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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Green Valley SUD

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.

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55

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0513 ppb469ND - 0.313 ppb
2014N/A00N/A
2015N/A00N/A
2016ND30ND
2017ND30ND
2018N/A00N/A
2019ND30ND

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
2013-01-221301548-027AND
2013-01-221301548-017AND
2013-01-221301548-023AND
2013-01-221301548-019AND
2013-01-221301548-021AND
2013-01-221301548-001AND
2013-01-221301548-005AND
2013-01-221301548-013AND
2013-01-221301548-011AND
2013-01-221301548-025AND
2013-01-221301548-029AND
2013-01-221301548-031AND
2013-01-221301548-015AND
2013-01-221301548-007AND
2013-01-221301548-003AND
2013-01-221301548-009AND
2013-04-251304897-003AND
2013-04-251304897-005A0.280 ppb
2013-04-251304897-001A0.230 ppb
2013-04-251304897-007AND
2013-04-251304897-013A0.260 ppb
2013-04-251304897-009A0.250 ppb
2013-04-251304897-015AND
2013-04-251304897-011AND
2013-07-16Q1303745007ND
2013-07-16Q13037450030.224 ppb
2013-07-16Q13037450150.294 ppb
2013-07-16Q1303745025ND
2013-07-16Q1303745019ND
2013-07-16Q1303745009ND
2013-07-16Q13037450270.313 ppb
2013-07-16Q1303745023ND
2013-07-16Q1303745011ND
2013-07-16Q1303745021ND
2013-07-16Q1303745013ND
2013-07-16Q1303745005ND
2013-07-16Q13037450170.283 ppb
2013-07-16Q13037450010.224 ppb
2013-07-25Q1304284001ND
2013-10-29Q1310017001ND
2013-10-29Q1310017009ND
2013-10-29Q1310017011ND
2013-10-29Q1310017013ND
2013-10-29Q1310017005ND
2013-10-29Q1310017003ND
2013-10-29Q1310017007ND
2016-01-20AD18839ND
2016-01-20AD18840ND
2016-04-06AD31994ND
2017-01-30AD67454ND
2017-01-30AD67453ND
2017-04-20AD80298ND
2019-02-05AE52831ND
2019-02-05AE52833ND
2019-02-05AE52832ND