Naphthalene

Gonzales County Water Supply Corporation

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	9	ND
2015	ND	11	ND
2016	ND	9	ND
2017	ND	8	ND
2018	ND	10	ND
2019	ND	8	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-20	AC43865	ND
2014-06-05	AC56115	ND
2014-06-05	AC56117	ND
2014-06-05	AC56116	ND
2014-06-05	AC56112	ND
2014-06-05	AC56103	ND
2014-06-05	AC56119	ND
2014-09-05	AC66108	ND
2014-09-05	AC66060	ND
2015-02-04	AC79333	ND
2015-02-04	AC79281	ND
2015-02-04	AC79273	ND
2015-02-04	AC79275	ND
2015-02-04	AC79291	ND
2015-02-04	AC79349	ND
2015-02-04	AC79332	ND
2015-02-04	AC79331	ND
2015-02-04	AC79334	ND
2015-07-22	AD00677	ND
2015-07-22	AD00644	ND
2016-01-19	AD18758	ND
2016-01-19	AD18756	ND
2016-01-19	AD18754	ND
2016-01-19	AD18753	ND
2016-01-19	AD18755	ND
2016-01-19	AD18652	ND
2016-01-19	AD18620	ND
2016-05-02	AD34906	ND
2016-09-09	AD49182	ND
2017-03-13	AD75568	ND
2017-03-13	AD75566	ND
2017-03-13	AD75567	ND
2017-03-13	AD75569	ND
2017-03-13	AD75502	ND
2017-03-13	AD75498	ND
2017-03-13	AD75500	ND
2017-04-26	AD81301	ND
2018-02-08	AE13124	ND
2018-02-08	AE13037	ND
2018-03-12	AE18013	ND
2018-03-12	AE17842	ND
2018-03-12	AE17882	ND
2018-03-12	AE17864	ND
2018-03-12	AE18016	ND
2018-03-12	AE18015	ND
2018-03-12	AE18012	ND
2018-12-12	AE48728	ND
2019-01-09	AE49241	ND
2019-01-09	AE49237	ND
2019-03-05	AE57242	ND
2019-03-05	AE57240	ND
2019-03-05	AE57236	ND
2019-03-05	AE57237	ND
2019-03-05	AE57238	ND
2019-03-05	AE57239	ND