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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

City of Post Falls

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).

 

12

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.221 ppb12120.124 ppb - 0.267 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2014-05-12WA97-SE2-14-08790.224 ppb
2014-05-12WA97-SE2-14-08790.258 ppb
2014-05-13WA97-SE2-14-08790.231 ppb
2014-05-13WA97-SE2-14-08790.242 ppb
2014-05-13WA97-SE2-14-08790.243 ppb
2014-05-13WA97-SE2-14-08790.224 ppb
2014-05-13WA97-SE2-14-08790.267 ppb
2014-05-13WA97-SE2-14-08790.124 ppb
2014-05-13WA97-SE2-14-08790.237 ppb
2014-05-13WA97-SE2-14-08790.245 ppb
2014-05-13WA97-SE2-14-08790.223 ppb
2014-05-13WA97-SE2-14-08790.129 ppb