Antimony

California Water Service - Stockton

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

202

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.0538 ppb	73	60	ND - 0.201 ppb
2015	0.0375 ppb	34	20	ND - 0.135 ppb
2016	ND	17	0	ND
2017	ND	42	0	ND
2018	ND	28	0	ND
2019	ND	8	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	Lab ID	Result
2014-02-05	5810-013-1312	ND
2014-04-02	5810-015-1131	ND
2014-04-28	5810-013-1211	ND
2014-04-28	5810-050-1115	ND
2014-05-06	5701-131-0943	0.0880 ppb
2014-05-07	5810-055-1159	ND
2014-05-27	5701-131-0959	0.0950 ppb
2014-05-30	5701-130-1135	0.0860 ppb
2014-06-03	5701-130-1121	0.0750 ppb
2014-06-03	5810-130-1125	ND
2014-06-03	5701-131-1125	0.0550 ppb
2014-06-03	5701-132-1229	0.102 ppb
2014-06-03	5810-132-1252	ND
2014-06-04	5810-058-1024	ND
2014-06-09	5701-131-1004	0.0520 ppb
2014-06-17	5701-131-1613	0.0480 ppb
2014-06-23	5701-131-1224	0.0420 ppb
2014-06-25	5701-028-0945	0.0920 ppb
2014-06-25	5701-045-1435	0.00500 ppb
2014-06-25	5701-053-1158	0.0840 ppb
2014-06-25	5810-053-1203	ND
2014-06-25	5701-069-1003	0.0930 ppb
2014-06-25	5701-130-1110	0.0420 ppb
2014-07-01	5701-065-1055	0.130 ppb
2014-07-01	5701-131-0950	0.0470 ppb
2014-07-02	5701-013-1400	0.137 ppb
2014-07-07	5701-131-1057	0.0390 ppb
2014-07-08	5701-028-0956	0.0630 ppb
2014-07-08	5701-045-1330	ND
2014-07-08	5701-053-0750	0.0670 ppb
2014-07-08	5701-069-1040	0.0240 ppb
2014-07-08	5701-130-0906	0.0500 ppb
2014-07-15	5701-131-1030	0.0510 ppb
2014-07-21	5701-131-1146	0.0630 ppb
2014-07-30	5810-029-1109	ND
2014-08-05	5701-028-1124	0.0680 ppb
2014-08-05	5701-045-1345	0.0120 ppb
2014-08-05	5701-053-1417	0.0960 ppb
2014-08-05	5701-069-1023	0.0540 ppb
2014-08-05	5701-130-1110	0.0590 ppb
2014-08-12	5701-131-1350	0.0660 ppb
2014-08-19	5701-131-1056	0.0420 ppb
2014-08-26	5701-131-1018	0.0420 ppb
2014-09-02	5701-131-1150	0.0530 ppb
2014-09-29	5701-131-1022	0.127 ppb
2014-09-30	5701-132-1148	0.0770 ppb
2014-10-07	5701-131-1120	0.145 ppb
2014-10-14	5701-131-1058	0.0550 ppb
2014-10-20	5701-131-0954	0.0390 ppb
2014-10-27	5701-131-1210	0.0720 ppb
2014-10-28	5701-028-1242	0.0660 ppb
2014-10-28	5701-045-1307	0.0340 ppb
2014-10-28	5701-053-1330	0.201 ppb
2014-10-28	5701-069-1250	0.0790 ppb
2014-11-03	5701-131-0927	0.0930 ppb
2014-11-04	5701-028-1344	0.0730 ppb
2014-11-04	5701-045-1110	0.0210 ppb
2014-11-04	5701-053-1350	0.141 ppb
2014-11-04	5701-069-0930	0.0770 ppb
2014-11-04	5701-130-1048	0.0490 ppb
2014-11-18	5810-062-1326	ND
2014-12-08	5701-131-1033	0.0310 ppb
2014-12-10	5701-130-1410	0.102 ppb
2014-12-10	5701-132-1424	0.0310 ppb
2014-12-15	5701-131-1048	0.0230 ppb
2014-12-17	5701-045-1422	ND
2014-12-17	5701-053-1104	0.0750 ppb
2014-12-17	5701-069-1820	0.00900 ppb
2014-12-17	5701-130-1118	0.0210 ppb
2014-12-30	5701-058-1418	0.0820 ppb
2014-12-30	5701-063-0945	0.0270 ppb
2014-12-30	5701-064-1155	0.0280 ppb
2014-12-30	5701-067-1115	0.0270 ppb
2015-01-12	5701-131-1043	0.0470 ppb
2015-01-20	5701-131-1031	0.0590 ppb
2015-01-22	5701-054-1239	0.125 ppb
2015-01-22	5810-054-1248	ND
2015-01-26	5701-131-1116	0.0500 ppb
2015-02-09	5701-131-0923	0.0530 ppb
2015-02-17	5701-131-1112	0.0680 ppb
2015-03-02	5701-131-1017	0.135 ppb
2015-03-04	5701-045-1208	0.01000 ppb
2015-03-04	5701-053-1430	0.0850 ppb
2015-03-11	5701-018-1257	0.0320 ppb
2015-04-06	5701-131-1021	0.0720 ppb
2015-04-07	5701-028-1347	0.0580 ppb
