EWG's Tap Water Database — 2019 UPDATE


Chromium (hexavalent)

City of North Platte

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).





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20130.583 ppb28280.0700 ppb - 2.60 ppb
20140.521 ppb26260.0580 ppb - 2.80 ppb

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
2013-10-01201310030367AM0.210 ppb
2013-10-01201310030462AM0.200 ppb
2013-10-01201310030486AM0.390 ppb
2013-10-01201310030247AM0.710 ppb
2013-10-01201310030381AM0.400 ppb
2013-10-01201310030387AM0.180 ppb
2013-10-01201310030488AM0.160 ppb
2013-10-01201310030318AM2.20 ppb
2013-10-01201310030394AM0.330 ppb
2013-10-01201310030397AM0.200 ppb
2013-10-01201310030175AM0.720 ppb
2013-10-01201310040263AM0.320 ppb
2013-10-01201310030407AM0.200 ppb
2013-10-01201310030497AM2.20 ppb
2013-10-02201310040232AM0.220 ppb
2013-10-02201310040242AM0.0730 ppb
2013-10-02201310040126AM0.610 ppb
2013-10-02201310040156AM0.130 ppb
2013-10-02201310040158AM0.220 ppb
2013-10-02201310040270AM0.130 ppb
2013-10-02201310040154AM0.110 ppb
2013-10-02201310040131AM0.230 ppb
2013-10-02201310040139AM0.220 ppb
2013-10-02201310040150AM0.0700 ppb
2013-10-02201310040208AM2.60 ppb
2013-10-02201310040117AM0.1000 ppb
2013-10-02201310040143AM2.60 ppb
2013-10-02201310040166AM0.590 ppb
2014-04-14201404160573AM0.160 ppb
2014-04-14201404160577AM0.210 ppb
2014-04-14201404160896AM0.0580 ppb
2014-04-14201404160561AM0.120 ppb
2014-04-14201404160569AM0.0700 ppb
2014-04-14201404160602AM0.430 ppb
2014-04-14201404160738AM0.280 ppb
2014-04-14201404160823AM0.160 ppb
2014-04-14201404160626AM0.620 ppb
2014-04-14201404160903AM0.120 ppb
2014-04-14201404160608AM0.310 ppb
2014-04-14201404160640AM0.200 ppb
2014-04-14201404160594AM0.670 ppb
2014-04-14201404160892AM0.400 ppb
2014-04-15201404160598AM0.0650 ppb
2014-04-15201404160812AM0.120 ppb
2014-04-15201404160825AM1.60 ppb
2014-04-15201404160831AM2.60 ppb
2014-04-15201404160915AM0.120 ppb
2014-04-15201404160634AM0.260 ppb
2014-04-15201404160632AM0.1000 ppb
2014-04-15201404160575AM2.80 ppb
2014-04-15201404160600AM1.50 ppb
2014-04-15201404160616AM0.260 ppb
2014-04-15201404160606AM0.180 ppb
2014-04-15201404160624AM0.140 ppb