Chromium (hexavalent)
California Water Service Company - East Los Angeles
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)
47
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.672 ppb | 38 | 29 | ND - 2.40 ppb |
| 2015 | 0.662 ppb | 11 | 11 | 0.140 ppb - 1.70 ppb |
| 2016 | 1.60 ppb | 2 | 2 | 1.60 ppb |
| 2017 | 1.60 ppb | 1 | 1 | 1.60 ppb |
| 2018 | 1.80 ppb | 2 | 2 | 1.70 ppb - 1.90 ppb |
| 2019 | 1.85 ppb | 2 | 2 | 1.80 ppb - 1.90 ppb |
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 |
|---|---|---|
| 2014-01-02 | 9590-025-0858 | 1.50 ppb |
| 2014-02-11 | 201402110484AM | 0.120 ppb |
| 2014-02-11 | 201402110639AM | 0.0480 ppb |
| 2014-02-11 | 201402110634AM | 0.690 ppb |
| 2014-02-11 | 201402110508AM | 1.10 ppb |
| 2014-02-11 | 201402110500AM | ND |
| 2014-02-18 | 201402180315AM | 1.60 ppb |
| 2014-02-18 | 201402180281AM | 0.0440 ppb |
| 2014-02-18 | 201402190138AM | 0.990 ppb |
| 2014-02-18 | 201402180275AM | 0.120 ppb |
| 2014-02-18 | 201402180269AM | 0.0380 ppb |
| 2014-03-10 | 201403100286AM | ND |
| 2014-05-05 | 201405050253AM | 0.0560 ppb |
| 2014-05-05 | 201405050300AM | 0.0560 ppb |
| 2014-05-12 | 201405120236AM | 2.30 ppb |
| 2014-07-15 | 9590-025-1500 | 1.70 ppb |
| 2014-07-16 | 9590-012-1400 | ND |
| 2014-07-16 | 9590-055-1320 | ND |
| 2014-07-16 | 9590-034-1445 | 2.40 ppb |
| 2014-07-16 | 9590-023-1423 | ND |
| 2014-07-16 | 9590-011-1330 | 1.40 ppb |
| 2014-07-16 | 9590-006-1455 | ND |
| 2014-07-21 | 9590-004-1215 | 2.10 ppb |
| 2014-08-04 | 201408040388AM | 1.90 ppb |
| 2014-08-04 | 201408040380AM | 0.740 ppb |
| 2014-08-04 | 201408040393AM | 0.0430 ppb |
| 2014-08-04 | 201408040360AM | 1.70 ppb |
| 2014-08-04 | 201408040417AM | 1.000 ppb |
| 2014-08-04 | 201408040369AM | 1.60 ppb |
| 2014-08-04 | 201408040408AM | 0.120 ppb |
| 2014-08-06 | 201408060729AM | 0.0450 ppb |
| 2014-08-06 | 201408060799AM | ND |
| 2014-08-06 | 201408060808AM | 0.0480 ppb |
| 2014-08-06 | 201408060724AM | ND |
| 2014-08-06 | 201408060792AM | ND |
| 2014-11-03 | 201411030367AM | 0.0320 ppb |
| 2014-11-03 | 201411030327AM | 0.0410 ppb |
| 2014-11-03 | 201411030298AM | 2.00 ppb |
| 2015-01-12 | 9590-025-1145 | 1.60 ppb |
| 2015-02-09 | 201502090462AM | 0.200 ppb |
| 2015-02-09 | 201502090455AM | 0.140 ppb |
| 2015-02-09 | 201502090125AM | 1.70 ppb |
| 2015-02-09 | 201502090298AM | 0.590 ppb |
| 2015-02-10 | 201502100666AM | 0.200 ppb |
| 2015-07-13 | 9590-025-1042 | 1.60 ppb |
| 2015-08-10 | 201508100292AM | 0.210 ppb |
| 2015-08-10 | 201508100286AM | 0.140 ppb |
| 2015-08-17 | 201508170412AM | 0.620 ppb |
| 2015-08-17 | 201508170247AM | 0.280 ppb |
| 2016-01-04 | 9590-025-1254 | 1.60 ppb |
| 2016-07-05 | 9590-025-1408 | 1.60 ppb |
| 2017-07-03 | 9590-025-1306 | 1.60 ppb |
| 2018-01-08 | 9590-025-1220 | 1.70 ppb |
| 2018-08-13 | 9590-025-1040 | 1.90 ppb |
| 2019-01-14 | 9590-025-1309 | 1.80 ppb |
| 2019-07-22 | 9590-025-1133 | 1.90 ppb |