Know Your Environment. Protect Your Health.

Chromium (total)

Gulf County Water Department (lighthouse)

NOTE: Gulf County Water Department (lighthouse) purchases water from City of Port St. Joe which is required to test for chromium (total). Sample information shown below was taken by City of Port St. Joe.

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
2023ND20ND

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

NOTE: Gulf County Water Department (lighthouse) purchases water from City of Port St. Joe which is required to test for chromium (total). Sample information shown below was taken by City of Port St. Joe.

Date Result
2018-04-23ND
2019-04-16ND
2020-05-12ND
2021-05-18ND
2022-10-12ND
2023-05-04ND