Chromium (hexavalent)
City of Laramie
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).
26
Samples
0
Samples exceeding legal limit (MCL)
21
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.198 ppb | 26 | 21 | ND - 0.510 ppb |
| 2014 | N/A | 0 | 0 | N/A |
| 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
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 |
|---|---|---|
| 2013-02-19 | 201302200449AM | 0.360 ppb |
| 2013-02-19 | 201302200436AM | 0.0440 ppb |
| 2013-02-19 | 201302200419AM | ND |
| 2013-02-19 | 201302200553AM | ND |
| 2013-02-19 | 201302200336AM | 0.320 ppb |
| 2013-02-19 | 201302200476AM | 0.330 ppb |
| 2013-02-19 | 201302200513AM | 0.300 ppb |
| 2013-02-19 | 201302200586AM | 0.500 ppb |
| 2013-05-20 | 201305210041AM | ND |
| 2013-05-20 | 201305210045AM | ND |
| 2013-05-20 | 201305210028AM | 0.300 ppb |
| 2013-05-20 | 201305210047AM | 0.380 ppb |
| 2013-05-20 | 201305210020AM | ND |
| 2013-08-20 | 201308210397AM | 0.310 ppb |
| 2013-08-20 | 201308210430AM | 0.330 ppb |
| 2013-08-20 | 201308210641AM | 0.0390 ppb |
| 2013-08-20 | 201308210617AM | 0.0640 ppb |
| 2013-08-20 | 201308210596AM | 0.330 ppb |
| 2013-08-20 | 201308210404AM | 0.510 ppb |
| 2013-08-20 | 201308210588AM | 0.0450 ppb |
| 2013-09-09 | 201309100227AM | 0.200 ppb |
| 2013-11-19 | 201311200375AM | 0.0460 ppb |
| 2013-11-19 | 201311200422AM | 0.0500 ppb |
| 2013-11-19 | 201311200351AM | 0.320 ppb |
| 2013-11-19 | 201311200419AM | 0.320 ppb |
| 2013-11-19 | 201311200543AM | 0.0470 ppb |