Chromium (total)
Dallas Water Utility
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.
42
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.643 ppb | 21 | 19 | ND - 3.76 ppb |
| 2015 | 0.493 ppb | 9 | 8 | ND - 0.860 ppb |
| 2016 | 0.653 ppb | 3 | 3 | 0.480 ppb - 0.770 ppb |
| 2017 | 0.433 ppb | 3 | 1 | ND - 1.30 ppb |
| 2018 | 0.333 ppb | 3 | 1 | ND - 1.000 ppb |
| 2019 | ND | 3 | 0 | ND |
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 |
|---|---|---|
| 2014-02-19 | Q1405420002 | 3.76 ppb |
| 2014-04-08 | Q1410915001 | ND |
| 2014-04-08 | Q1410915005 | 0.428 ppb |
| 2014-04-08 | Q1410915009 | 0.571 ppb |
| 2014-04-08 | Q1410915017 | ND |
| 2014-04-08 | Q1410915013 | 0.417 ppb |
| 2014-04-08 | Q1410915015 | 0.496 ppb |
| 2014-05-22 | Q1417683003 | 2.40 ppb |
| 2014-05-22 | Q1417683004 | 1.60 ppb |
| 2014-07-15 | Q1428070013 | 0.327 ppb |
| 2014-07-15 | Q1428070017 | 0.252 ppb |
| 2014-07-15 | Q1428070015 | 0.251 ppb |
| 2014-07-15 | Q1428070001 | 0.249 ppb |
| 2014-07-15 | Q1428070009 | 0.462 ppb |
| 2014-07-15 | Q1428070005 | 0.328 ppb |
| 2014-10-21 | Q1453299015 | 0.402 ppb |
| 2014-10-21 | Q1453299017 | 0.269 ppb |
| 2014-10-21 | Q1453299013 | 0.350 ppb |
| 2014-10-21 | Q1453299001 | 0.234 ppb |
| 2014-10-21 | Q1453299009 | 0.405 ppb |
| 2014-10-21 | Q1453299005 | 0.306 ppb |
| 2015-01-13 | Q1500512017 | 0.218 ppb |
| 2015-01-13 | Q1500512005 | 0.472 ppb |
| 2015-01-13 | Q1500512013 | 0.455 ppb |
| 2015-01-13 | Q1500512015 | 0.372 ppb |
| 2015-01-13 | Q1500512001 | ND |
| 2015-01-13 | Q1500512009 | 0.463 ppb |
| 2015-01-15 | Q1501302002 | 0.780 ppb |
| 2015-03-11 | Q1509063004 | 0.820 ppb |
| 2015-04-20 | Q1514656003 | 0.860 ppb |
| 2016-01-12 | Q1601371002 | 0.710 ppb |
| 2016-02-11 | Q1606396002 | 0.480 ppb |
| 2016-09-14 | Q1637473006 | 0.770 ppb |
| 2017-01-03 | Q1700179010 | 1.30 ppb |
| 2017-01-24 | Q1703294003 | ND |
| 2017-08-23 | Q1737870005 | ND |
| 2018-01-04 | Q1800411020 | ND |
| 2018-08-07 | Q1831263008 | ND |
| 2018-08-07 | Q1831263007 | 1.000 ppb |
| 2019-01-08 | Q1900829001 | ND |
| 2019-07-16 | Q1945074011 | ND |
| 2019-07-16 | Q1945074010 | ND |