EWG's Tap Water Database — 2019 UPDATE



City of Lathrop

Vanadium is a metal used in steels and other alloys. People are commonly exposed to vanadium in water and food. Excessive exposure can be toxic during pregnancy and childhood.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
201213.4 ppb10106.00 ppb - 24.0 ppb
20136.44 ppb12120.420 ppb - 14.0 ppb
20144.32 ppb220.730 ppb - 7.90 ppb
201718.4 ppb5515.0 ppb - 26.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 21 ppb

The EWG Health Guideline of 21 ppb for vanadium was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against change in blood chemistry.

ppb = parts per billion

All test results

Date Lab ID Result
2012-06-205867-018-084014.0 ppb
2012-06-275867-018-083513.0 ppb
2012-07-035867-018-085513.0 ppb
2012-07-115867-018-090514.0 ppb
2012-07-185867-018-092515.0 ppb
2012-07-255867-018-083524.0 ppb
2012-08-015867-018-083514.0 ppb
2012-08-085867-018-085013.0 ppb
2012-08-155867-018-08206.00 ppb
2012-11-205867-016-09588.00 ppb
2013-04-17A3C1742-07A6.30 ppb
2013-04-17A3C1742-01A13.0 ppb
2013-04-17A3C1742-10A6.30 ppb
2013-04-17A3C1742-04A0.420 ppb
2013-04-17A3C1742-12A2.30 ppb
2013-07-30A3F1565-01A0.510 ppb
2013-07-30A3F1565-04A8.00 ppb
2013-10-15A3I1434-01A1.000 ppb
2013-10-15A3I1433-04A9.30 ppb
2013-10-15A3I1433-01A14.0 ppb
2013-10-16A3I1433-06A6.40 ppb
2013-10-16A3I1434-04A9.80 ppb
2014-01-21A3L1662-01A0.730 ppb
2014-01-22A3L1662-04A7.90 ppb
2017-04-039590-016-110515.0 ppb
2017-04-039590-008-113026.0 ppb
2017-04-039590-007-094720.0 ppb
2017-04-039590-006-103316.0 ppb
2017-04-039590-005-101215.0 ppb