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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Bethesda WSC

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

MORE ABOUT THIS CONTAMINANT

 

98

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.00930 ppb713ND - 0.230 ppb
2014N/A00N/A
2015N/A00N/A
20161.65 ppb1511ND - 3.80 ppb
20173.03 ppb331.50 ppb - 5.00 ppb
2018N/A00N/A
20190.800 ppb95ND - 1.60 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date Lab ID Result
2013-02-181302519-037AND
2013-02-181302519-007AND
2013-02-181302519-019AND
2013-02-181302519-003AND
2013-02-181302519-027AND
2013-02-181302519-009AND
2013-02-181302519-005AND
2013-02-181302519-021AND
2013-02-181302519-023AND
2013-02-181302519-011AND
2013-02-181302519-013AND
2013-02-181302519-039AND
2013-02-181302519-041AND
2013-02-181302519-029AND
2013-02-181302519-031AND
2013-02-181302519-043AND
2013-02-181302519-045AND
2013-02-181302519-051AND
2013-02-181302519-049AND
2013-02-181302519-047AND
2013-02-181302519-015AND
2013-02-181302519-033AND
2013-02-181302519-017AND
2013-02-181302519-035AND
2013-02-181302519-025AND
2013-02-181302519-001AND
2013-02-281302519-085AND
2013-02-281302519-073AND
2013-02-281302519-075AND
2013-02-281302519-087AND
2013-02-281302519-077A0.230 ppb
2013-02-281302519-081AND
2013-02-281302519-083AND
2013-02-281302519-079AND
2013-05-22Q1301418003ND
2013-05-22Q1301418001ND
2013-08-12Q1305399023ND
2013-08-12Q1305399019ND
2013-08-12Q1305399029ND
2013-08-12Q1305399027ND
2013-08-12Q1305399007ND
2013-08-12Q1305399031ND
2013-08-12Q1305399003ND
2013-08-12Q1305399051ND
2013-08-12Q1305399041ND
2013-08-12Q1305399043ND
2013-08-12Q1305399047ND
2013-08-12Q1305399037ND
2013-08-12Q1305399039ND
2013-08-12Q1305399033ND
2013-08-12Q1305399057ND
2013-08-13Q1305399059ND
2013-08-13Q13053990630.214 ppb
2013-08-13Q1305399045ND
2013-08-13Q1305399021ND
2013-08-13Q1305399035ND
2013-08-13Q1305399009ND
2013-08-13Q1305399015ND
2013-08-13Q1305399013ND
2013-08-13Q1305399011ND
2013-08-13Q1305399025ND
2013-08-13Q1305399053ND
2013-08-13Q1305399061ND
2013-08-13Q1305399049ND
2013-08-13Q1305399005ND
2013-08-13Q13053990650.216 ppb
2013-08-13Q1305399001ND
2013-08-13Q1305399017ND
2013-08-13Q1305399055ND
2013-11-14Q1313379003ND
2013-11-14Q1313379001ND
2016-02-17Q16071840073.10 ppb
2016-02-17Q16071840061.30 ppb
2016-03-21Q16113650022.00 ppb
2016-04-20Q16157210101.80 ppb
2016-04-20Q16157210091.000 ppb
2016-04-20Q16157210082.30 ppb
2016-10-20Q16447870151.50 ppb
2016-10-20Q16447870133.50 ppb
2016-10-20Q16447870183.40 ppb
2016-10-20Q16447870140.980 ppb
2016-10-20Q16447870193.80 ppb
2016-11-08Q1648213002ND
2016-11-08Q1648213042ND
2016-11-08Q1648213001ND
2016-11-08Q1648213003ND
2017-01-31Q17041220182.60 ppb
2017-01-31Q17041220175.00 ppb
2017-10-17Q17532930291.50 ppb
2019-01-15Q1901990010ND
2019-01-15Q1901990009ND
2019-01-15Q1901990008ND
2019-04-11Q1914886021ND
2019-04-11Q19148860201.60 ppb
2019-04-11Q19148860191.10 ppb
2019-04-11Q19148860181.60 ppb
2019-04-11Q19148860171.60 ppb
2019-10-07Q19717840011.30 ppb