Chromium (hexavalent)
Southwood Water System
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).
41
Samples
0
Samples exceeding legal limit (MCL)
33
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.101 ppb | 21 | 18 | ND - 0.230 ppb |
| 2015 | 0.0938 ppb | 20 | 15 | ND - 0.210 ppb |
| 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 |
|---|---|---|
| 2014-08-11 | 201408120234AM | ND |
| 2014-08-11 | 201408120226AM | 0.230 ppb |
| 2014-08-11 | 201408120297AM | 0.230 ppb |
| 2014-08-11 | 201408120484AM | 0.230 ppb |
| 2014-08-11 | 201408120563AM | ND |
| 2014-08-11 | 201408120479AM | 0.190 ppb |
| 2014-08-12 | 201408130887AM | 0.110 ppb |
| 2014-08-12 | 201408130218AM | 0.0620 ppb |
| 2014-08-12 | 201408130244AM | 0.230 ppb |
| 2014-08-12 | 201408130903AM | 0.110 ppb |
| 2014-08-12 | 201408130715AM | ND |
| 2014-08-12 | 201408130697AM | 0.0640 ppb |
| 2014-08-13 | 201408140359AM | 0.0610 ppb |
| 2014-08-13 | 201408140340AM | 0.0720 ppb |
| 2014-08-13 | 201408140377AM | 0.0680 ppb |
| 2014-08-13 | 201408140545AM | 0.0410 ppb |
| 2014-08-13 | 201408140382AM | 0.0710 ppb |
| 2014-08-20 | 201408210317AM | 0.0390 ppb |
| 2014-08-20 | 201408210235AM | 0.110 ppb |
| 2014-11-01 | 201411040290AM | 0.1000 ppb |
| 2014-11-03 | 201411040264AM | 0.110 ppb |
| 2015-02-12 | 201502130334AM | 0.200 ppb |
| 2015-02-12 | 201502130422AM | 0.200 ppb |
| 2015-02-16 | 201502170124AM | 0.180 ppb |
| 2015-02-16 | 201502170108AM | 0.0750 ppb |
| 2015-02-16 | 201502170128AM | 0.0650 ppb |
| 2015-02-16 | 201502170142AM | 0.210 ppb |
| 2015-02-16 | 201502170146AM | 0.210 ppb |
| 2015-02-16 | 201502170153AM | 0.110 ppb |
| 2015-02-23 | 201502240369AM | 0.0520 ppb |
| 2015-02-23 | 201502240365AM | 0.0540 ppb |
| 2015-02-23 | 201502240388AM | ND |
| 2015-02-23 | 201502240590AM | ND |
| 2015-02-23 | 201502240367AM | 0.110 ppb |
| 2015-02-23 | 201502240371AM | 0.120 ppb |
| 2015-02-25 | 201502260449AM | 0.120 ppb |
| 2015-02-25 | 201502260184AM | 0.1000 ppb |
| 2015-03-16 | 201503170800AM | ND |
| 2015-03-16 | 201503170480AM | ND |
| 2015-03-16 | 201503170493AM | ND |
| 2015-03-16 | 201503170671AM | 0.0690 ppb |