Chromium (total)
Weston Municipal Utilities
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.
30
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.632 ppb | 15 | 15 | 0.340 ppb - 1.58 ppb |
| 2015 | 0.574 ppb | 10 | 10 | 0.305 ppb - 1.02 ppb |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | 0.438 ppb | 5 | 4 | ND - 0.700 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 | Lab ID | Result |
|---|---|---|
| 2014-03-25 | 776473 | 0.430 ppb |
| 2014-03-25 | 776480 | 0.440 ppb |
| 2014-03-25 | 776486 | 0.580 ppb |
| 2014-03-25 | 776476 | 1.10 ppb |
| 2014-03-25 | 776483 | 0.340 ppb |
| 2014-08-21 | 812589-12199 | 0.912 ppb |
| 2014-09-08 | 816384-12319 | 0.501 ppb |
| 2014-09-08 | 816386-12319 | 1.58 ppb |
| 2014-10-06 | 823507-12571 | 0.469 ppb |
| 2014-10-06 | 823515-12571 | 0.388 ppb |
| 2014-10-06 | 823511-12571 | 0.411 ppb |
| 2014-10-06 | 823513-12571 | 0.422 ppb |
| 2014-10-06 | 823517-12571 | 0.480 ppb |
| 2014-10-06 | 823505-12571 | 0.473 ppb |
| 2014-10-06 | 823509-12571 | 0.951 ppb |
| 2015-02-19 | 844543-13489 | 0.363 ppb |
| 2015-02-19 | 844547-13489 | 1.02 ppb |
| 2015-02-19 | 844539-13489 | 0.449 ppb |
| 2015-02-19 | 844555-13489 | 0.507 ppb |
| 2015-02-19 | 844551-13489 | 0.305 ppb |
| 2015-02-19 | 844557-13489 | 0.496 ppb |
| 2015-02-19 | 844549-13489 | 0.980 ppb |
| 2015-02-19 | 844545-13489 | 0.571 ppb |
| 2015-02-19 | 844541-13489 | 0.506 ppb |
| 2015-02-19 | 844553-13489 | 0.544 ppb |
| 2017-04-18 | 983866 | 0.500 ppb |
| 2017-04-18 | 983839 | 0.560 ppb |
| 2017-04-18 | 983875 | 0.700 ppb |
| 2017-04-18 | 983869 | 0.430 ppb |
| 2017-04-18 | 983872 | ND |