Chromium (total)
Canada Woods Water Company
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 | 18.8 ppb | 8 | 8 | 1.30 ppb - 96.0 ppb |
| 2019 | 4.71 ppb | 8 | 7 | ND - 18.1 ppb |
| 2020 | 7.55 ppb | 4 | 3 | ND - 21.4 ppb |
| 2021 | 3.21 ppb | 7 | 5 | ND - 8.60 ppb |
| 2022 | 3.67 ppb | 11 | 9 | ND - 13.0 ppb |
| 2023 | 3.38 ppb | 6 | 4 | ND - 6.70 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 |
|---|---|---|
| 2018-04-06 | CA2702588_029_029-201804061010 | 2.00 ppb |
| 2018-04-06 | CA2702588_008_008-201804061110 | 96.0 ppb |
| 2018-04-06 | CA2702588_028_028-201804061050 | 4.00 ppb |
| 2018-07-10 | CA2702588_008_008-201807101450 | 29.3 ppb |
| 2018-07-10 | CA2702588_028_028-201807101410 | 11.4 ppb |
| 2018-10-11 | CA2702588_008_008-201810111138 | 5.38 ppb |
| 2018-12-20 | CA2702588_002_002-201812201110 | 1.30 ppb |
| 2018-12-20 | CA2702588_001_001-201812201104 | 1.40 ppb |
| 2019-01-29 | CA2702588_008_008-201901291244 | 18.1 ppb |
| 2019-03-28 | CA2702588_027_027-201903281216 | 3.10 ppb |
| 2019-04-18 | CA2702588_008_008-201904180857 | 5.70 ppb |
| 2019-07-16 | CA2702588_008_008-201907161042 | 3.80 ppb |
| 2019-08-19 | CA2702588_010_010-201908190845 | 2.40 ppb |
| 2019-08-27 | CA2702588_001_001-201908271122 | ND |
| 2019-08-27 | CA2702588_002_002-201908271134 | 1.000 ppb |
| 2019-10-24 | CA2702588_008_008-201910240957 | 3.60 ppb |
| 2020-01-14 | CA2702588_008_008-202001141132 | 21.4 ppb |
| 2020-04-09 | CA2702588_008_008-202004090938 | 2.60 ppb |
| 2020-08-27 | CA2702588_008_008-202008271038 | ND |
| 2020-10-08 | CA2702588_008_008-202010081026 | 6.20 ppb |
| 2021-01-12 | CA2702588_008_008-202101120959 | 3.40 ppb |
| 2021-04-08 | CA2702588_008_008-202104081136 | 2.20 ppb |
| 2021-06-24 | CA2702588_002_002-202106240740 | ND |
| 2021-06-24 | CA2702588_001_001-202106240735 | ND |
| 2021-10-26 | CA2702588_008_008-202110261036 | 4.30 ppb |
| 2021-12-20 | CA2702588_028_028-202112200900 | 8.60 ppb |
| 2021-12-20 | CA2702588_029_029-202112201015 | 4.00 ppb |
| 2022-02-03 | CA2702588_008_008-202202031100 | 13.0 ppb |
| 2022-05-26 | CA2702588_008_008-202205261125 | 2.60 ppb |
| 2022-07-26 | CA2702588_002_002-202207261000 | ND |
| 2022-07-26 | CA2702588_001_001-202207261000 | ND |
| 2022-08-25 | CA2702588_029_029-202208251020 | 3.30 ppb |
| 2022-08-25 | CA2702588_027_027-202208250940 | 1.70 ppb |
| 2022-08-25 | CA2702588_010_010-202208251000 | 2.10 ppb |
| 2022-08-25 | CA2702588_008_008-202208251045 | 4.40 ppb |
| 2022-08-25 | CA2702588_008_008-202208251045 | 3.60 ppb |
| 2022-08-25 | CA2702588_028_028-202208250920 | 2.30 ppb |
| 2022-11-15 | CA2702588_008_008-202211151340 | 7.40 ppb |
| 2023-01-31 | CA2702588_012_012-202301311045 | 2.60 ppb |
| 2023-02-14 | CA2702588_008_008-202302141425 | 6.50 ppb |
| 2023-05-30 | CA2702588_008_008-202305301320 | 4.50 ppb |
| 2023-07-20 | CA2702588_002_002-202307201320 | ND |
| 2023-07-20 | CA2702588_001_001-202307201320 | ND |
| 2023-11-16 | CA2702588_008_008-202311161155 | 6.70 ppb |