Chromium (hexavalent)
Ridgewood Water
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).
56
Samples
0
Samples exceeding legal limit (MCL)
56
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.411 ppb | 51 | 51 | 0.140 ppb - 2.90 ppb |
| 2015 | 0.260 ppb | 5 | 5 | 0.210 ppb - 0.340 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 |
|---|---|---|
| 2014-06-25 | 201406260460AM | 0.350 ppb |
| 2014-06-25 | 201406260440AM | 0.550 ppb |
| 2014-06-25 | 201406260462AM | 0.220 ppb |
| 2014-06-25 | 201406260486AM | 0.310 ppb |
| 2014-06-25 | 201406260490AM | 0.180 ppb |
| 2014-06-25 | 201406260464AM | 0.210 ppb |
| 2014-06-25 | 201406260471AM | 0.310 ppb |
| 2014-06-25 | 201406260430AM | 0.360 ppb |
| 2014-06-25 | 201406260450AM | 0.330 ppb |
| 2014-06-25 | 201406260368AM | 0.220 ppb |
| 2014-06-25 | 201406260442AM | 0.170 ppb |
| 2014-06-25 | 201406260488AM | 0.440 ppb |
| 2014-06-25 | 201406260482AM | 0.520 ppb |
| 2014-06-25 | 201406260438AM | 0.360 ppb |
| 2014-06-25 | 201406260484AM | 0.330 ppb |
| 2014-06-30 | 201407010140AM | 0.150 ppb |
| 2014-06-30 | 201407010155AM | 0.250 ppb |
| 2014-06-30 | 201407010192AM | 0.160 ppb |
| 2014-06-30 | 201407010210AM | 0.720 ppb |
| 2014-06-30 | 201407010212AM | 0.300 ppb |
| 2014-06-30 | 201407010200AM | 2.90 ppb |
| 2014-06-30 | 201407010202AM | 0.220 ppb |
| 2014-06-30 | 201407010208AM | 0.350 ppb |
| 2014-06-30 | 201407010206AM | 0.300 ppb |
| 2014-06-30 | 201407010185AM | 0.340 ppb |
| 2014-08-06 | 201408070379AM | 0.260 ppb |
| 2014-08-06 | 201408070359AM | 0.200 ppb |
| 2014-08-06 | 201408070441AM | 0.250 ppb |
| 2014-12-15 | 201412160614AM | 0.210 ppb |
| 2014-12-15 | 201412160731AM | 0.170 ppb |
| 2014-12-15 | 201412160634AM | 0.330 ppb |
| 2014-12-15 | 201412160712AM | 0.310 ppb |
| 2014-12-15 | 201412160710AM | 0.380 ppb |
| 2014-12-15 | 201412160312AM | 0.260 ppb |
| 2014-12-15 | 201412160626AM | 0.420 ppb |
| 2014-12-15 | 201412160703AM | 0.350 ppb |
| 2014-12-15 | 201412160366AM | 0.200 ppb |
| 2014-12-17 | 201412180398AM | 0.300 ppb |
| 2014-12-17 | 201412180307AM | 0.480 ppb |
| 2014-12-17 | 201412180364AM | 0.300 ppb |
| 2014-12-17 | 201412180335AM | 0.140 ppb |
| 2014-12-17 | 201412180314AM | 0.250 ppb |
| 2014-12-17 | 201412180416AM | 2.80 ppb |
| 2014-12-17 | 201412180430AM | 0.540 ppb |
| 2014-12-28 | 201412300450AM | 0.200 ppb |
| 2014-12-29 | 201412300394AM | 0.180 ppb |
| 2014-12-29 | 201412300485AM | 0.610 ppb |
| 2014-12-29 | 201412300448AM | 0.340 ppb |
| 2014-12-29 | 201412300488AM | 0.310 ppb |
| 2014-12-29 | 201412300480AM | 0.340 ppb |
| 2014-12-29 | 201412300468AM | 0.280 ppb |
| 2015-06-04 | 201506050201AM | 0.320 ppb |
| 2015-06-04 | 201506050379AM | 0.210 ppb |
| 2015-06-04 | 201506050442AM | 0.340 ppb |
| 2015-06-04 | 201506050454AM | 0.220 ppb |
| 2015-09-23 | 201509240493AM | 0.210 ppb |