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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Coastside County Water District

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

 

142

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.187 ppb31ND - 0.560 ppb
20140.0796 ppb243ND - 1.50 ppb
20151.87 ppb215ND - 15.0 ppb
2016ND220ND
2017ND240ND
2018ND220ND
20192.12 ppb2621ND - 7.00 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
2013-12-11A3J1692-04A0.560 ppb
2013-12-11A3J1692-06AND
2013-12-11A3J1692-01AND
2014-03-11A4B2102-06A1.50 ppb
2014-03-11A4B2102-04A0.200 ppb
2014-03-11A4B2102-01AND
2014-03-11A4B2096-01AND
2014-03-171395-011-1040ND
2014-03-191395-010-1130ND
2014-05-071395-010-0925ND
2014-05-141395-011-0840ND
2014-06-041395-011-0910ND
2014-06-171395-010-1045ND
2014-07-081395-010-1050ND
2014-07-161395-011-0900ND
2014-08-061395-010-1200ND
2014-08-061395-011-0940ND
2014-09-101395-011-0940ND
2014-09-15A4H2149-06AND
2014-09-15A4H2149-04A0.210 ppb
2014-09-15A4H2149-01AND
2014-10-011395-011-0915ND
2014-11-041395-011-0910ND
2014-11-241395-010-1210ND
2014-12-101395-010-1117ND
2014-12-101395-011-1025ND
2014-12-30A4K1350-01AND
2015-01-061395-010-1000ND
2015-01-061395-011-0835ND
2015-02-111395-011-0850ND
2015-02-191395-010-0945ND
2015-03-041395-010-1015ND
2015-03-101395-011-1030ND
2015-03-251395-002-1015ND
2015-04-071395-010-1055ND
2015-04-071395-011-0945ND
2015-05-061395-011-0920ND
2015-05-131395-010-0930ND
2015-06-011395-011-1000ND
2015-07-081395-011-0910ND
2015-08-031395-011-09505.00 ppb
2015-09-021395-011-0850ND
2015-10-061395-011-09207.00 ppb
2015-11-041395-011-0830ND
2015-12-011395-011-0830ND
2015-12-071395-010-094015.0 ppb
2015-12-14A5L0325-01A1.20 ppb
2015-12-161395-013-120011.0 ppb
2016-01-051395-010-1025ND
2016-01-051395-011-0940ND
2016-02-021395-011-1020ND
2016-02-171395-010-1030ND
2016-03-021395-011-1030ND
2016-03-301395-010-0950ND
2016-04-061395-010-1005ND
2016-04-061395-011-0930ND
2016-05-041395-010-1030ND
2016-05-041395-011-0910ND
2016-06-011395-010-1025ND
2016-06-011395-011-0800ND
2016-07-131395-010-0800ND
2016-07-131395-011-0900ND
2016-08-101395-010-0900ND
2016-08-101395-011-1100ND
2016-09-131395-010-1020ND
2016-09-131395-011-0915ND
2016-10-051395-011-0935ND
2016-11-011395-011-0940ND
2016-12-071395-010-1340ND
2016-12-071395-011-1100ND
2017-01-031395-010-1051ND
2017-01-031395-011-1000ND
2017-02-071395-011-0900ND
2017-02-141395-011-1030ND
2017-03-011395-011-0915ND
2017-03-151395-010-1115ND
2017-04-041395-010-1125ND
2017-04-041395-011-0915ND
2017-05-031395-010-0915ND
2017-05-031395-011-0900ND
2017-06-071395-010-0940ND
2017-06-071395-011-1100ND
2017-07-051395-010-0954ND
2017-07-051395-011-0925ND
2017-08-021395-010-1230ND
2017-08-021395-011-1030ND
2017-09-071395-010-1045ND
2017-09-071395-011-0910ND
2017-10-041395-011-0900ND
2017-10-121395-010-1325ND
2017-11-011395-010-0935ND
2017-11-011395-011-0805ND
2017-12-061395-010-0955ND
2017-12-061395-011-0850ND
2018-01-081395-010-1140ND
2018-01-081395-011-1325ND
2018-02-061395-010-1350ND
2018-02-061395-011-1245ND
2018-02-201395-011-1425ND
2018-03-141395-010-1110ND
2018-03-141395-011-1350ND
2018-04-101395-011-1500ND
2018-04-191395-010-1250ND
2018-05-021395-010-1440ND
2018-05-021395-011-1340ND
2018-06-061395-010-1300ND
2018-06-061395-011-1315ND
2018-07-051395-010-1317ND
2018-07-051395-011-1245ND
2018-08-011395-010-1350ND
2018-08-011395-011-1410ND
2018-09-041395-011-1328ND
2018-10-031395-011-1250ND
2018-11-071395-011-1300ND
2018-12-051395-011-1250ND
2018-12-111395-010-1315ND
2019-01-021395-010-14157.00 ppb
2019-01-021395-011-13076.00 ppb
2019-02-051395-011-13052.00 ppb
2019-02-191395-010-13001.000 ppb
2019-02-191395-011-10251.000 ppb
2019-03-061395-011-12552.00 ppb
2019-03-131395-010-1135ND
2019-04-021395-010-13552.00 ppb
2019-04-021395-011-13002.00 ppb
2019-04-171395-002-10104.00 ppb
2019-05-021395-010-14453.00 ppb
2019-05-021395-011-13252.00 ppb
2019-06-061395-010-12274.00 ppb
2019-06-061395-011-13154.00 ppb
2019-07-011395-010-13551.000 ppb
2019-07-011395-011-12551.000 ppb
2019-08-061395-010-14002.00 ppb
2019-08-061395-011-1255ND
2019-09-031395-010-14052.00 ppb
2019-09-031395-011-12551.000 ppb
2019-10-011395-010-10103.00 ppb
2019-10-011395-011-10004.00 ppb
2019-11-061395-010-1330ND
2019-11-061395-011-1230ND
2019-12-031395-010-13451.000 ppb
2019-12-031395-011-1250ND