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EWG's Tap Water Database — 2021 UPDATE

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Naphthalene

Danville

Naphthalene is a polycyclic aromatic hydrocarbon, or PAH, released from combustion of fossil fuels and waste incinerators, and also used as a moth repellent. PAHs increase the risk of cancer; damage the immune, nervous and reproductive systems; and can harm developing fetuses.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND20ND
2016ND80ND
2017ND30ND
2018ND20ND
2019ND30ND

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-1814079006801ND
2014-05-1314135000901ND
2014-11-1814324003901ND
2015-05-0615127002201ND
2015-10-2115295005501ND
2016-01-1216015000209ND
2016-01-1216015000207ND
2016-01-1216015000107ND
2016-03-0716070000901ND
2016-03-0716070000601ND
2016-05-1716140000901ND
2016-05-1716140001101ND
2016-10-1216288004601ND
2017-01-1117013000201ND
2017-04-1017103003401ND
2017-10-1617292000601ND
2018-05-0818130007601ND
2018-10-0818283004201ND
2019-01-1619017008009ND
2019-01-1619017008007ND
2019-01-1619017007907ND