Know Your Environment. Protect Your Health.

Chromium (total)

San Antonio Water Company

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
2018ND80ND
2019ND10ND
2020ND10ND
2021ND100ND
2022N/A00N/A
2023N/A00N/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
2018-07-20CA3610085_013_013-201807200900ND
2018-07-20CA3610085_004_004-201807201135ND
2018-07-20CA3610085_016_016-201807201030ND
2018-07-20CA3610085_017_017-201807200920ND
2018-07-20CA3610085_018_018-201807200946ND
2018-07-20CA3610085_002_002-201807200951ND
2018-07-20CA3610085_003_003-201807201156ND
2018-07-20CA3610085_001_001-201807201100ND
2019-01-04CA3610085_011_011-201901040953ND
2020-04-07CA3610085_021_021-202004071020ND
2021-07-20CA3610085_013_013-202107200954ND
2021-07-20CA3610085_017_017-202107200943ND
2021-07-20CA3610085_001_001-202107201036ND
2021-07-20CA3610085_018_018-202107201130ND
2021-07-20CA3610085_011_011-202107200842ND
2021-07-20CA3610085_003_003-202107201013ND
2021-07-20CA3610085_002_002-202107201124ND
2021-07-27CA3610085_021_021-202107271245ND
2021-07-27CA3610085_016_016-202107270810ND
2021-07-27CA3610085_004_004-202107270908ND