Chromium (hexavalent)
Regional Water Authority
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)
35
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.237 ppb | 36 | 35 | ND - 0.860 ppb |
| 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 |
|---|---|---|
| 2014-01-21 | 35123679033AM | 0.210 ppb |
| 2014-01-21 | 35123679013AM | 0.780 ppb |
| 2014-01-21 | 35123679025AM | 0.0690 ppb |
| 2014-01-21 | 35123679023AM | ND |
| 2014-01-21 | 35123679011AM | 0.730 ppb |
| 2014-01-21 | 35123679029AM | 0.150 ppb |
| 2014-01-21 | 35123679016AM | 0.210 ppb |
| 2014-01-21 | 35123679039AM | 0.850 ppb |
| 2014-01-21 | 35123679037AM | 0.860 ppb |
| 2014-01-21 | 35123679017AM | 0.240 ppb |
| 2014-01-21 | 35123679035AM | 0.210 ppb |
| 2014-01-21 | 35123679027AM | 0.0360 ppb |
| 2014-01-21 | 35123679021AM | 0.170 ppb |
| 2014-01-21 | 35123679001AM | 0.310 ppb |
| 2014-01-21 | 35123679019AM | 0.170 ppb |
| 2014-01-21 | 35123679005AM | 0.0380 ppb |
| 2014-01-21 | 35123679007AM | 0.310 ppb |
| 2014-01-21 | 35123679009AM | 0.200 ppb |
| 2014-01-21 | 35123679031AM | 0.0340 ppb |
| 2014-01-21 | 35123679003AM | 0.200 ppb |
| 2014-04-28 | 35135837001AM | 0.0350 ppb |
| 2014-04-28 | 35135837011AM | 0.0590 ppb |
| 2014-04-28 | 35135837007AM | 0.410 ppb |
| 2014-04-28 | 35135837003AM | 0.0410 ppb |
| 2014-04-28 | 35135837009AM | 0.0460 ppb |
| 2014-04-28 | 35135837005AM | 0.250 ppb |
| 2014-04-29 | 35136068003AM | 0.210 ppb |
| 2014-05-06 | 35137310001AM | 0.340 ppb |
| 2014-10-21 | 2036262005 | 0.240 ppb |
| 2014-10-21 | 2036262002 | 0.200 ppb |
| 2014-10-21 | 2036262007 | 0.310 ppb |
| 2014-10-21 | 2036262001 | 0.0480 ppb |
| 2014-10-21 | 2036262006 | 0.320 ppb |
| 2014-10-21 | 2036262003 | 0.120 ppb |
| 2014-10-21 | 2036262004 | 0.0500 ppb |
| 2014-10-21 | 2036262008 | 0.0750 ppb |