Chromium (total)
Leeds Water Board
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.
44
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 |
|---|---|---|---|---|
| 2013 | 0.591 ppb | 28 | 28 | 0.280 ppb - 1.000 ppb |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 7 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 7 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2013-04-08 | 3589226021AM | 0.940 ppb |
| 2013-04-08 | 3589226001AM | 0.700 ppb |
| 2013-04-08 | 3589226005AM | 0.610 ppb |
| 2013-04-08 | 3589226017AM | 0.530 ppb |
| 2013-04-08 | 3589226027AM | 0.460 ppb |
| 2013-04-08 | 3589226025AM | 0.280 ppb |
| 2013-04-08 | 3589226003AM | 0.510 ppb |
| 2013-04-08 | 3589226023AM | 0.500 ppb |
| 2013-04-08 | 3589226015AM | 0.550 ppb |
| 2013-04-08 | 3589226009AM | 0.490 ppb |
| 2013-04-08 | 3589226019AM | 0.510 ppb |
| 2013-04-08 | 3589226007AM | 0.560 ppb |
| 2013-06-26 | 3598356003AM | 0.510 ppb |
| 2013-06-26 | 3598356001AM | 0.520 ppb |
| 2013-10-08 | 35111443011AM | 0.590 ppb |
| 2013-10-08 | 35111443009AM | 0.480 ppb |
| 2013-10-08 | 35111443001AM | 0.710 ppb |
| 2013-10-08 | 35111443021AM | 0.680 ppb |
| 2013-10-08 | 35111443023AM | 0.670 ppb |
| 2013-10-08 | 35111443007AM | 0.650 ppb |
| 2013-10-08 | 35111443019AM | 0.580 ppb |
| 2013-10-08 | 35111443027AM | 0.570 ppb |
| 2013-10-08 | 35111443015AM | 0.630 ppb |
| 2013-10-08 | 35111443025AM | 0.300 ppb |
| 2013-10-08 | 35111443013AM | 0.630 ppb |
| 2013-10-08 | 35111443005AM | 0.790 ppb |
| 2013-12-04 | 35118366001AM | 0.590 ppb |
| 2013-12-04 | 35118366003AM | 1.000 ppb |
| 2015-07-20 | 1507-00297-1 | ND |
| 2015-07-20 | 1507-00297-2 | ND |
| 2015-07-20 | 1507-00297-3 | ND |
| 2015-07-20 | 1507-00297-5 | ND |
| 2015-07-20 | 1507-00297-6 | ND |
| 2015-07-20 | 1507-00297-4 | ND |
| 2015-08-17 | 1508-00190-1 | ND |
| 2017-10-04 | 1710-00071-1 | ND |
| 2018-07-16 | 1807-00242-005 | ND |
| 2018-07-16 | 1807-00242-003 | ND |
| 2018-07-16 | 1807-00242-002 | ND |
| 2018-07-16 | 1807-00242-006 | ND |
| 2018-07-16 | 1807-00242-007 | ND |
| 2018-07-16 | 1807-00242-004 | ND |
| 2018-07-16 | 1807-00242-001 | ND |
| 2019-07-31 | 1907-00423-001 | ND |