Naphthalene

City of Laredo

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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2013	N/A	0	N/A
2014	ND	2	ND
2015	ND	10	ND
2016	ND	6	ND
2017	ND	6	ND
2018	ND	10	ND
2019	ND	6	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-19	AC43653	ND
2014-08-22	AC65086	ND
2015-03-16	AC84519	ND
2015-09-15	AD07131	ND
2015-11-17	AD13919	ND
2015-11-17	AD13862	ND
2015-11-18	AD14069	ND
2015-11-18	AD14073	ND
2015-11-18	AD14107	ND
2015-11-18	AD14108	ND
2015-12-14	AD16884	ND
2015-12-14	AD16823	ND
2016-02-16	AD23653	ND
2016-06-20	AD41421	ND
2016-06-20	AD41389	ND
2016-07-21	AD45249	ND
2016-07-21	AD45263	ND
2016-07-21	AD45241	ND
2017-02-21	AD71288	ND
2017-02-21	AD71345	ND
2017-09-05	AD94761	ND
2017-09-05	AD94763	ND
2017-09-05	AD94765	ND
2017-12-05	AE06800	ND
2018-03-05	AE16785	ND
2018-07-16	AE33649	ND
2018-07-16	AE33575	ND
2018-07-16	AE33571	ND
2018-10-16	AE43683	ND
2018-10-16	AE43640	ND
2018-10-16	AE43642	ND
2018-10-16	AE43638	ND
2018-10-16	AE43682	ND
2018-10-16	AE43684	ND
2019-03-11	AE57934	ND
2019-03-11	AE57867	ND
2019-06-06	AE69489	ND
2019-08-20	AE79960	ND
2019-08-20	AE79958	ND
2019-08-20	AE79956	ND