2015-04-07	5701-045-1115	0.0200 ppb
2015-04-07	5701-053-1406	0.126 ppb
2015-04-08	5810-051-1231	ND
2015-04-27	5810-050-1210	ND
2015-05-12	5810-018-0655	ND
2015-05-20	5810-007-1145	ND
2015-05-20	5810-028-1020	ND
2015-06-03	5701-045-1139	0.0240 ppb
2015-06-03	5701-053-1405	0.105 ppb
2015-07-14	5810-056-1420	ND
2015-07-15	5701-028-1109	0.0690 ppb
2015-07-15	5701-045-1140	0.001000 ppb
2015-07-15	5701-053-1340	0.0760 ppb
2015-07-21	5701-131-1050	0.0590 ppb
2015-08-16	1610-133-1900	ND
2015-10-15	5701-060-1200	ND
2015-10-15	5701-060-1211	ND
2015-10-15	5810-060-1245	ND
2015-11-19	5810-059-1021	ND
2015-12-09	5810-018-0523	ND
2015-12-29	5701-062-0958	ND
2016-02-01	5701-131-1117	ND
2016-02-16	5701-131-0930	ND
2016-02-22	5810-052-0736	ND
2016-02-22	5810-067-0916	ND
2016-02-23	5810-061-1150	ND
2016-03-07	5701-131-0920	ND
2016-04-06	5701-061-0953	ND
2016-05-09	5701-131-1113	ND
2016-05-10	5810-045-1040	ND
2016-05-16	5701-131-1012	ND
2016-05-23	5701-131-1133	ND
2016-08-15	5701-131-0954	ND
2016-10-11	5701-131-1125	ND
2016-10-18	5701-028-0953	ND
2016-10-18	5701-045-0933	ND
2016-10-19	5810-064-1200	ND
2016-11-08	5810-063-1145	ND
2017-01-06	5701-028-1220	ND
2017-01-06	5701-045-1150	ND
2017-01-06	5701-053-1120	ND
2017-01-06	5701-061-1045	ND
2017-01-09	5701-131-1040	ND
2017-01-17	5701-131-1035	ND
2017-02-02	5701-051-1120	ND
2017-02-06	5701-069-0935	ND
2017-02-06	5701-131-0945	ND
2017-02-07	5701-045-1128	ND
2017-02-07	5701-053-1313	ND
2017-02-07	5701-059-1359	ND
2017-02-07	5701-060-1427	ND
2017-02-07	5701-130-1023	ND
2017-04-18	5810-015-1348	ND
2017-04-24	5810-007-1010	ND
2017-05-01	5701-069-1247	ND
2017-05-01	5701-131-1302	ND
2017-05-03	5701-007-1516	ND
2017-05-03	5701-051-1306	ND
2017-05-03	5701-055-1427	ND
2017-05-15	5810-055-1508	ND
2017-05-15	5701-131-1055	ND
2017-05-22	5701-131-0850	ND
2017-05-24	5810-018-1052	ND
2017-06-06	5701-130-1510	ND
2017-06-08	5810-058-1152	ND
2017-06-12	5810-132-1026	ND
2017-06-13	5810-053-0930	ND
2017-06-13	5810-130-1250	ND
2017-07-17	5701-131-1324	ND
2017-07-18	5701-028-1322	ND
2017-07-19	5701-045-0935	ND
2017-07-19	5701-053-0925	ND
2017-07-19	5701-061-1039	ND
2017-07-25	5701-015-1155	ND
2017-08-15	5810-029-1255	ND
2017-09-18	5701-131-1152	ND
2017-10-02	5701-131-1340	ND
2017-11-08	5810-062-1455	ND
2017-11-28	5701-131-1248	ND
2017-12-13	5810-050-1050	ND
2018-01-04	5701-028-1108	ND
2018-01-04	5701-045-1246	ND
2018-01-04	5701-053-1329	ND
2018-01-04	5701-061-1428	ND
2018-02-05	5701-069-1450	ND
2018-02-05	5701-131-1500	ND
2018-02-07	5701-045-1035	ND
2018-02-07	5701-053-1410	ND
2018-02-07	5701-059-1230	ND
2018-02-07	5701-060-1130	ND
2018-02-07	5701-130-1510	ND
2018-04-09	5701-131-0925	ND
2018-04-11	5810-051-1335	ND
2018-04-12	5701-133-1005	ND
2018-05-01	5810-054-1330	ND
2018-05-02	5701-045-1345	ND
2018-05-02	5701-053-1255	ND
2018-05-02	5701-059-1045	ND
2018-05-02	5701-060-1000	ND
2018-05-02	5701-130-1435	ND
2018-06-07	5810-059-1340	ND
2018-06-07	5810-060-1250	ND
2018-06-25	5701-131-0930	ND
2018-07-18	5810-056-1225	ND
2018-08-15	5810-133-1335	ND
2018-08-28	5810-028-1130	ND
2018-10-09	5810-028-1205	ND
2018-12-18	5701-131-1335	ND
2019-01-10	5810-061-1020	ND
2019-02-13	5810-052-1252	ND
2019-02-13	5810-067-1349	ND
2019-05-08	5701-051-1155	ND
2019-05-08	5701-059-1441	ND
2019-05-08	5701-060-1440	ND
2019-05-08	5701-130-1333	ND
2019-11-12	5810-063-1115	ND