Know Your Environment. Protect Your Health.

Chromium (total)

Gowc East Water System

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022ND30ND
20232.01 ppb175ND - 11.0 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
2022-10-24B2205111-002ND
2022-10-24B2205111-003ND
2022-10-24B2205111-001ND
2023-01-23B2300294-0036.10 ppb
2023-01-23B2300294-0025.10 ppb
2023-01-23B2300294-001ND
2023-03-24B2301445-0015.70 ppb
2023-03-24B2301445-002ND
2023-04-04B2301549-001ND
2023-04-04B2301549-002ND
2023-04-04B2301549-0036.20 ppb
2023-05-08B2301928-001ND
2023-05-08B2301928-002ND
2023-07-10B2302777-002ND
2023-07-10B2302777-00311.0 ppb
2023-07-10B2302777-004ND
2023-07-10B2302777-005ND
2023-07-10B2302777-001ND
2023-10-16B2304490-003ND
2023-10-16B2304490-001ND