Thallium

Cal-water Service Company - Marysville

Thalium is a naturally occurring metal released into the environment from metal smelting and coal burning. Exposure to too much thalium can cause hair loss, liver damage, reduced sperm motility and nervous system impairment.

MORE ABOUT THIS CONTAMINANT

151

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	0.00136 ppb	44	13	ND - 0.01000 ppb
2015	0.000891 ppb	46	3	ND - 0.0190 ppb
2016	ND	20	0	ND
2017	ND	15	0	ND
2018	ND	16	0	ND
2019	ND	10	0	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for thallium 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 harm to internal organs.

EPA Maximum Contaminant
Level (MCL) 2 ppb

The legal limit for thallium, established in 1992, was based on analytical detection limits at the time that the standard was set.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-05-03	5701-019-1549	ND
2014-05-04	5701-011-0819	0.00300 ppb
2014-05-04	5701-015-1122	ND
2014-05-04	5701-018-1559	ND
2014-05-04	5701-020-1126	ND
2014-05-19	5810-011-1320	ND
2014-06-02	5701-011-0839	0.00400 ppb
2014-06-02	5701-015-0822	0.00200 ppb
2014-06-02	5701-020-0824	ND
2014-06-03	5701-018-0850	0.00300 ppb
2014-06-03	5701-019-1008	0.00400 ppb
2014-07-07	5701-009-1145	0.001000 ppb
2014-07-07	5701-011-0833	0.001000 ppb
2014-07-07	5701-012-0948	ND
2014-07-07	5701-015-1349	0.00800 ppb
2014-07-07	5701-016-1415	ND
2014-07-07	5701-018-1417	ND
2014-07-07	5701-019-0949	ND
2014-07-07	5701-020-1347	0.01000 ppb
2014-08-02	5701-011-0953	ND
2014-09-07	5701-011-0840	ND
2014-09-07	5701-015-0814	ND
2014-09-07	5701-018-1104	ND
2014-09-07	5701-019-1139	ND
2014-09-07	5701-020-0815	ND
2014-10-01	5701-008-1220	ND
2014-10-01	5701-009-1050	ND
2014-10-02	5701-016-1205	ND
2014-10-02	5701-018-1206	ND
2014-10-03	5701-015-1049	ND
2014-10-03	5701-020-1050	ND
2014-10-04	5701-012-1420	ND
2014-10-04	5701-019-1421	ND
2014-10-06	5701-011-0921	ND
2014-10-06	5701-013-1207	ND
2014-10-12	5701-011-0829	ND
2014-10-14	5810-013-1318	ND
2014-10-27	5701-011-0924	ND
2014-11-17	5810-008-1318	ND
2014-12-13	5701-015-1322	0.00500 ppb
2014-12-13	5701-020-1324	0.00200 ppb
2014-12-14	5701-011-1322	0.00800 ppb
2014-12-14	5701-018-0957	ND
2014-12-14	5701-023-1324	0.00900 ppb
2015-01-12	5810-009-1329	ND
2015-01-12	5701-009-1334	ND
2015-01-12	5701-010-1631	ND
2015-01-12	5701-012-1357	ND
2015-01-12	5810-012-1414	ND
2015-01-12	5701-019-1358	ND
2015-01-13	5701-011-1016	ND
2015-01-13	5701-015-1308	ND
2015-01-13	5701-016-1535	ND
2015-01-13	5701-018-1536	ND
2015-01-13	5701-020-1309	ND
2015-01-13	5701-023-1017	ND
2015-02-02	5701-011-0937	ND
2015-02-02	5701-015-1055	ND
