Chromium (hexavalent)
City of Lawrence
Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).
40
Samples
0
Samples exceeding legal limit (MCL)
40
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 1.21 ppb | 12 | 12 | 0.0900 ppb - 2.30 ppb |
| 2014 | 1.11 ppb | 4 | 4 | 0.150 ppb - 2.10 ppb |
| 2015 | 1.19 ppb | 6 | 6 | 0.110 ppb - 2.60 ppb |
| 2016 | 0.150 ppb | 1 | 1 | 0.150 ppb |
| 2017 | 0.955 ppb | 2 | 2 | 0.210 ppb - 1.70 ppb |
| 2018 | 1.03 ppb | 8 | 8 | 0.1000 ppb - 2.10 ppb |
| 2019 | 1.20 ppb | 7 | 7 | 0.170 ppb - 2.70 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.02 ppb
The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2013-05-13 | 2824506 | 0.300 ppb |
| 2013-05-13 | 2824466 | 2.20 ppb |
| 2013-05-13 | 2824512 | 0.300 ppb |
| 2013-05-13 | 2824499 | 2.20 ppb |
| 2013-08-14 | 2877416 | 0.330 ppb |
| 2013-08-14 | 2877428 | 2.20 ppb |
| 2013-08-14 | 2877404 | 2.10 ppb |
| 2013-08-14 | 2877389 | 0.330 ppb |
| 2013-11-13 | 2930260 | 2.30 ppb |
| 2013-11-13 | 2930321 | 0.1000 ppb |
| 2013-11-13 | 2930327 | 0.0900 ppb |
| 2013-11-13 | 2930266 | 2.10 ppb |
| 2014-02-12 | 2972932 | 0.150 ppb |
| 2014-02-12 | 2972919 | 2.00 ppb |
| 2014-02-12 | 2972947 | 0.170 ppb |
| 2014-02-12 | 2973015 | 2.10 ppb |
| 2015-02-04 | FEB2015-GENCHEM | 0.130 ppb |
| 2015-02-04 | FEB-15-GENCHEM | 2.10 ppb |
| 2015-05-06 | MAY-15-GENCHEM | 2.10 ppb |
| 2015-05-06 | MAY2015-GENCHEM | 0.120 ppb |
| 2015-11-03 | NOV2015-GENCHEM | 0.110 ppb |
| 2015-11-03 | NOV-15-GENCHEM | 2.60 ppb |
| 2016-05-04 | MAY2016-GENCHEM | 0.150 ppb |
| 2017-05-09 | 2017-05-09-GEN | 0.210 ppb |
| 2017-11-21 | 2017-12-21-GEN | 1.70 ppb |
| 2018-02-14 | 2018-02-14-GEN-T | 1.70 ppb |
| 2018-02-14 | 2018-02-14-GEN | 0.120 ppb |
| 2018-05-10 | 2018-05-10-GEN-T | 2.00 ppb |
| 2018-05-10 | 2018-05-10-GEN-T | 0.150 ppb |
| 2018-08-15 | 2018-08-5GEN-TP2 | 1.90 ppb |
| 2018-08-15 | 2018-08-15-GEN-T | 0.1000 ppb |
| 2018-11-01 | 2018-11-01-GEN-T | 2.10 ppb |
| 2018-11-01 | 2018-11-01-GEN-T | 0.160 ppb |
| 2019-02-14 | 2019-02-14 GEN T | 2.70 ppb |
| 2019-02-14 | 2019-02-14 GEN T | 0.480 ppb |
| 2019-05-14 | 2019-05-14-GEN-T | 2.40 ppb |
| 2019-05-14 | 2019-05-14-GEN-T | 0.170 ppb |
| 2019-08-07 | 2019-08-07-GEN-T | 0.250 ppb |
| 2019-11-18 | 2019-11-18-GEN-T | 0.270 ppb |
| 2019-11-18 | 2019-11-18-GEN-T | 2.10 ppb |