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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Irvine Ranch Water District

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

 

157

Samples

0

Samples exceeding legal limit (MCL)

62

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.290 ppb2322ND - 0.630 ppb
20140.0863 ppb5827ND - 0.720 ppb
20150.118 ppb111ND - 1.30 ppb
20160.436 ppb145ND - 1.50 ppb
20170.0400 ppb251ND - 1.000 ppb
20180.240 ppb112ND - 1.44 ppb
20190.323 ppb154ND - 1.38 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
2013-03-0430100928170.110 ppb
2013-03-0530100929920.510 ppb
2013-03-0530100928160.630 ppb
2013-03-1830100929930.240 ppb
2013-06-103010092817-20.0800 ppb
2013-06-103010092816-20.0900 ppb
2013-06-113010092992-20.480 ppb
2013-06-113010092993-20.0900 ppb
2013-09-033010092817-30.0600 ppb
2013-09-033010092816-30.380 ppb
2013-09-043010092992-30.500 ppb
2013-09-043010092993-30.430 ppb
2013-10-213J24056-07A0.570 ppb
2013-10-213J24056-03AND
2013-10-213J24056-13A0.520 ppb
2013-10-213J24056-01A0.540 ppb
2013-10-213J24056-11A0.0490 ppb
2013-10-213J24056-05A0.0600 ppb
2013-10-213J24056-09A0.0300 ppb
2013-12-093010092817-40.0300 ppb
2013-12-093010092816-40.430 ppb
2013-12-103010092992-40.400 ppb
2013-12-103010092993-40.440 ppb
2014-01-073010092802-10.550 ppb
2014-01-073010092818-10.130 ppb
2014-01-073010092995-10.320 ppb
2014-01-144417-066-0930ND
2014-01-144417-067-1010ND
2014-01-274A29064-01AND
2014-01-284A29064-05AND
2014-01-284A29064-03A0.380 ppb
2014-01-284A29064-07AND
2014-01-284A29064-11A0.420 ppb
2014-01-284A29064-09A0.180 ppb
2014-01-294A29064-13AND
2014-02-053010092809-10.0600 ppb
2014-02-053010092996-10.120 ppb
2014-02-194417-011-1100ND
2014-03-104417-016-0810ND
2014-03-184417-018-0800ND
2014-03-254417-004-0845ND
2014-04-154D17070-01A0.200 ppb
2014-04-154D17070-03A0.0410 ppb
2014-04-154D17070-07A0.250 ppb
2014-04-154D17070-09A0.320 ppb
2014-04-154D17070-05A0.0450 ppb
2014-04-164D17070-13A0.0550 ppb
2014-04-164D17070-11A0.0410 ppb
2014-04-304417-003-0910ND
2014-04-304417-011-0845ND
2014-04-304417-014-0935ND
2014-04-304417-016-0825ND
2014-04-304417-023-1010ND
2014-04-304417-024-1035ND
2014-04-304417-055-1140ND
2014-04-304417-058-1215ND
2014-05-074417-004-0925ND
2014-05-074417-004-0940ND
2014-05-074417-005-0855ND
2014-05-154417-009-0940ND
2014-06-103010092802-20.720 ppb
2014-06-103010092818-20.170 ppb
2014-06-103010092995-20.190 ppb
2014-07-093010092809-20.0400 ppb
2014-07-093010092996-20.150 ppb
2014-07-174317-075-1332ND
2014-07-294G31058-07A0.0700 ppb
2014-07-294G31058-05A0.280 ppb
2014-07-294G31058-09A0.0710 ppb
2014-07-294G31058-01A0.0440 ppb
2014-07-294G31058-03A0.0660 ppb
2014-07-294G31058-11A0.0460 ppb
2014-07-304G31058-13A0.0450 ppb
2014-08-124317-060-1430ND
2014-08-204417-007-0825ND
2014-08-274317-063-0817ND
2014-08-284417-010-1045ND
2014-08-284417-020-1025ND
2014-09-034317-019-1250ND
2014-10-074417-078-1300ND
2014-10-234317-069-1305ND
2015-01-124417-078-1120ND
2015-02-234417-019-0905ND
2015-04-074417-017-10001.30 ppb
2015-04-084417-078-1000ND
2015-04-234317-063-0835ND
2015-05-204417-077-0750ND
2015-07-134417-077-1100ND
2015-07-144417-078-0900ND
2015-07-224317-075-1119ND
2015-08-124317-060-1315ND
2015-10-054417-077-0930ND
2016-01-124417-077-1030ND
2016-01-284417-056-1000ND
2016-01-284417-072-0925ND
2016-04-064417-006-09201.50 ppb
2016-04-074417-017-09201.30 ppb
2016-05-314417-023-0905ND
2016-05-314417-024-0835ND
2016-06-154317-063-0945ND
2016-06-234417-008-08351.10 ppb
2016-07-264417-010-0900ND
2016-08-104417-008-09251.10 ppb
2016-08-104417-008-09401.10 ppb
2016-08-114317-060-1358ND
2016-11-014317-075-1335ND
2017-01-174417-011-08351.000 ppb
2017-01-174417-016-0805ND
2017-01-194417-058-0940ND
2017-01-194417-067-0830ND
2017-01-234417-003-0950ND
2017-01-234417-005-1055ND
2017-01-234417-014-1015ND
2017-02-144417-004-0820ND
2017-02-144417-020-1340ND
2017-02-144417-066-0925ND
2017-02-284317-085-1334ND
2017-03-014417-020-0755ND
2017-03-144417-007-1010ND
2017-03-144417-056-1210ND
2017-03-214317-063-1418ND
2017-03-214317-064-1437ND
2017-03-234417-055-1000ND
2017-03-294317-069-1032ND
2017-04-269588-085-1040ND
2017-06-014417-078-1030ND
2017-08-014417-018-0830ND
2017-08-232706-060-0911ND
2017-08-232706-075-1022ND
2017-11-144417-015-0925ND
2017-12-044417-009-0820ND
2018-02-064417-006-08001.44 ppb
2018-02-064417-017-07201.20 ppb
2018-02-084417-019-0840ND
2018-02-144317-085-1413ND
2018-02-204417-003-1220ND
2018-02-274317-069-1110ND
2018-03-054317-060-1433ND
2018-03-084317-075-1136ND
2018-03-204317-063-0820ND
2018-04-174317-085-1141ND
2018-04-304417-078-0925ND
2019-02-134317-060-1135ND
2019-02-214417-072-1035ND
2019-02-214417-077-0945ND
2019-02-274317-085-0941ND
2019-03-064417-017-08401.38 ppb
2019-03-144317-063-0935ND
2019-03-144317-064-0943ND
2019-03-204317-075-1300ND
2019-04-154417-006-10351.24 ppb
2019-04-154417-017-11301.21 ppb
2019-04-154417-023-1315ND
2019-04-154417-024-1235ND
2019-04-164417-008-08101.01 ppb
2019-06-274417-010-0750ND
2019-07-174317-085-1413ND