Antimony

City of Opelousas Water System

Antimony is a naturally occurring metal that enters tap water from plumbing fittings and also from industrial uses, such as production of metal alloys, batteries and plastics. Antimony causes organ damage and shortens lifespans in studies of laboratory animals.

MORE ABOUT THIS CONTAMINANT

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	4	ND
2015	ND	10	ND
2016	N/A	0	N/A
2017	ND	4	ND
2018	ND	10	ND
2019	N/A	0	N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1 ppb

The EWG Health Guideline of 1 ppb for antimony was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against change to the stomach and intestines.

EPA Maximum Contaminant
Level (MCL) 6 ppb

The legal limit for antimony, established in 1992, was based on a toxicity study in laboratory animals published in 1970. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-09-08	AD96563	ND
2014-09-08	AD96563	ND
2014-10-06	AD98296	ND
2014-10-06	AD98296	ND
2015-03-09	35178831003	ND
2015-03-09	35178831001	ND
2015-03-09	35178831002	ND
2015-03-09	35178831003	ND
2015-03-09	35178831005	ND
2015-03-09	35178831004	ND
2015-03-09	35178831002	ND
2015-03-09	35178831001	ND
2015-03-09	35178831004	ND
2015-03-09	35178831005	ND
2017-09-18	AE18148	ND
2017-09-18	AE18132	ND
2017-09-18	AE18148	ND
2017-09-18	AE18132	ND
2018-01-09	AE20404	ND
2018-01-09	AE20420	ND
2018-01-09	AE20416	ND
2018-01-09	AE20412	ND
2018-01-09	AE20408	ND
2018-01-09	AE20404	ND
2018-01-09	AE20420	ND
2018-01-09	AE20416	ND
2018-01-09	AE20412	ND
2018-01-09	AE20408	ND