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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of Manteca

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.

 

60

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
20131.19 ppb198ND - 4.50 ppb
20143.03 ppb64ND - 13.0 ppb
20151.15 ppb2111ND - 4.30 ppb
2016ND40ND
2017ND20ND

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
2012-02-085810-044-0745ND
2012-05-085810-028-0810ND
2012-05-085810-016-1115ND
2012-05-085810-013-0710ND
2012-06-125810-049-0717ND
2012-08-145810-015-0920ND
2012-09-115810-030-0927ND
2012-12-115810-036-1125ND
2013-04-105810-012-0805ND
2013-05-14A3E1304-01AND
2013-05-14A3E1304-04AND
2013-05-155810-034-0746ND
2013-06-055810-038-0745ND
2013-07-175810-032-0730ND
2013-08-145810-014-0810ND
2013-11-18A3J2218-15A1.70 ppb
2013-11-19A3J2218-05AND
2013-11-19A3J2218-13AND
2013-11-19A3J2218-11A1.90 ppb
2013-11-19A3J2218-21A4.50 ppb
2013-11-19A3J2230-03AND
2013-11-19A3J2218-23A2.60 ppb
2013-11-19A3J2218-17A4.40 ppb
2013-11-19A3J2218-19A1.80 ppb
2013-11-19A3J2218-01A3.80 ppb
2013-11-19A3J2230-01AND
2013-11-19A3J2218-09A1.90 ppb
2014-01-15A3L1892-01A2.10 ppb
2014-01-15A3L1892-03A1.10 ppb
2014-02-26A4B0701-03A2.00 ppb
2014-04-085810-040-0825ND
2014-04-23A4D1242-01AND
2014-06-105810-042-075013.0 ppb
2015-02-105810-044-0644ND
2015-05-125810-016-0725ND
2015-05-125810-028-1535ND
2015-05-125810-013-0750ND
2015-06-095810-049-0650ND
2015-07-07A5D1723-07A0.780 ppb
2015-07-07A5D1723-15AND
2015-07-07A5D1723-09A1.60 ppb
2015-07-07A5D1723-19A4.20 ppb
2015-07-07A5D1723-17A1.30 ppb
2015-07-07A5D1723-11A2.00 ppb
2015-07-07A5D1723-13A1.70 ppb
2015-07-07A5D1723-03A4.30 ppb
2015-07-07A5D1723-21A3.40 ppb
2015-07-07A5D1723-05A2.50 ppb
2015-07-07A5D1723-01A1.60 ppb
2015-07-08A5D1723-23A0.840 ppb
2015-07-215810-034-0812ND
2015-08-115810-015-0815ND
2015-09-085810-030-1045ND
2015-12-095810-036-0840ND
2016-04-195810-012-0920ND
2016-06-145810-038-0645ND
2016-07-125810-032-0630ND
2016-08-235810-014-0715ND
2017-05-095810-040-0859ND
2017-06-135810-042-0745ND