Chromium (total)
Aqua Pa Hatboro
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 5.32 ppb | 5 | 5 | 4.10 ppb - 6.70 ppb |
| 2019 | 2.47 ppb | 6 | 4 | ND - 8.00 ppb |
| 2020 | 0.757 ppb | 6 | 3 | ND - 2.60 ppb |
| 2021 | 1.24 ppb | 5 | 4 | ND - 2.30 ppb |
| 2022 | 0.333 ppb | 6 | 1 | ND - 2.00 ppb |
| 2023 | 0.300 ppb | 6 | 1 | ND - 1.80 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-01-16 | AF73308 | 5.10 ppb |
| 2018-01-16 | AF73309 | 6.00 ppb |
| 2018-01-16 | AF73310 | 6.70 ppb |
| 2018-03-14 | AF77912 | 4.70 ppb |
| 2018-03-14 | AF77913 | 4.10 ppb |
| 2021-07-23 | 24827937.00 | 1.10 ppb |
| 2021-07-23 | 24827947.00 | 1.20 ppb |
| 2021-07-23 | 24827957.00 | ND |
| 2021-08-06 | 25022205.00 | 1.60 ppb |
| 2021-08-06 | 25022215.00 | 2.30 ppb |