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EWG's Tap Water Database — 2019 UPDATE

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Molybdenum

Washington Aqueduct Division

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.

 

143

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.558 ppb2416ND - 1.40 ppb
20130.371 ppb2411ND - 1.000 ppb
20140.479 ppb2416ND - 1.10 ppb
20150.638 ppb2423ND - 1.10 ppb
20160.771 ppb2421ND - 1.30 ppb
20170.674 ppb23230.400 ppb - 1.10 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
2012-01-01DalecarliaND
2012-01-01McMillanND
2012-02-01Dalecarlia0.600 ppb
2012-02-01McMillanND
2012-03-01DalecarliaND
2012-03-01McMillanND
2012-04-01DalecarliaND
2012-04-01McMillanND
2012-05-01Dalecarlia0.700 ppb
2012-05-01McMillan0.500 ppb
2012-06-01Dalecarlia0.700 ppb
2012-06-01McMillan0.500 ppb
2012-07-01Dalecarlia1.10 ppb
2012-07-01McMillan1.000 ppb
2012-08-01Dalecarlia1.40 ppb
2012-08-01McMillan1.30 ppb
2012-09-01Dalecarlia1.10 ppb
2012-09-01McMillan1.10 ppb
2012-10-01Dalecarlia0.900 ppb
2012-10-01McMillan0.800 ppb
2012-11-01DalecarliaND
2012-11-01McMillan0.500 ppb
2012-12-01Dalecarlia0.600 ppb
2012-12-01McMillan0.600 ppb
2013-01-01DalecarliaND
2013-01-01McMillanND
2013-02-01DalecarliaND
2013-02-01McMillanND
2013-03-01DalecarliaND
2013-03-01McMillanND
2013-04-01DalecarliaND
2013-04-01McMillanND
2013-05-01DalecarliaND
2013-05-01McMillanND
2013-06-01Dalecarlia0.600 ppb
2013-06-01McMillanND
2013-07-01Dalecarlia0.800 ppb
2013-07-01McMillan0.700 ppb
2013-08-01Dalecarlia1.000 ppb
2013-08-01McMillan0.900 ppb
2013-09-01Dalecarlia0.900 ppb
2013-09-01McMillan0.900 ppb
2013-10-01Dalecarlia0.700 ppb
2013-10-01McMillan0.800 ppb
2013-11-01Dalecarlia0.800 ppb
2013-11-01McMillan0.800 ppb
2013-12-01DalecarliaND
2013-12-01McMillanND
2014-01-01DalecarliaND
2014-01-01McMillanND
2014-02-01DalecarliaND
2014-02-01McMillanND
2014-03-01DalecarliaND
2014-03-01McMillanND
2014-04-01DalecarliaND
2014-04-01McMillanND
2014-05-01Dalecarlia0.300 ppb
2014-05-01McMillan0.300 ppb
2014-06-01Dalecarlia0.500 ppb
2014-06-01McMillan0.500 ppb
2014-07-01Dalecarlia0.600 ppb
2014-07-01McMillan0.500 ppb
2014-08-01Dalecarlia0.900 ppb
2014-08-01McMillan0.800 ppb
2014-09-01Dalecarlia1.000 ppb
2014-09-01McMillan0.900 ppb
2014-10-01Dalecarlia1.000 ppb
2014-10-01McMillan1.10 ppb
2014-11-01Dalecarlia0.900 ppb
2014-11-01McMillan0.900 ppb
2014-12-01Dalecarlia0.600 ppb
2014-12-01McMillan0.700 ppb
2015-01-01Dalecarlia0.500 ppb
2015-01-01McMillan0.500 ppb
2015-02-01Dalecarlia0.600 ppb
2015-02-01McMillan0.500 ppb
2015-03-01Dalecarlia0.400 ppb
2015-03-01McMillan0.500 ppb
2015-04-01Dalecarlia0.400 ppb
2015-04-01McMillan0.300 ppb
2015-05-01Dalecarlia0.500 ppb
2015-05-01McMillan0.300 ppb
2015-06-01Dalecarlia0.700 ppb
2015-06-01McMillan0.600 ppb
2015-07-01DalecarliaND
2015-07-01McMillan0.600 ppb
2015-08-01Dalecarlia1.10 ppb
2015-08-01McMillan0.800 ppb
2015-09-01Dalecarlia1.10 ppb
2015-09-01McMillan1.10 ppb
2015-10-01Dalecarlia1.000 ppb
2015-10-01McMillan1.000 ppb
2015-11-01Dalecarlia0.700 ppb
2015-11-01McMillan0.800 ppb
2015-12-01Dalecarlia0.600 ppb
2015-12-01McMillan0.700 ppb
2016-01-01Dalecarlia0.700 ppb
2016-01-01McMillan0.400 ppb
2016-02-01Dalecarlia0.600 ppb
2016-02-01McMillan0.400 ppb
2016-03-01Dalecarlia1.000 ppb
2016-03-01McMillan0.700 ppb
2016-04-01Dalecarlia1.000 ppb
2016-04-01McMillan1.20 ppb
2016-05-01Dalecarlia1.30 ppb
2016-05-01McMillanND
2016-06-01DalecarliaND
2016-06-01McMillanND
2016-07-01Dalecarlia1.000 ppb
2016-07-01McMillan0.700 ppb
2016-08-01Dalecarlia0.800 ppb
2016-08-01McMillan0.900 ppb
2016-09-01Dalecarlia1.10 ppb
2016-09-01McMillan1.10 ppb
2016-10-01Dalecarlia1.10 ppb
2016-10-01McMillan1.000 ppb
2016-11-01Dalecarlia1.000 ppb
2016-11-01McMillan0.900 ppb
2016-12-01Dalecarlia0.800 ppb
2016-12-01McMillan0.800 ppb
2017-01-01Dalecarlia0.700 ppb
2017-01-01McMillan0.700 ppb
2017-02-01Dalecarlia0.400 ppb
2017-02-01McMillan0.700 ppb
2017-03-01Dalecarlia0.500 ppb
2017-03-01McMillan0.500 ppb
2017-04-01Dalecarlia0.400 ppb
2017-04-01McMillan0.400 ppb
2017-05-01Dalecarlia0.400 ppb
2017-05-01McMillan0.500 ppb
2017-06-01Dalecarlia0.400 ppb
2017-06-01McMillan0.400 ppb
2017-07-01Dalecarlia0.700 ppb
2017-07-01McMillan0.700 ppb
2017-08-01Dalecarlia0.700 ppb
2017-08-01McMillan0.800 ppb
2017-09-01Dalecarlia0.900 ppb
2017-09-01McMillan0.900 ppb
2017-10-01Dalecarlia1.10 ppb
2017-10-01McMillan1.000 ppb
2017-11-01Dalecarlia1.000 ppb
2017-11-01McMillan1.000 ppb
2017-12-01Dalecarlia0.700 ppb