Chromium (total)
Rockville Centre
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.
55
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 |
|---|---|---|---|---|
| 2018 | ND | 10 | 0 | ND |
| 2019 | ND | 10 | 0 | ND |
| 2020 | ND | 10 | 0 | ND |
| 2021 | ND | 10 | 0 | ND |
| 2022 | ND | 10 | 0 | ND |
| 2023 | ND | 5 | 0 | ND |
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 |
|---|---|---|
| 2018-02-13 | 7042756002-PRI | ND |
| 2018-02-13 | 7042756005-PRI | ND |
| 2018-02-13 | 7042756001-PRI | ND |
| 2018-02-13 | 7042756003-PRI | ND |
| 2018-02-13 | 7042756004-PRI | ND |
| 2018-02-27 | 7044031001 | ND |
| 2018-02-27 | 7044031002 | ND |
| 2018-04-10 | 7047853001-PRI | ND |
| 2018-04-10 | 7047853002-PRI | ND |
| 2018-04-10 | 7047852003 | ND |
| 2019-02-08 | 7078927001-PRI | ND |
| 2019-02-08 | 7078927002-PRI | ND |
| 2019-02-08 | 7078927003-PRI | ND |
| 2019-03-05 | 7081342001-PRI | ND |
| 2019-03-05 | 7081342002-PRI | ND |
| 2019-03-14 | 7082427005-PRI | ND |
| 2019-03-14 | 7082427001-PRI | ND |
| 2019-03-14 | 7082427003-PRI | ND |
| 2019-03-14 | 7082427002-PRI | ND |
| 2019-03-14 | 7082427004-PRI | ND |
| 2020-02-27 | 70123244001-PRI | ND |
| 2020-02-27 | 70123244002-PRI | ND |
| 2020-03-05 | 70124121001-PRI | ND |
| 2020-03-05 | 70124121003-PRI | ND |
| 2020-03-05 | 70124121002-PRI | ND |
| 2020-03-31 | 70126618003-PRI | ND |
| 2020-03-31 | 70126618001-PRI | ND |
| 2020-03-31 | 70126618002-PRI | ND |
| 2020-03-31 | 70126618005-PRI | ND |
| 2020-03-31 | 70126618004-PRI | ND |
| 2021-02-08 | 70161813005-PRI | ND |
| 2021-02-08 | 70161813001-PRI | ND |
| 2021-02-08 | 70161813003-PRI | ND |
| 2021-02-08 | 70161813004-PRI | ND |
| 2021-02-08 | 70161813002-PRI | ND |
| 2021-02-10 | 70162095002-PRI | ND |
| 2021-02-10 | 70162095001-PRI | ND |
| 2021-02-10 | 70162095003-PRI | ND |
| 2021-02-10 | 70162095005-PRI | ND |
| 2021-02-10 | 70162095004-PRI | ND |
| 2022-02-11 | 70203943004 | ND |
| 2022-02-11 | 70203943005-PRI | ND |
| 2022-02-11 | 70203943003-PRI | ND |
| 2022-02-11 | 70203943002-PRI | ND |
| 2022-02-11 | 70203943001-PRI | ND |
| 2022-03-25 | 70208684001-PRI | ND |
| 2022-03-25 | 70208684002-PRI | ND |
| 2022-03-25 | 70208684004-PRI | ND |
| 2022-03-25 | 70208684003-PRI | ND |
| 2022-03-25 | 70208684005-PRI | ND |
| 2023-04-05 | 70259538001-PRI | ND |
| 2023-05-16 | 70256546001 | ND |
| 2023-06-13 | 70259538002 | ND |
| 2023-08-16 | 70267208002-PRI | ND |
| 2023-08-16 | 70267208001 | ND |