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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

City of Daly City

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

 

876

Samples

0

Samples exceeding legal limit (MCL)

579

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20131.61 ppb64ND - 7.80 ppb
20142.50 ppb1817ND - 13.0 ppb
20158.68 ppb117111ND - 17.0 ppb
20166.02 ppb410360ND - 17.0 ppb
20172.81 ppb12039ND - 15.0 ppb
20182.63 ppb10224ND - 14.0 ppb
20192.84 ppb10324ND - 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
2013-11-051311130-001BND
2013-11-051311131-001BND
2013-11-051311129-001B7.80 ppb
2013-11-051311127-001B1.40 ppb
2013-11-051311126-001A0.190 ppb
2013-11-051311128-001B0.270 ppb
2014-02-041402098-001B0.1000 ppb
2014-02-041402100-001B0.130 ppb
2014-02-041402101-001B13.0 ppb
2014-02-041402097-001B0.120 ppb
2014-02-041402096-001A0.590 ppb
2014-02-041402099-001B0.140 ppb
2014-05-071405258-001B0.0570 ppb
2014-05-071405257-001BND
2014-05-071405259-001B0.0370 ppb
2014-05-071405255-001B10.00 ppb
2014-05-071405256-001B2.20 ppb
2014-05-071405260-001A1.20 ppb
2014-08-131408519-001B0.1000 ppb
2014-08-131408518-001B0.120 ppb
2014-08-131408515-001B12.0 ppb
2014-08-131408520-001B3.40 ppb
2014-08-131408517-001B0.110 ppb
2014-08-131408516-001A1.70 ppb
2015-03-181610-011-094517.0 ppb
2015-03-181610-013-08555.60 ppb
2015-03-181610-018-102014.0 ppb
2015-03-191610-004-085517.0 ppb
2015-05-131610-004-101017.0 ppb
2015-05-131610-011-084017.0 ppb
2015-05-131610-018-090014.0 ppb
2015-08-041610-010-1120ND
2015-08-251610-004-083017.0 ppb
2015-08-251610-010-09454.70 ppb
2015-08-251610-011-091017.0 ppb
2015-09-171610-015-0840ND
2015-09-171610-016-0640ND
2015-09-171610-017-07459.30 ppb
2015-09-231610-015-09501.70 ppb
2015-09-231610-016-0700ND
2015-09-231610-017-09009.30 ppb
2015-12-011610-010-072011.0 ppb
2015-12-011610-011-070515.0 ppb
2015-12-011610-017-07458.10 ppb
2015-12-021610-010-075011.0 ppb
2015-12-021610-011-072516.0 ppb
2015-12-021610-015-09301.40 ppb
2015-12-021610-016-0650ND
2015-12-021610-017-09557.60 ppb
2015-12-031610-010-080511.0 ppb
2015-12-031610-011-075517.0 ppb
2015-12-031610-017-08278.30 ppb
2015-12-041610-010-08059.40 ppb
2015-12-041610-011-075015.0 ppb
2015-12-041610-017-08258.20 ppb
2015-12-051610-010-084511.0 ppb
2015-12-051610-011-083017.0 ppb
2015-12-051610-017-09107.90 ppb
2015-12-061610-010-100011.0 ppb
2015-12-061610-011-094517.0 ppb
2015-12-061610-017-10208.10 ppb
2015-12-071610-010-082511.0 ppb
2015-12-071610-011-075516.0 ppb
2015-12-071610-017-09058.50 ppb
2015-12-081610-010-075012.0 ppb
2015-12-081610-011-072517.0 ppb
2015-12-081610-013-09455.70 ppb
2015-12-081610-017-08408.20 ppb
2015-12-091610-010-084011.0 ppb
2015-12-091610-011-083016.0 ppb
2015-12-091610-013-074515.0 ppb
2015-12-091610-013-10455.40 ppb
2015-12-091610-017-09157.60 ppb
2015-12-101610-010-092010.00 ppb
2015-12-101610-011-091015.0 ppb
2015-12-101610-013-07505.40 ppb
2015-12-101610-017-09307.00 ppb
2015-12-111610-010-08109.70 ppb
