Know Your Environment. Protect Your Health.

Xylenes (total)

City of Leon Valley

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.

 

47

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.113 ppb81ND - 0.900 ppb
20196.83 ppb72ND - 46.0 ppb
20201.16 ppb86ND - 1.90 ppb
20211.35 ppb83ND - 7.20 ppb
20221.01 ppb84ND - 2.90 ppb
20230.250 ppb82ND - 1.20 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
2018-01-23AE09914ND
2018-03-02AE16656ND
2018-04-26AE24190ND
2018-04-26AE24188ND
2018-08-17AE37649ND
2018-08-17AE37653ND
2018-10-26AE44764ND
2018-10-26AE447660.900 ppb
2019-03-01AE56915ND
2019-03-01AE56919ND
2019-04-25AE63758ND
2019-07-19AE75356ND
2019-07-19AE7535846.0 ppb
2019-10-09AE86133ND
2019-10-09AE861351.80 ppb
2020-01-30AE963231.80 ppb
2020-03-25AF045281.20 ppb
2020-04-09AF063031.90 ppb
2020-04-09AF063051.30 ppb
2020-07-08AF18899ND
2020-07-08AF189011.90 ppb
2020-11-02AF328381.20 ppb
2020-11-02AF32840ND
2021-01-14AF39552ND
2021-01-14AF395587.20 ppb
2021-04-01AF48854ND
2021-05-13AF53869ND
2021-08-03AF64491ND
2021-08-03AF644930.900 ppb
2021-12-09AF784972.70 ppb
2021-12-09AF78505ND
2022-02-14AF84680ND
2022-02-14AF846822.00 ppb
2022-04-28AF948372.90 ppb
2022-04-28AF94841ND
2022-07-15AG049712.50 ppb
2022-07-15AG04973ND
2022-10-18AG17425ND
2022-10-18AG174270.700 ppb
2023-02-17AG29691ND
2023-02-17AG296950.800 ppb
2023-04-21AG37706ND
2023-04-21AG377381.20 ppb
2023-08-14AG52400ND
2023-08-14AG52408ND
2023-10-06AG58929ND
2023-10-06AG58931ND