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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Iredell Water Corporation

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

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152

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.360 ppb2211ND - 1.30 ppb
20140.490 ppb4723ND - 4.90 ppb
20150.125 ppb419ND - 1.80 ppb
2016ND50ND
2017ND170ND
2018ND200ND
2019N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date Lab ID Result
2013-04-23201304250500AM0.270 ppb
2013-04-23201304250427AMND
2013-04-23201304250512AMND
2013-04-23201304250497AM0.750 ppb
2013-04-23201304250464AMND
2013-04-23201304250466AMND
2013-04-23201304250457AM1.30 ppb
2013-04-23201304250468AMND
2013-04-23201304250470AM0.560 ppb
2013-04-23201304250422AM0.750 ppb
2013-04-23201304250510AM0.980 ppb
2013-10-21201310220149AMND
2013-10-21201310220213AMND
2013-10-21201310220238AMND
2013-10-21201310220063AM0.560 ppb
2013-10-21201310220199AMND
2013-10-21201310220234AMND
2013-10-21201310220072AM0.860 ppb
2013-10-21201310220101AM0.530 ppb
2013-10-21201310220197AM0.360 ppb
2013-10-21201310220092AMND
2013-10-21201310220221AM1.000 ppb
2014-03-03140303-21ND
2014-03-03140303-20ND
2014-03-03140303-19ND
2014-03-03140303-25ND
2014-03-03140303-24ND
2014-03-03140303-23ND
2014-03-03140303-22ND
2014-04-15140415-26ND
2014-04-28201404290292AMND
2014-04-28201404290276AM1.30 ppb
2014-04-28201404290227AMND
2014-04-28201404290225AM0.650 ppb
2014-04-28201404290222AMND
2014-04-28201404290284AM0.980 ppb
2014-04-28201404290241AMND
2014-04-28201404290263AM0.220 ppb
2014-04-28201404290268AMND
2014-04-28201404290231AM0.590 ppb
2014-04-28201404290367AM1.10 ppb
2014-04-28201404290233AM0.580 ppb
2014-04-28201404290255AM0.360 ppb
2014-04-28201404290245AM0.610 ppb
2014-04-28201404290270AMND
2014-04-28201404300415AM0.380 ppb
2014-04-28201404290278AM3.60 ppb
2014-05-20140520-32ND
2014-08-11140811-5.2ND
2014-08-11140811-5.1ND
2014-08-11140811-5.3ND
2014-08-11140811-5.4ND
2014-10-28201410290539AM0.220 ppb
2014-10-28201410290452AM0.760 ppb
2014-10-28201410290417AM0.540 ppb
2014-10-28201410290397AM0.700 ppb
2014-10-28201410290474AMND
2014-10-28201410290528AM1.20 ppb
2014-10-28201410290450AMND
2014-10-28201410290436AMND
2014-10-28201410290323AM0.600 ppb
2014-10-28201410290296AM0.750 ppb
2014-10-28201410290282AM0.520 ppb
2014-10-28201410290273AM0.830 ppb
2014-10-28201410290549AMND
2014-10-28201410290517AMND
2014-10-28201410290493AM0.450 ppb
2014-10-28201410290495AM4.90 ppb
2014-10-29201410290343AM1.20 ppb
2015-01-06ND
2015-02-02ND
2015-03-04ND
2015-03-04ND
2015-04-13201504140759AMND
2015-04-13201504140775AMND
2015-04-13201504140693AMND
2015-04-13201504140689AMND
2015-04-13201504140657AMND
2015-04-13201504140766AMND
2015-04-13201504140771AMND
2015-04-13201504140610AM0.210 ppb
2015-04-13201504140625AMND
2015-04-14ND
2015-05-20ND
2015-05-20ND
2015-07-14ND
2015-07-14ND
2015-07-14ND
2015-07-15ND
2015-07-15ND
2015-08-12ND
2015-10-14ND
2015-10-14ND
2015-10-28201510300260AMND
2015-10-28201510290362AMND
2015-10-28201510290342AMND
2015-10-28201510300303AM1.80 ppb
2015-10-28201510290302AM1.40 ppb
2015-10-28201510290298AMND
2015-10-28201510290276AM0.350 ppb
2015-10-28201510290416AMND
2015-10-28201510290392AMND
2015-10-29201510300267AMND
2015-10-29201510300332AM0.230 ppb
2015-10-29201510300305AM0.290 ppb
2015-10-29201510300307AMND
2015-10-29201510300309AMND
2015-10-29201510300280AM0.280 ppb
2015-10-29201510300290AM0.300 ppb
2015-10-29201510300264AM0.270 ppb
2016-03-16160316-27-01-02ND
2016-07-06160706-27-01-1ND
2016-08-24160824-13-01-2ND
2016-10-04161004-33-01-IOCND
2016-10-04161004-29-01-IOCND
2017-01-18170118-39-IOCND
2017-01-18170118-41-IOCND
2017-01-18170118-40ND
2017-02-22170222-20-01-IOCND
2017-02-22170222-09-01-IOCND
2017-03-22170322-19-01-IOCND
2017-03-22170322-18-01-IOCND
2017-03-22170322-20-01-IOCND
2017-04-05170405-19-01-IOCND
2017-04-05170405-20-01-IOCND
2017-04-05170405-17-01-IOCND
2017-04-05170405-18-01-IOCND
2017-05-24170524-24-01-IOCND
2017-05-24170524-25-01-IOCND
2017-05-24170524-26-01-IOCND
2017-06-28170628-09-IOCND
2017-06-28170628-10-01-IOCND
2018-01-10180110-33-01-IOCND
2018-01-10180110-34-01-IOCND
2018-01-10180110-35-01-IOCND
2018-01-10180110-36-01-IOCND
2018-02-21180221-23-01 ND
2018-02-21180221-24-01-IOCND
2018-02-21180221-26-01-IOCND
2018-02-211890221-25-01-IOND
2018-03-21180321-17-01 IOCND
2018-03-21180321-19-01-IOCND
2018-03-21180321-22-01-IOCND
2018-03-211803621-18-01-IOND
2018-04-23180423-33-01-IOCND
2018-04-23180423-34-01-IOCND
2018-04-23180423-35-01-IOCND
2018-05-09180509-23-01-IOCND
2018-05-09180509-24-01-IOCND
2018-06-27180627-26-01-IOCND
2018-06-27180627-27-01-IOCND
2018-06-27180627-28-01-IOCND