Chromium (hexavalent)
Glendora 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).
29
Samples
0
Samples exceeding legal limit (MCL)
19
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.189 ppb | 8 | 7 | ND - 0.560 ppb |
| 2015 | 0.254 ppb | 9 | 8 | ND - 0.570 ppb |
| 2016 | 0.775 ppb | 4 | 2 | ND - 1.80 ppb |
| 2017 | 0.400 ppb | 3 | 1 | ND - 1.20 ppb |
| 2018 | ND | 1 | 0 | ND |
| 2019 | 0.350 ppb | 4 | 1 | ND - 1.40 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 |
|---|---|---|
| 2014-08-26 | 4H26034-03A | 0.0830 ppb |
| 2014-08-26 | 4H26034-05A | 0.0330 ppb |
| 2014-08-26 | 4H26034-01A | 0.560 ppb |
| 2014-08-26 | 4H26034-07A | ND |
| 2014-08-26 | 4H26034-09A | 0.170 ppb |
| 2014-11-18 | 4K18098-05A | 0.280 ppb |
| 2014-11-18 | 4K18098-03A | 0.290 ppb |
| 2014-11-18 | 4K18098-01A | 0.0980 ppb |
| 2015-02-20 | 5B20035-05A | 0.160 ppb |
| 2015-02-20 | 5B20035-01A | 0.280 ppb |
| 2015-02-20 | 5B20035-03A | 0.130 ppb |
| 2015-02-20 | 5B20035-07A | 0.380 ppb |
| 2015-02-20 | 5B20035-09A | 0.250 ppb |
| 2015-05-26 | 5E26067-01A | 0.230 ppb |
| 2015-05-26 | 5E26067-05A | 0.290 ppb |
| 2015-05-26 | 5E26067-03A | 0.570 ppb |
| 2015-09-09 | 9588-010-1010 | ND |
| 2016-06-13 | 9588-020-0855 | ND |
| 2016-06-13 | 9588-015-0940 | ND |
| 2016-09-08 | 9588-009-1015 | 1.80 ppb |
| 2016-09-08 | 9588-002-1035 | 1.30 ppb |
| 2017-03-02 | 9588-008-0810 | 1.20 ppb |
| 2017-09-07 | 9588-007-0920 | ND |
| 2017-09-07 | 9588-006-0910 | ND |
| 2018-09-14 | 9588-010-1025 | ND |
| 2019-06-18 | 9588-020-0800 | ND |
| 2019-06-18 | 9588-015-0825 | ND |
| 2019-09-19 | 9588-009-0910 | 1.40 ppb |
| 2019-09-19 | 9588-002-0740 | ND |