Chromium (total)
City of Lexington
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.366 ppb | 40 | 33 | ND - 0.691 ppb |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-05-05 | 4E06007-04 | 0.357 ppb |
2014-05-05 | 4E06007-10 | 0.379 ppb |
2014-05-05 | 4E06007-07 | 0.351 ppb |
2014-05-05 | 4E06007-01 | 0.301 ppb |
2014-05-05 | 4E06007-18 | 0.445 ppb |
2014-05-05 | 4E06007-16 | 0.276 ppb |
2014-05-06 | 4E07020-34A | 0.528 ppb |
2014-05-06 | 4E07020-48A | 0.691 ppb |
2014-05-06 | 4E07020-40A | ND |
2014-05-06 | 4E07020-50A | 0.552 ppb |
2014-05-06 | 4E07020-36A | 0.400 ppb |
2014-05-06 | 4E07020-04A | 0.397 ppb |
2014-05-06 | 4E07020-13A | 0.512 ppb |
2014-05-06 | 4E07020-01A | 0.558 ppb |
2014-08-18 | 4H19024-07 | ND |
2014-09-15 | 4I17002-11 | 0.559 ppb |
2014-09-15 | 4I17002-09 | 0.402 ppb |
2014-09-15 | 4I17002-05 | 0.535 ppb |
2014-09-15 | 4I17002-03 | 0.379 ppb |
2014-09-15 | 4I17002-01 | 0.276 ppb |
2014-09-15 | 4I17002-13 | 0.292 ppb |
2014-09-15 | 4I17002-07 | 0.451 ppb |
2014-10-06 | 4J07088-42 | 0.683 ppb |
2014-10-06 | 4J07088-38 | 0.473 ppb |
2014-10-06 | 4J07088-36 | 0.347 ppb |
2014-10-06 | 4J07088-30 | 0.607 ppb |
2014-10-06 | 4J07088-32 | ND |
2014-10-06 | 4J07088-28 | 0.399 ppb |
2014-10-06 | 4J07088-34 | 0.615 ppb |
2014-10-06 | 4J07088-13 | ND |
2014-10-06 | 4J07088-10 | 0.348 ppb |
2014-10-06 | 4J07088-16 | 0.265 ppb |
2014-10-06 | 4J07088-25 | 0.450 ppb |
2014-10-06 | 4J07088-19 | ND |
2014-10-06 | 4J07088-01 | 0.549 ppb |
2014-10-06 | 4J07088-07 | 0.412 ppb |
2014-10-06 | 4J07088-04 | 0.326 ppb |
2014-10-06 | 4J07088-22 | ND |
2014-11-18 | 4K19018-01 | ND |
2014-11-18 | 4K19018-03 | 0.511 ppb |