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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Pomona Water Department

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.

MORE ABOUT THIS CONTAMINANT

 

175

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20132.01 ppb3027ND - 4.50 ppb
20140.473 ppb347ND - 4.00 ppb
20150.277 ppb262ND - 4.70 ppb
2016ND200ND
2017ND220ND
20183.62 ppb215ND - 20.0 ppb
20190.455 ppb221ND - 10.00 ppb

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
2013-05-08201305080592AM1.10 ppb
2013-05-08201305080588AM3.90 ppb
2013-05-08201305080598AM4.30 ppb
2013-05-08201305080604AM1.20 ppb
2013-05-08201305080606AM0.640 ppb
2013-05-08201305080600AM4.20 ppb
2013-05-08201305080594AMND
2013-05-08201305080602AM0.460 ppb
2013-05-08201305080596AM0.820 ppb
2013-05-08201305080586AM4.30 ppb
2013-05-08201305080590AM0.420 ppb
2013-05-08201305080584AM1.10 ppb
2013-08-08201308080476AM4.50 ppb
2013-08-08201308080478AM2.60 ppb
2013-08-08201308080480AM0.460 ppb
2013-08-08201308080470AMND
2013-08-08201308080472AM4.30 ppb
2013-08-08201308080474AM0.510 ppb
2013-10-02201310020264AM0.900 ppb
2013-10-02201310020266AM0.770 ppb
2013-11-05201311050736AMND
2013-11-05201311050742AM3.80 ppb
2013-11-05201311050746AM1.50 ppb
2013-11-05201311050740AM4.00 ppb
2013-11-05201311050738AM4.10 ppb
2013-11-05201311050744AM0.670 ppb
2013-11-05201311050728AM1.10 ppb
2013-11-05201311050730AM4.00 ppb
2013-11-05201311050734AM0.610 ppb
2013-11-05201311050732AM4.10 ppb
2014-01-029590-042-1105ND
2014-01-069590-033-1012ND
2014-01-069590-038-1046ND
2014-01-089590-052-0842ND
2014-02-04201402040640AM0.470 ppb
2014-02-04201402040636AM3.90 ppb
2014-02-04201402040638AM4.00 ppb
2014-02-04201402040632AM4.00 ppb
2014-02-04201402040634AM0.500 ppb
2014-02-04201402040630AMND
2014-02-279590-051-1000ND
2014-03-189590-013-0955ND
2014-03-269590-036-0957ND
2014-04-019590-010-0836ND
2014-04-019590-040-0939ND
2014-04-029590-025-0836ND
2014-04-099590-071-0935ND
2014-06-109590-028-0740ND
2014-06-309590-031-0940ND
2014-07-029590-032-0813ND
2014-07-079590-033-0847ND
2014-07-079590-038-0945ND
2014-07-079590-042-1135ND
2014-07-169590-010-0925ND
2014-07-169590-052-0856ND
2014-08-289590-027-0930ND
2014-09-16201409170324AM1.60 ppb
2014-09-16201409170326AM1.60 ppb
2014-10-019590-025-0818ND
2014-10-029590-010-1230ND
2014-10-069590-071-0918ND
2014-10-079590-040-1220ND
2014-11-039590-069-1122ND
2014-12-099590-035-0943ND
2015-01-059590-033-1052ND
2015-01-059590-038-0946ND
2015-01-059590-042-1030ND
2015-01-139590-052-0800ND
2015-02-269590-036-0922ND
2015-03-17201503170763AM2.50 ppb
2015-03-17201503170765AM4.70 ppb
2015-03-319590-025-1023ND
2015-04-019590-010-0830ND
2015-04-069590-071-1131ND
2015-04-159590-025-0805ND
2015-04-169590-040-0810ND
2015-05-209590-031-1017ND
2015-06-109590-028-0844ND
2015-07-069590-038-0857ND
2015-07-069590-042-0959ND
2015-07-079590-052-0745ND
2015-07-089590-032-0815ND
2015-07-099590-027-0910ND
2015-08-109590-033-1005ND
2015-10-019590-010-0930ND
2015-10-019590-025-1025ND
2015-10-059590-071-1040ND
2015-10-089590-040-1256ND
2015-10-209590-035-1021ND
2015-12-019590-042-0902ND
2016-01-049590-042-1250ND
2016-01-069590-033-0947ND
2016-01-119590-038-0907ND
2016-01-129590-036-0850ND
2016-01-139590-052-0923ND
2016-04-049590-071-1009ND
2016-04-069590-010-0840ND
2016-04-079590-040-0822ND
2016-04-129590-025-0934ND
2016-05-169590-031-1000ND
2016-06-029590-028-1115ND
2016-07-059590-038-0954ND
2016-07-059590-052-1111ND
2016-07-149590-033-1000ND
2016-07-149590-042-0845ND
2016-07-209590-027-0945ND
2016-10-129590-071-0942ND
2016-10-179590-025-1450ND
2016-10-209590-040-1145ND
2016-10-269590-010-0820ND
2017-01-049590-033-1130ND
2017-01-059590-038-1015ND
2017-01-179590-052-1143ND
2017-01-259590-051-0910ND
2017-03-099590-042-1005ND
2017-04-069590-071-1145ND
2017-04-139590-025-0940ND
2017-04-139590-040-0900ND
2017-04-209590-010-1315ND
2017-05-179590-036-1045ND
2017-07-119590-038-1040ND
2017-07-139590-033-0930ND
2017-07-139590-042-1150ND
2017-07-209590-010-1356ND
2017-07-249590-027-1415ND
2017-07-259590-025-1520ND
2017-10-199590-069-1035ND
2017-10-199590-071-1052ND
2017-10-259590-032-1115ND
2017-10-269590-010-1117ND
2017-10-269590-040-1200ND
2017-12-069590-032-1306ND
2018-01-049590-033-130113.0 ppb
2018-01-119590-033-141015.0 ppb
2018-01-119590-038-132520.0 ppb
2018-01-189590-042-1313ND
2018-01-229590-052-122716.0 ppb
2018-02-169590-025-1219ND
2018-04-129590-010-0920ND
2018-04-169590-071-0956ND
2018-04-189590-040-1330ND
2018-05-239590-028-1006ND
2018-06-139590-063-0955ND
2018-07-119590-033-1309ND
2018-07-169590-038-133312.0 ppb
2018-07-179590-042-1055ND
2018-07-189590-027-1408ND
2018-07-199590-031-0951ND
2018-07-259590-025-0820ND
2018-10-229590-010-1130ND
2018-10-239590-071-0935ND
2018-10-259590-040-0928ND
2018-12-069590-063-0820ND
2019-01-039590-052-1011ND
2019-01-099590-033-1045ND
2019-01-239590-038-0843ND
2019-01-249590-025-1116ND
2019-01-299590-042-1256ND
2019-01-309590-032-0915ND
2019-02-209590-042-144310.00 ppb
2019-04-049590-071-0901ND
2019-04-119590-040-1202ND
2019-04-179590-035-1010ND
2019-04-179590-036-1005ND
2019-04-179590-063-1354ND
2019-07-029590-042-1220ND
2019-07-039590-038-1400ND
2019-07-109590-031-1326ND
2019-07-189590-025-1120ND
2019-07-189590-027-1156ND
2019-07-189590-052-1330ND
2019-09-129590-010-1041ND
2019-10-039590-063-1340ND
2019-10-109590-040-1028ND
2019-10-109590-071-1316ND