Chromium (total)
Beverly Hills / Rolling Oaks Subdivision
Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.442 ppb | 22 | 14 | ND - 2.00 ppb |
2015 | 0.522 ppb | 13 | 13 | 0.220 ppb - 0.670 ppb |
2016 | N/A | 0 | 0 | N/A |
2017 | 0.567 ppb | 9 | 9 | 0.200 ppb - 1.90 ppb |
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
EPA Maximum Contaminant
Level (MCL) 100 ppb
The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.
ppb = parts per billion
All test results
Date | Result |
---|---|
2014-06-18 | 1.40 ppb |
2014-06-18 | 2.00 ppb |
2014-06-18 | ND |
2014-06-18 | ND |
2014-06-18 | ND |
2014-06-18 | ND |
2014-06-19 | ND |
2014-06-30 | 0.460 ppb |
2014-07-10 | ND |
2014-07-10 | ND |
2014-08-14 | 0.540 ppb |
2014-08-14 | 0.600 ppb |
2014-08-14 | 0.540 ppb |
2014-08-14 | 0.720 ppb |
2014-08-14 | 0.230 ppb |
2014-08-14 | ND |
2014-08-14 | 0.620 ppb |
2014-08-14 | 0.570 ppb |
2014-08-14 | 0.390 ppb |
2014-08-14 | 0.560 ppb |
2014-08-14 | 0.600 ppb |
2014-08-14 | 0.490 ppb |
2015-01-14 | 0.390 ppb |
2015-01-14 | 0.480 ppb |
2015-01-14 | 0.610 ppb |
2015-01-14 | 0.620 ppb |
2015-01-14 | 0.550 ppb |
2015-01-14 | 0.670 ppb |
2015-01-14 | 0.310 ppb |
2015-01-14 | 0.580 ppb |
2015-01-14 | 0.220 ppb |
2015-01-14 | 0.430 ppb |
2015-01-14 | 0.640 ppb |
2015-01-14 | 0.640 ppb |
2015-01-14 | 0.650 ppb |
2017-05-30 | 1.90 ppb |
2017-05-30 | 0.200 ppb |
2017-05-30 | 0.500 ppb |
2017-05-30 | 0.500 ppb |
2017-05-30 | 0.300 ppb |
2017-05-30 | 0.400 ppb |
2017-05-30 | 0.500 ppb |
2017-05-30 | 0.300 ppb |
2017-05-30 | 0.500 ppb |