Chromium (hexavalent)
Town of Hempstead Water Department
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).
36
Samples
0
Samples exceeding legal limit (MCL)
36
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.288 ppb | 35 | 35 | 0.0780 ppb - 1.10 ppb |
| 2015 | 0.310 ppb | 1 | 1 | 0.310 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 |
|---|---|---|
| 2014-06-09 | 35141680007AM | 0.0780 ppb |
| 2014-06-09 | 35141680009AM | 0.510 ppb |
| 2014-06-10 | 35141680005AM | 0.250 ppb |
| 2014-06-10 | 35141680003AM | 0.460 ppb |
| 2014-06-10 | 35141680001AM | 0.130 ppb |
| 2014-06-10 | 35141680011AM | 0.550 ppb |
| 2014-06-11 | 35141731005AM | 0.200 ppb |
| 2014-06-11 | 35141731001AM | 0.180 ppb |
| 2014-06-11 | 35141731003AM | 0.160 ppb |
| 2014-06-12 | 35141988007AM | 0.250 ppb |
| 2014-06-12 | 35141988005AM | 0.300 ppb |
| 2014-06-12 | 35141988003AM | 0.230 ppb |
| 2014-06-12 | 35141988011AM | 0.450 ppb |
| 2014-06-12 | 35141988009AM | 0.110 ppb |
| 2014-06-12 | 35141988001AM | 0.170 ppb |
| 2014-06-18 | 35142693001AM | 0.0780 ppb |
| 2014-06-30 | 35144083003AM | 1.10 ppb |
| 2014-06-30 | 35144083001AM | 0.210 ppb |
| 2014-12-08 | 35167373005AM | 0.440 ppb |
| 2014-12-08 | 35167373001AM | 0.400 ppb |
| 2014-12-08 | 35167373003AM | 0.180 ppb |
| 2014-12-09 | 35167822007AM | 0.410 ppb |
| 2014-12-09 | 35167822001AM | 0.130 ppb |
| 2014-12-09 | 35167822003AM | 0.260 ppb |
| 2014-12-09 | 35167822005AM | 0.520 ppb |
| 2014-12-10 | 35167821001AM | 0.150 ppb |
| 2014-12-10 | 35167821005AM | 0.160 ppb |
| 2014-12-10 | 35167821003AM | 0.210 ppb |
| 2014-12-11 | 35168101001AM | 0.170 ppb |
| 2014-12-11 | 35168101007AM | 0.250 ppb |
| 2014-12-11 | 35168101009AM | 0.340 ppb |
| 2014-12-11 | 35168101003AM | 0.180 ppb |
| 2014-12-11 | 35168101005AM | 0.110 ppb |
| 2014-12-22 | 35169266003AM | 0.490 ppb |
| 2014-12-22 | 35169266001AM | 0.280 ppb |
| 2015-08-11 | 35202431001AM | 0.310 ppb |