Know Your Environment. Protect Your Health.

Chromium (total)

Ward II Water District

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.

 

52

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND260ND
2019ND40ND
2020ND20ND
2021ND140ND
2022ND10ND
2023ND50ND

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
2018-05-02AE21727ND
2018-05-02AE21703ND
2018-05-02AE21727ND
2018-05-02AE21703ND
2018-06-06AE21818ND
2018-06-06AE21815ND
2018-06-06AE21812ND
2018-06-06AE21809ND
2018-06-06AE21812ND
2018-06-06AE21815ND
2018-06-06AE21818ND
2018-06-06AE21821ND
2018-06-06AE21809ND
2018-06-06AE21821ND
2018-06-25AE21992ND
2018-06-25AE22000ND
2018-06-25AE21996ND
2018-06-25AE21992ND
2018-06-25AE21988ND
2018-06-25AE21984ND
2018-06-25AE21984ND
2018-06-25AE22000ND
2018-06-25AE21996ND
2018-06-25AE21988ND
2018-09-10B1804157-001ND
2018-09-10B1804157-001ND
2019-07-24B1903193-001ND
2019-07-2435485209001ND
2019-07-2435485209001ND
2019-07-24B1903193-001ND
2020-06-23B2003030-001ND
2020-06-23B2003030-002ND
2021-03-29B2101469-003ND
2021-03-29B2101469-002ND
2021-03-29B2101469-001ND
2021-06-14B2102705-002ND
2021-06-14B2102705-005ND
2021-06-14B2102705-004ND
2021-06-14B2102705-003ND
2021-06-14B2102705-001ND
2021-06-28B2103005-006ND
2021-06-28B2103005-005ND
2021-06-28B2103005-004ND
2021-06-28B2103003-003ND
2021-06-28B2103003-002ND
2021-06-28B2103003-001ND
2022-08-22B2203975-001ND
2023-05-08B2301971-001ND
2023-05-08B2301971-002ND
2023-05-08B2301971-003ND
2023-05-08B2301971-004ND
2023-05-08B2301971-005ND