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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

California American Water Company - Antelope

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

 

224

Samples

0

Samples exceeding legal limit (MCL)

173

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20136.56 ppb56561.74 ppb - 14.8 ppb
20147.25 ppb19191.50 ppb - 13.0 ppb
201511.6 ppb10109.39 ppb - 12.7 ppb
201610.2 ppb779.35 ppb - 10.8 ppb
20176.78 ppb2926ND - 15.4 ppb
20184.44 ppb6233ND - 13.0 ppb
20194.10 ppb4122ND - 14.0 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
2013-02-05208996018.63 ppb
2013-02-05209006019.77 ppb
2013-02-06209011016.91 ppb
2013-02-06208987018.89 ppb
2013-02-06208992018.67 ppb
2013-02-06208994018.67 ppb
2013-02-06209003016.01 ppb
2013-02-06209004018.68 ppb
2013-02-11208989013.21 ppb
2013-02-11209007011.74 ppb
2013-03-05208999014.41 ppb
2013-03-05209000012.94 ppb
2013-03-05208990015.29 ppb
2013-03-05208993012.70 ppb
2013-03-11209001013.95 ppb
2013-03-11208988013.46 ppb
2013-03-11208995017.64 ppb
2013-03-112090090110.3 ppb
2013-03-12208991012.94 ppb
2013-03-12208998012.93 ppb
2013-03-12209010017.59 ppb
2013-03-12209002012.55 ppb
2013-06-27229538019.47 ppb
2013-06-27229537017.57 ppb
2013-06-27229536015.08 ppb
2013-06-27209008014.91 ppb
2013-06-27229539019.54 ppb
2013-06-272090050114.8 ppb
2013-08-07230139015.03 ppb
2013-08-07230124013.51 ppb
2013-08-07230126013.74 ppb
2013-08-07230144013.54 ppb
2013-08-08230138014.24 ppb
2013-08-08230131019.30 ppb
2013-08-08230129019.37 ppb
2013-08-08230123014.58 ppb
2013-08-08230143019.60 ppb
2013-08-082301400110.2 ppb
2013-08-12230148017.37 ppb
2013-08-12230136014.43 ppb
2013-08-12230127017.31 ppb
2013-08-12230130018.39 ppb
2013-08-12230125014.42 ppb
2013-08-122301460111.4 ppb
2013-08-13230133017.66 ppb
2013-08-13230122016.57 ppb
2013-08-13230147017.53 ppb
2013-08-13230141016.62 ppb
2013-08-15230137013.03 ppb
2013-08-15234745013.83 ppb
2013-12-122420560110.5 ppb
2013-12-12242054013.24 ppb
2013-12-12242055017.94 ppb
2013-12-12245762013.23 ppb
2013-12-12245761018.53 ppb
2013-12-122457600112.8 ppb
2014-05-065810-004-11167.90 ppb
2014-05-065810-010-12161.60 ppb
2014-05-065810-011-10389.20 ppb
2014-05-065810-013-11246.40 ppb
2014-05-065810-014-10295.80 ppb
2014-05-065810-018-13071.50 ppb
2014-05-075810-001-09357.20 ppb
2014-05-075810-002-11344.30 ppb
2014-05-075810-007-11005.30 ppb
2014-05-075810-008-12096.10 ppb
2014-05-075810-009-10543.60 ppb
2014-05-075810-016-09303.30 ppb
2014-05-075810-017-10174.80 ppb
2014-12-181225-003-103711.0 ppb
2014-12-185810-003-103712.0 ppb
2014-12-181225-005-095710.8 ppb
2014-12-185810-005-095712.0 ppb
2014-12-181225-006-090011.8 ppb
2014-12-185810-006-090013.0 ppb
2015-03-251225-003-093312.3 ppb
2015-03-251225-005-102011.3 ppb
2015-03-251225-006-112212.7 ppb
2015-05-141225-012-12079.39 ppb
2015-06-091225-003-093310.9 ppb
2015-06-091225-005-103811.1 ppb
2015-06-091225-006-113612.2 ppb
2015-09-091225-003-124812.0 ppb
2015-09-091225-005-130111.3 ppb
2015-09-091225-006-093612.5 ppb
2016-03-171225-003-10059.79 ppb
2016-03-171225-005-104010.7 ppb
2016-03-171225-006-111510.8 ppb
2016-06-221225-005-12039.71 ppb
2016-06-221225-006-12359.35 ppb
2016-09-151225-005-111010.7 ppb
2016-12-181225-005-155810.3 ppb
2017-03-011225-005-09568.16 ppb
2017-05-081225-002-1400ND
2017-05-081225-009-10001.72 ppb
2017-05-081225-013-08355.74 ppb
2017-05-081225-014-10405.00 ppb
2017-05-081225-016-08552.98 ppb
2017-05-081225-017-11001.51 ppb
2017-05-091225-001-12558.18 ppb
2017-05-091225-005-081513.1 ppb
2017-05-091225-010-13471.93 ppb