2015-02-02	5701-018-1329	ND
2015-02-02	5701-020-1059	ND
2015-02-02	5701-023-0939	ND
2015-02-03	5701-019-1333	ND
2015-04-01	5701-015-1356	ND
2015-04-01	5701-020-1558	ND
2015-04-02	5701-011-1532	ND
2015-04-02	5701-012-1514	ND
2015-04-02	5701-019-1515	ND
2015-04-02	5701-023-1534	ND
2015-04-03	5701-009-0907	ND
2015-04-03	5701-016-1122	ND
2015-04-03	5701-018-1123	ND
2015-04-06	5810-010-1310	ND
2015-05-12	5701-020-1327	0.0180 ppb
2015-05-13	5701-011-0952	ND
2015-05-13	5701-018-0837	0.0190 ppb
2015-05-13	5701-023-0954	ND
2015-06-01	5701-011-0837	0.00400 ppb
2015-06-01	5701-015-1302	ND
2015-06-01	5701-018-1005	ND
2015-06-01	5701-019-1303	ND
2015-08-19	5810-015-1053	ND
2015-09-06	5701-019-1601	ND
2015-09-07	5701-011-0913	ND
2015-09-07	5701-015-1607	ND
2015-09-07	5701-018-0809	ND
2015-09-07	5701-020-1608	ND
2015-09-07	5701-023-0910	ND
2015-12-01	5701-011-1311	ND
2015-12-01	5701-018-1543	ND
2015-12-01	5701-023-1312	ND
2016-02-09	5701-011-1113	ND
2016-02-09	5701-018-1347	ND
2016-02-09	5701-023-1111	ND
2016-02-16	5810-016-1429	ND
2016-03-02	5701-011-1003	ND
2016-03-02	5701-018-1257	ND
2016-03-02	5701-023-1001	ND
2016-03-07	5810-011-1306	ND
2016-04-05	5701-009-0830	ND
2016-04-05	5701-011-0843	ND
2016-04-05	5701-013-1006	ND
2016-04-05	5701-016-1017	ND
2016-04-05	5701-018-1019	ND
2016-04-05	5701-023-0840	ND
2016-05-02	5701-018-1124	ND
2016-05-02	5701-023-0847	ND
2016-07-05	5701-020-1313	ND
2016-07-05	5701-023-1338	ND
2016-07-06	5701-018-1008	ND
2016-12-20	5810-008-1305	ND
2017-01-05	5701-009-1554	ND
2017-01-05	5701-011-1011	ND
2017-01-05	5701-016-1317	ND
2017-01-05	5701-018-1319	ND
2017-01-05	5701-023-1013	ND
2017-02-02	5701-011-0946	ND
2017-02-02	5701-018-1206	ND
2017-02-02	5701-023-0948	ND
2017-03-22	5810-013-1401	ND
2017-04-05	5701-009-1005	ND
2017-04-05	5701-011-1400	ND
2017-04-05	5701-013-1021	ND
2017-04-05	5701-016-1339	ND
2017-04-05	5701-018-1341	ND
2017-04-05	5701-023-1402	ND
2018-01-14	5701-015-1440	ND
2018-01-15	5701-012-1526	ND
2018-01-17	5810-009-1400	ND
2018-02-05	5701-018-1411	ND
2018-02-05	5701-023-1122	ND
2018-03-13	5701-011-1308	ND
2018-03-13	5701-018-1450	ND
2018-03-13	5701-023-1314	ND
2018-04-09	5701-016-1441	ND
2018-04-09	5701-018-1444	ND
2018-04-09	5701-023-1009	ND
2018-04-10	5701-013-1300	ND
2018-04-17	5810-010-1316	ND
2018-05-15	5810-012-1433	ND
2018-08-07	5810-015-1355	ND
2018-08-13	5701-011-1109	ND
2019-02-13	5810-016-1035	ND
2019-03-19	5810-011-1316	ND
2019-03-19	5701-011-1324	ND
2019-03-19	5701-023-1326	ND
2019-03-20	5701-018-1036	ND
2019-04-08	5701-016-0940	ND
2019-04-08	5701-018-0941	ND
2019-04-08	5701-023-1419	ND
2019-04-09	5701-009-1451	ND
2019-04-09	5701-013-1701	ND