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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Iredell Water 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).

MORE ABOUT THIS CONTAMINANT

 

90

Samples

0

Samples exceeding legal limit (MCL)

56

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.393 ppb2214ND - 1.30 ppb
20140.636 ppb3425ND - 4.90 ppb
20150.260 ppb3417ND - 1.60 ppb
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/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
2013-04-23201304250470AM0.550 ppb
2013-04-23201304250464AMND
2013-04-23201304250466AMND
2013-04-23201304250457AM1.30 ppb
2013-04-23201304250427AMND
2013-04-23201304250512AMND
2013-04-23201304250500AM0.270 ppb
2013-04-23201304250422AM0.700 ppb
2013-04-23201304250468AM0.0470 ppb
2013-04-23201304250510AM1.10 ppb
2013-04-23201304250497AM0.700 ppb
2013-10-21201310220197AM0.400 ppb
2013-10-21201310220221AM1.20 ppb
2013-10-21201310220199AMND
2013-10-21201310220213AMND
2013-10-21201310220072AM0.970 ppb
2013-10-21201310220234AMND
2013-10-21201310220092AM0.0310 ppb
2013-10-21201310220063AM0.580 ppb
2013-10-21201310220238AMND
2013-10-21201310220149AM0.170 ppb
2013-10-21201310220101AM0.630 ppb
2014-04-28201404290263AM0.200 ppb
2014-04-28201404290278AM3.60 ppb
2014-04-28201404290222AMND
2014-04-28201404290284AM0.940 ppb
2014-04-28201404290241AM0.0700 ppb
2014-04-28201404290268AMND
2014-04-28201404290367AM1.20 ppb
2014-04-28201404290233AM0.580 ppb
2014-04-28201404290231AM0.600 ppb
2014-04-28201404290255AM0.360 ppb
2014-04-28201404290245AM0.610 ppb
2014-04-28201404290270AMND
2014-04-28201404300415AM0.380 ppb
2014-04-28201404290292AM0.0520 ppb
2014-04-28201404290225AM0.700 ppb
2014-04-28201404290276AM1.20 ppb
2014-04-28201404290227AMND
2014-10-28201410290296AM0.660 ppb
2014-10-28201410290517AMND
2014-10-28201410290549AMND
2014-10-28201410290450AMND
2014-10-28201410290495AM4.90 ppb
2014-10-28201410290539AM0.0710 ppb
2014-10-28201410290282AM0.380 ppb
2014-10-28201410290323AM0.580 ppb
2014-10-28201410290436AMND
2014-10-28201410290452AM0.640 ppb
2014-10-28201410290417AM0.290 ppb
2014-10-28201410290397AM0.530 ppb
2014-10-28201410290528AM1.10 ppb
2014-10-28201410290474AMND
2014-10-28201410290493AM0.350 ppb
2014-10-29201410290343AM1.10 ppb
2014-11-10201411110176AM0.540 ppb
2015-04-13201504140759AMND
2015-04-13201504140625AMND
2015-04-13201504140775AMND
2015-04-13201504140771AM0.0920 ppb
2015-04-13201504140693AMND
2015-04-13201504140657AMND
2015-04-13201504140766AM0.0620 ppb
2015-04-13201504140610AM0.160 ppb
2015-04-13201504140689AM0.0700 ppb
2015-04-14201504150517AM1.50 ppb
2015-04-14201504150541AMND
2015-04-14201504150407AM0.200 ppb
2015-04-14201504150912AM0.120 ppb
2015-04-14201504150376AMND
2015-04-14201504150443AM1.40 ppb
2015-04-14201504150526AMND
2015-04-14201504150937AM1.40 ppb
2015-10-28201510300303AM1.60 ppb
2015-10-28201510290276AMND
2015-10-28201510290298AMND
2015-10-28201510290416AMND
2015-10-28201510290302AM1.40 ppb
2015-10-28201510290392AMND
2015-10-28201510290362AMND
2015-10-28201510300260AMND
2015-10-28201510290342AMND
2015-10-29201510300332AM0.1000 ppb
2015-10-29201510300309AM0.0980 ppb
2015-10-29201510300267AMND
2015-10-29201510300264AM0.160 ppb
2015-10-29201510300290AM0.190 ppb
2015-10-29201510300305AM0.210 ppb
2015-10-29201510300307AMND
2015-10-29201510300280AM0.0750 ppb