Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Thallium

California American Water Company - Monterey

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

 

59

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND100ND
2015ND20ND
2016ND230ND
2017ND10ND
2018ND10ND
2019ND220ND

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
2014-01-211225-089-1140ND
2014-01-221225-092-1145ND
2014-02-181225-054-1225ND
2014-04-081225-082-1125ND
2014-04-101225-061-1250ND
2014-04-241225-092-1005ND
2014-04-291225-089-1030ND
2014-05-051225-079-1420ND
2014-06-111225-053-1000ND
2014-12-231225-085-0915ND
2015-02-101225-085-1330ND
2015-04-091225-082-0935ND
2016-01-071225-085-1505ND
2016-01-121225-046-1355ND
2016-01-205810-087-1055ND
2016-02-081225-017-1000ND
2016-02-081225-016-1030ND
2016-02-081225-047-1100ND
2016-02-081225-045-1200ND
2016-02-081225-044-1230ND
2016-04-061225-024-1410ND
2016-04-071225-082-1010ND
2016-04-191225-051-1100ND
2016-04-191225-029-1000ND
2016-04-261225-048-1115ND
2016-05-121225-052-1010ND
2016-06-071225-026-1045ND
2016-06-071225-072-1000ND
2016-06-071225-073-1020ND
2016-06-081225-074-1315ND
2016-06-081225-002-1330ND
2016-06-081225-006-1300ND
2016-08-221225-070-1010ND
2016-08-291225-050-1215ND
2016-12-201225-085-1135ND
2017-04-171225-082-1045ND
2018-05-011225-082-0920ND
2019-01-151225-085-1545ND
2019-02-071225-017-1300ND
2019-02-071225-016-1335ND
2019-02-071225-047-1515ND
2019-02-071225-046-1430ND
2019-02-071225-045-1710ND
2019-02-071225-044-1650ND
2019-03-191225-051-1230ND
2019-03-191225-029-1330ND
2019-03-201225-024-1228ND
2019-03-211225-050-1415ND
2019-04-221225-073-1600ND
2019-04-221225-072-1640ND
2019-04-221225-087-1630ND
2019-04-241225-052-1330ND
2019-04-241225-074-1450ND
2019-04-241225-006-1400ND
2019-04-241225-002-1430ND
2019-05-061225-082-1350ND
2019-07-241225-048-1420ND
2019-08-071225-026-1230ND
2019-08-081225-070-1530ND