Chromium (total)
New Iberia Water System (lAWCO)
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 | ND | 14 | 0 | ND |
| 2019 | 9.60 ppb | 2 | 2 | 9.60 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 4.63 ppb | 7 | 5 | ND - 7.00 ppb |
| 2022 | ND | 1 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2018-06-26 | AE22011 | ND |
| 2018-06-26 | AE22008 | ND |
| 2018-06-26 | AE22008 | ND |
| 2018-06-26 | AE22011 | ND |
| 2018-10-02 | B1804758-001 | ND |
| 2018-10-02 | B1804758-005 | ND |
| 2018-10-02 | B1804758-004 | ND |
| 2018-10-02 | B1804758-003 | ND |
| 2018-10-02 | B1804758-002 | ND |
| 2018-10-02 | B1804758-001 | ND |
| 2018-10-02 | B1804758-005 | ND |
| 2018-10-02 | B1804758-004 | ND |
| 2018-10-02 | B1804758-003 | ND |
| 2018-10-02 | B1804758-002 | ND |
| 2019-01-28 | B1900362-001 | 9.60 ppb |
| 2019-01-28 | B1900362-001 | 9.60 ppb |
| 2021-05-03 | B2102116-001 | ND |
| 2021-07-20 | B2103287-001 | 6.50 ppb |
| 2021-07-20 | B2103287-002 | 6.60 ppb |
| 2021-07-20 | B2103287-003 | 5.50 ppb |
| 2021-07-20 | B2103287-004 | 6.80 ppb |
| 2021-07-20 | B2103287-005 | 7.00 ppb |
| 2021-10-19 | B2105504-001 | ND |
| 2022-02-15 | B2200644-001 | ND |