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EWG's Tap Water Database — 2021 UPDATE

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Naphthalene

San Diego County Water Authority

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.

MORE ABOUT THIS CONTAMINANT

 

47

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
2015ND80ND
2016ND70ND
2017ND80ND
2018ND80ND
2019ND60ND

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-059590-003-1102ND
2014-02-059590-003-1048ND
2014-04-099590-003-1424ND
2014-04-099590-003-1329ND
2014-07-249590-003-1229ND
2014-07-249590-003-1210ND
2014-12-169590-003-1143ND
2014-12-169590-003-1136ND
2014-12-299590-001-1010ND
2014-12-299590-001-0945ND
2015-01-059590-003-1039ND
2015-01-059590-003-0937ND
2015-04-089590-003-1410ND
2015-04-089590-003-1429ND
2015-08-259590-003-1306ND
2015-08-259590-003-1333ND
2015-10-209590-003-1143ND
2015-10-209590-003-1202ND
2016-02-109590-003-1309ND
2016-02-109590-003-1340ND
2016-06-169590-003-1435ND
2016-06-169590-003-1358ND
2016-08-029590-003-1058ND
2016-08-029590-003-1135ND
2016-11-299590-003-1309ND
2017-03-149590-003-1412ND
2017-03-309590-003-1230ND
2017-06-149590-003-0906ND
2017-06-149590-003-0942ND
2017-07-059590-003-1106ND
2017-07-059590-003-1134ND
2017-10-169590-003-1247ND
2017-10-169590-003-1305ND
2018-01-039590-003-1215ND
2018-01-039590-003-1157ND
2018-04-109590-003-1230ND
2018-04-109590-003-1200ND
2018-09-179590-003-1218ND
2018-09-179590-003-1140ND
2018-10-019590-003-1326ND
2018-10-019590-003-1255ND
2019-06-139590-003-1044ND
2019-06-139590-003-0946ND
2019-09-179590-003-1230ND
2019-09-179590-003-1144ND
2019-12-119590-003-0724ND
2019-12-119590-003-0803ND