Naphthalene

Harris County FWSD 61

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
2014	ND	3	ND
2015	ND	10	ND
2016	ND	6	ND
2017	ND	10	ND
2018	ND	11	ND
2019	ND	9	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-04	AC41390	ND
2014-02-04	AC41388	ND
2014-02-04	AC41253	ND
2015-04-01	AC87009	ND
2015-04-01	AC87003	ND
2015-04-01	AC87002	ND
2015-04-01	AC87004	ND
2015-04-01	AC86960	ND
2015-04-01	AC86966	ND
2015-04-01	AC86972	ND
2015-04-01	AC86968	ND
2015-09-18	AD07856	ND
2015-10-12	AD10264	ND
2016-01-12	AD17689	ND
2016-01-12	AD17687	ND
2016-01-12	AD17578	ND
2016-01-12	AD17584	ND
2016-01-12	AD17592	ND
2016-01-12	AD17582	ND
2017-02-02	AD68423	ND
2017-02-02	AD68514	ND
2017-02-02	AD68515	ND
2017-02-02	AD68419	ND
2017-02-02	AD68455	ND
2017-02-02	AD68425	ND
2017-03-15	AD75284	ND
2017-04-26	AD81294	ND
2017-07-12	AD89121	ND
2017-10-13	AE00919	ND
2018-03-01	AE16316	ND
2018-03-01	AE16320	ND
2018-03-01	AE16344	ND
2018-03-01	AE16318	ND
2018-03-01	AE16449	ND
2018-03-01	AE16448	ND
2018-03-01	AE16447	ND
2018-03-01	AE16450	ND
2018-05-29	AE27949	ND
2018-08-30	AE39012	ND
2018-10-03	AE42597	ND
2019-01-09	AE49223	ND
2019-01-09	AE49221	ND
2019-01-09	AE49215	ND
2019-01-09	AE49217	ND
2019-02-08	AE53913	ND
2019-02-08	AE53911	ND
2019-04-01	AE60761	ND
2019-07-19	AE75416	ND
2019-10-03	AE85713	ND