Antimony

Denver Water Board

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.

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121

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	N/A	0	0	N/A
2014	ND	24	0	ND
2015	0.0333 ppb	3	2	ND - 0.0500 ppb
2016	0.0200 ppb	3	1	ND - 0.0600 ppb
2017	0.0494 ppb	31	14	ND - 0.280 ppb
2018	0.0167 ppb	30	7	ND - 0.0900 ppb
2019	ND	30	0	ND

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	Result
2014-04-08	ND
2014-04-15	ND
2014-04-22	ND
2014-05-13	ND
2014-05-13	ND
2014-05-27	ND
2014-06-17	ND
2014-06-17	ND
2014-06-17	ND
2014-07-22	ND
2014-07-22	ND
2014-07-22	ND
2014-08-12	ND
2014-08-12	ND
2014-08-12	ND
2014-09-16	ND
2014-09-16	ND
2014-09-16	ND
2014-10-21	ND
2014-10-21	ND
2014-11-12	ND
2014-11-12	ND
2014-12-02	ND
2014-12-02	ND
2015-08-04	0.0500 ppb
2015-08-04	0.0500 ppb
2015-08-04	ND
2016-03-22	ND
2016-03-22	0.0600 ppb
2016-03-22	ND
2017-01-17	ND
2017-02-14	ND
2017-02-14	0.0700 ppb
2017-02-21	ND
2017-03-13	0.0600 ppb
2017-03-14	ND
2017-04-25	0.0600 ppb
2017-04-25	ND
2017-05-15	0.0600 ppb
2017-05-16	ND
2017-05-16	ND
2017-06-20	ND
2017-06-20	ND
2017-06-20	ND
2017-07-18	ND
2017-07-18	ND
2017-08-22	ND
2017-08-22	ND
2017-08-22	0.0500 ppb
2017-09-19	0.220 ppb
2017-09-19	0.230 ppb
2017-09-19	0.280 ppb
2017-10-17	ND
2017-10-17	0.0800 ppb
2017-10-17	0.0700 ppb
2017-11-15	0.110 ppb
2017-11-15	0.0900 ppb
2017-11-15	ND
2017-12-19	ND
2017-12-19	0.0900 ppb
2017-12-19	0.0600 ppb
2018-01-23	0.0600 ppb
2018-01-23	0.0900 ppb
2018-01-23	ND
2018-02-13	ND
2018-02-13	ND
2018-03-20	ND
2018-03-20	0.0500 ppb
2018-04-17	ND
2018-04-17	ND
2018-04-24	0.0900 ppb
2018-05-15	ND
2018-05-15	ND
2018-05-15	0.0700 ppb
2018-06-19	ND
2018-06-19	ND
2018-06-19	0.0900 ppb
2018-07-02	ND
2018-07-02	ND
2018-07-02	ND
2018-08-07	ND
2018-08-07	ND
2018-08-07	ND
2018-09-04	ND
2018-09-04	0.0500 ppb
2018-09-04	ND
2018-10-02	ND
2018-10-02	ND
2018-10-23	ND
2018-11-06	ND
2018-11-06	ND
2019-01-08	ND
2019-01-08	ND
2019-02-05	ND
2019-02-05	ND
2019-03-05	ND
2019-03-05	ND
2019-04-02	ND
2019-04-02	ND
2019-05-07	ND
2019-05-07	ND
2019-05-07	ND
2019-06-04	ND
2019-06-04	ND
2019-06-04	ND
2019-07-02	ND
2019-07-02	ND
2019-07-02	ND
2019-08-06	ND
2019-08-06	ND
2019-08-06	ND
2019-09-10	ND
2019-09-10	ND
2019-09-10	ND
2019-10-08	ND
2019-10-08	ND
2019-10-08	ND
2019-11-05	ND
2019-11-05	ND
2019-12-03	ND
2019-12-03	ND