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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

City of Nampa

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).

 

34

Samples

0

Samples exceeding legal limit (MCL)

33

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20142.62 ppb3433ND - 6.16 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
2014-01-30WA97-SE1-14-02172.54 ppb
2014-01-30WA97-SE1-14-02172.34 ppb
2014-01-30WA97-SE1-14-02170.118 ppb
2014-01-30WA97-SE1-14-02172.28 ppb
2014-01-30WA97-SE1-14-02176.15 ppb
2014-01-30WA97-SE1-14-02171.94 ppb
2014-01-30WA97-SE1-14-02170.982 ppb
2014-01-30WA97-SE1-14-02174.07 ppb
2014-01-30WA97-SE1-14-02176.16 ppb
2014-01-30WA97-SE1-14-02172.18 ppb
2014-01-30WA97-SE1-14-02173.26 ppb
2014-01-30WA97-SE1-14-02170.170 ppb
2014-01-30WA97-SE1-14-02174.01 ppb
2014-01-30WA97-SE1-14-02174.44 ppb
2014-01-30WA97-SE1-14-02170.945 ppb
2014-01-30WA97-SE1-14-02170.461 ppb
2014-01-30WA97-SE1-14-02172.38 ppb
2014-07-21WA97-SE2-14-13954.00 ppb
2014-07-21WA97-SE2-14-13956.10 ppb
2014-07-21WA97-SE2-14-13952.49 ppb
2014-07-21WA97-SE2-14-13952.12 ppb
2014-07-21WA97-SE2-14-13954.11 ppb
2014-07-21WA97-SE2-14-13950.937 ppb
2014-07-21WA97-SE2-14-13950.378 ppb
2014-07-21WA97-SE2-14-13953.99 ppb
2014-07-21WA97-SE2-14-13952.33 ppb
2014-07-21WA97-SE2-14-13956.09 ppb
2014-07-21WA97-SE2-14-13952.64 ppb
2014-07-21WA97-SE2-14-13952.42 ppb
2014-07-21WA97-SE2-14-1395ND
2014-07-21WA97-SE2-14-13952.27 ppb
2014-07-21WA97-SE2-14-13951.23 ppb
2014-07-21WA97-SE2-14-13952.37 ppb
2014-07-22WA97-SE2-14-13951.02 ppb