EWG's Tap Water Database — 2021 UPDATE



San Gabriel Valley Water Company-Montebello

Molybdenum is a metal that occurs naturally in soil, minerals and water. People who ingest large amounts can have increased levels of uric acid and gout-like symptoms.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20144.74 ppb17171.000 ppb - 19.0 ppb
20153.21 ppb17171.20 ppb - 8.10 ppb
20162.10 ppb112.10 ppb
20171.90 ppb111.90 ppb
20182.20 ppb112.20 ppb
20191.70 ppb111.70 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 40 ppb

The EWG Health Guideline of 40 ppb for molybdenum was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against metabolic changes and excess formation of uric acid in the blood.

ppb = parts per billion

All test results

Date Lab ID Result