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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

San Juan Basin Authority

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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131

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND120ND
2016ND110ND
2017ND100ND
2018ND100ND
2019ND760ND

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
2014-02-119590-010-1058ND
2014-05-069590-010-1340ND
2014-08-059590-003-1000ND
2014-08-059590-004-1035ND
2014-08-059590-005-1105ND
2014-08-059590-006-0920ND
2014-08-059590-014-0835ND
2014-08-059590-015-0750ND
2014-08-129590-010-1005ND
2014-09-039590-001-1300ND
2014-09-239590-002-1315ND
2014-11-119590-010-0748ND
2015-02-109590-010-1300ND
2015-05-139590-010-1044ND
2015-08-129590-010-0916ND
2015-08-249590-002-1308ND
2015-08-249590-003-1313ND
2015-08-249590-004-1319ND
2015-08-259590-001-0816ND
2015-08-259590-005-0833ND
2015-08-259590-006-0805ND
2015-08-259590-014-0755ND
2015-08-259590-015-0708ND
2015-11-099590-010-0945ND
2016-02-019590-010-1121ND
2016-02-089590-001-1000ND
2016-02-089590-002-1027ND
2016-02-089590-003-1040ND
2016-02-089590-004-1052ND
2016-02-089590-005-1110ND
2016-02-089590-006-0840ND
2016-02-089590-014-0852ND
2016-02-089590-015-0909ND
2016-05-099590-010-0947ND
2016-08-089590-010-0824ND
2017-02-099590-002-0850ND
2017-02-099590-003-0930ND
2017-02-099590-004-1000ND
2017-02-189590-010-1210ND
2017-05-099590-010-0735ND
2017-08-089590-001-0820ND
2017-08-089590-005-1105ND
2017-08-159590-010-1125ND
2017-09-289590-004-0915ND
2017-11-069590-010-1145ND
2018-02-219590-001-0845ND
2018-02-219590-005-1006ND
2018-05-219590-010-1110ND
2018-08-089590-001-0845ND
2018-08-089590-002-0940ND
2018-08-089590-003-1030ND
2018-08-089590-004-1115ND
2018-08-089590-005-1200ND
2018-08-139590-010-1125ND
2018-11-129590-010-1030ND
2019-02-124792-010-1415ND
2019-03-124792-010-1210ND
2019-03-134792-001-1200ND
2019-03-134792-002-1045ND
2019-03-134792-004-1115ND
2019-03-134792-005-1235ND
2019-03-134792-006-0940ND
2019-03-304792-006-0700ND
2019-03-304792-015-1100ND
2019-04-084792-001-0920ND
2019-04-084792-003-0950ND
2019-04-084792-004-1010ND
2019-04-084792-005-1040ND
2019-04-084792-006-0830ND
2019-04-094792-010-1345ND
2019-04-094792-015-1055ND
2019-05-144792-001-0939ND
2019-05-144792-003-0838ND
2019-05-144792-004-0756ND
2019-05-144792-005-1232ND
2019-05-144792-006-1118ND
2019-05-144792-010-1300ND
2019-05-144792-015-1030ND
2019-06-114792-001-1120ND
2019-06-114792-002-1015ND
2019-06-114792-003-1045ND
2019-06-114792-004-0940ND
2019-06-114792-005-1335ND
2019-06-114792-006-1335ND
2019-06-114792-010-1205ND
2019-06-114792-015-1215ND
2019-07-084792-001-0950ND
2019-07-084792-002-1035ND
2019-07-084792-003-1055ND
2019-07-084792-004-1020ND
2019-07-084792-005-1400ND
2019-07-084792-006-1315ND
2019-07-094792-010-0950ND
2019-07-094792-015-0900ND
2019-08-134792-001-0930ND
2019-08-134792-002-1010ND
2019-08-134792-003-1025ND
2019-08-134792-004-0955ND
2019-08-134792-005-1210ND
2019-08-134792-006-1155ND
2019-08-134792-010-1142ND
2019-08-134792-015-1125ND
2019-09-104792-001-1045ND
2019-09-104792-002-1145ND
2019-09-104792-003-1210ND
2019-09-104792-004-1125ND
2019-09-104792-005-1230ND
2019-09-104792-006-0955ND
2019-09-104792-010-1130ND
2019-09-104792-015-0935ND
2019-10-154792-001-0740ND
2019-10-154792-002-1110ND
2019-10-154792-003-1135ND
2019-10-154792-004-1025ND
2019-10-154792-005-1345ND
2019-10-154792-006-0945ND
2019-10-154792-010-1015ND
2019-10-154792-015-0845ND
2019-11-124792-010-0905ND
2019-11-194792-001-1032ND
2019-11-194792-002-1057ND
2019-11-194792-003-1130ND
2019-11-194792-005-1215ND
2019-11-194792-006-0955ND
2019-11-194792-015-0900ND
2019-12-104792-001-0945ND
2019-12-104792-002-1025ND
2019-12-104792-003-1105ND
2019-12-104792-005-1145ND
2019-12-104792-006-0905ND
2019-12-104792-010-1100ND