.20 ppb
2023-04-19AG373493.70 ppb