2017-05-091225-011-090011.6 ppb
2017-05-091225-012-093011.4 ppb
2017-05-091225-018-14551.99 ppb
2017-05-111225-007-10404.41 ppb
2017-05-111225-008-09568.48 ppb
2017-06-051225-011-083211.9 ppb
2017-06-051225-012-092515.4 ppb
2017-08-171225-004-11276.31 ppb
2017-08-171225-005-093511.2 ppb
2017-09-121225-011-09356.28 ppb
2017-09-121225-012-12569.83 ppb
2017-11-081225-005-092010.3 ppb
2017-12-121225-011-11506.28 ppb
2017-12-121225-012-09007.94 ppb
2017-12-181233-006-13408.20 ppb
2017-12-181233-039-1350ND
2017-12-181233-040-13555.70 ppb
2017-12-181233-042-1345ND
2017-12-271233-003-115011.0 ppb
2018-01-041233-039-1512ND
2018-01-041233-040-1355ND
2018-01-041233-042-1345ND
2018-01-101233-039-0815ND
2018-01-101233-040-0820ND
2018-01-101233-042-0810ND
2018-01-181233-039-1225ND
2018-01-181233-040-1230ND
2018-01-181233-042-1220ND
2018-02-131225-003-130012.6 ppb
2018-02-131233-003-130012.0 ppb
2018-02-131225-006-120012.3 ppb
2018-02-131233-006-120011.0 ppb
2018-02-131233-039-1210ND
2018-02-131233-040-1215ND
2018-02-131233-042-1205ND
2018-02-151225-005-12108.65 ppb
2018-02-271233-003-11507.20 ppb
2018-03-081225-039-0950ND
2018-03-081233-039-0950ND
2018-03-081225-040-09555.82 ppb
2018-03-081233-040-09555.20 ppb
2018-03-081225-042-0945ND
2018-03-081233-042-0945ND
2018-03-121225-011-12003.44 ppb
2018-03-121225-012-10509.07 ppb
2018-03-151233-003-10106.80 ppb
2018-03-151233-039-1020ND
2018-03-151233-040-10255.40 ppb
2018-03-151233-042-1015ND
2018-03-231233-039-0920ND
2018-03-231233-040-09254.80 ppb
2018-03-231233-042-0915ND
2018-03-281233-039-0950ND
2018-03-281233-040-09555.70 ppb
2018-03-281233-042-0945ND
2018-04-031225-039-0940ND
2018-04-031233-039-0940ND
2018-04-031225-040-09456.12 ppb
2018-04-031233-040-09456.10 ppb
2018-04-031233-042-0935ND
2018-05-021225-003-113511.9 ppb
2018-05-021233-003-113513.0 ppb
2018-05-021225-005-09459.55 ppb
2018-05-021225-006-104010.3 ppb
2018-05-021233-006-104010.00 ppb
2018-05-021225-011-08454.76 ppb
2018-05-021225-012-10108.49 ppb
2018-05-021225-039-1050ND
2018-05-021225-040-10553.00 ppb
2018-05-021225-042-1045ND
2018-06-201225-039-1200ND
2018-06-201225-040-12053.36 ppb
2018-06-201225-042-1155ND
2018-08-071225-011-11203.77 ppb
2018-08-071225-012-10309.43 ppb
2018-08-141233-003-113012.0 ppb
2018-08-141233-006-100010.00 ppb
2018-11-051225-011-09259.28 ppb
2018-11-061225-012-101510.2 ppb
2018-11-091233-003-100011.0 ppb
2018-11-091233-006-073513.0 ppb
2019-01-101233-039-0850ND
2019-01-101233-040-08555.80 ppb
2019-01-101233-042-0845ND
2019-02-181233-003-130513.0 ppb
2019-02-181233-006-120012.0 ppb
2019-03-131233-039-0905ND
2019-03-131233-040-09104.80 ppb
2019-03-131233-042-0900ND
2019-04-101233-039-0832ND
2019-04-101233-040-08351.50 ppb
2019-04-101233-042-0830ND
2019-05-161233-003-11409.90 ppb
2019-05-161233-006-112012.0 ppb
2019-05-161225-012-122111.1 ppb
2019-06-121233-039-0828ND
2019-06-121233-040-08314.90 ppb
2019-06-121233-042-0825ND
2019-07-231233-039-0828ND
2019-07-231233-040-08311.40 ppb
2019-07-231233-042-0825ND
2019-08-061233-003-130014.0 ppb
2019-08-061233-006-083010.00 ppb
2019-08-061233-039-08363.70 ppb
2019-08-061233-040-08403.00 ppb
2019-08-061233-042-0833ND
2019-08-081225-012-135810.2 ppb
2019-09-101233-039-0835ND
2019-09-101233-040-08382.70 ppb
2019-09-101233-042-0832ND
2019-10-161233-039-0935ND
2019-10-161233-040-09403.40 ppb
2019-10-161233-042-0930ND
2019-11-051233-003-132514.0 ppb
2019-11-051233-006-122514.0 ppb
2019-11-051225-012-17059.93 ppb
2019-11-051233-039-1235ND
2019-11-051233-040-12404.00 ppb
2019-11-051233-042-1230ND
2019-12-091233-039-0820ND
2019-12-091233-040-08253.00 ppb
2019-12-091233-042-0815ND