Know Your Environment. Protect Your Health.

Chromium (hexavalent)

Nocona Hills Water Supply Corporation

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

 

10

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20150.0441 ppb107ND - 0.106 ppb
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2015-03-11112596PND
2015-03-11112597PND
2015-03-11312682PND
2015-03-11112599P0.0350 ppb
2015-03-11112598P0.0460 ppb
2015-09-15115455P0.0388 ppb
2015-09-15115456P0.0559 ppb
2015-09-15115454P0.0568 ppb
2015-09-15115453P0.102 ppb
2015-09-15315538P0.106 ppb