2015-12-111610-011-074516.0 ppb
2015-12-111610-017-08257.00 ppb
2015-12-121610-010-085510.00 ppb
2015-12-121610-011-085015.0 ppb
2015-12-121610-017-09307.50 ppb
2015-12-131610-010-073010.00 ppb
2015-12-131610-011-072015.0 ppb
2015-12-131610-017-07457.10 ppb
2015-12-141610-010-074511.0 ppb
2015-12-141610-011-073515.0 ppb
2015-12-141610-017-08107.70 ppb
2015-12-151610-010-081510.00 ppb
2015-12-151610-011-080015.0 ppb
2015-12-151610-017-08557.40 ppb
2015-12-161610-010-083010.00 ppb
2015-12-161610-011-081516.0 ppb
2015-12-161610-015-10451.30 ppb
2015-12-161610-016-0815ND
2015-12-161610-017-08407.40 ppb
2015-12-171610-013-14454.90 ppb
2015-12-171610-016-14454.90 ppb
2015-12-171610-017-08007.10 ppb
2015-12-181610-010-080011.0 ppb
2015-12-181610-011-074516.0 ppb
2015-12-181610-017-08457.40 ppb
2015-12-191610-010-081011.0 ppb
2015-12-191610-011-080016.0 ppb
2015-12-191610-017-09307.40 ppb
2015-12-201610-017-13507.70 ppb
2015-12-211610-013-07105.10 ppb
2015-12-211610-016-07251.90 ppb
2015-12-211610-017-09007.90 ppb
2015-12-221610-013-07505.20 ppb
2015-12-221610-016-07552.40 ppb
2015-12-221610-017-09407.80 ppb
2015-12-231610-013-07005.40 ppb
2015-12-231610-016-06551.70 ppb
2015-12-231610-017-07557.60 ppb
2015-12-241644-013-06555.80 ppb
2015-12-241644-016-07201.60 ppb
2015-12-241644-017-08358.30 ppb
2015-12-251644-013-07406.30 ppb
2015-12-251644-016-07452.00 ppb
2015-12-251644-017-09158.60 ppb
2015-12-261644-013-07105.90 ppb
2015-12-261644-016-07252.00 ppb
2015-12-261644-017-08308.30 ppb
2015-12-271644-013-08005.90 ppb
2015-12-271644-016-08202.60 ppb
2015-12-271644-017-09358.20 ppb
2015-12-281644-013-06305.60 ppb
2015-12-281644-016-06501.90 ppb
2015-12-281644-017-07008.30 ppb
2015-12-291644-013-06505.90 ppb
2015-12-291644-015-09203.00 ppb
2015-12-291644-016-07103.40 ppb
2015-12-291644-017-08408.90 ppb
2015-12-301644-013-07156.30 ppb
2015-12-301644-016-07402.50 ppb
2015-12-301644-017-09309.30 ppb
2015-12-311644-013-06555.90 ppb
2015-12-311644-016-07051.80 ppb
2015-12-311644-017-08208.70 ppb
2016-01-011644-013-08055.90 ppb
2016-01-011644-016-08302.30 ppb
2016-01-011644-017-09258.40 ppb
2016-01-021644-013-07155.80 ppb
2016-01-021644-016-07303.70 ppb
2016-01-021644-017-08208.60 ppb
2016-01-031644-013-07055.90 ppb
2016-01-041644-013-06306.00 ppb
2016-01-041644-016-06254.60 ppb
2016-01-041644-017-07358.90 ppb
2016-01-051644-013-07005.40 ppb
2016-01-051644-016-07101.70 ppb
2016-01-051644-017-09157.80 ppb
2016-01-061644-010-081511.0 ppb
2016-01-061644-011-075516.0 ppb
2016-01-061644-013-07155.50 ppb
2016-01-061644-016-07351.50 ppb
2016-01-061644-017-08408.00 ppb
2016-01-071644-013-06405.80 ppb
2016-01-071644-016-07004.40 ppb
2016-01-071644-017-08058.00 ppb
2016-01-081610-013-06505.80 ppb
2016-01-081610-016-07002.90 ppb
2016-01-081610-017-08408.70 ppb
2016-01-091610-013-07405.70 ppb
2016-01-091610-016-08003.40 ppb
2016-01-091610-017-09158.30 ppb
2016-01-101610-013-07205.60 ppb
2016-01-101610-016-07352.20 ppb
2016-01-101610-017-08408.30 ppb
2016-01-111610-013-06305.80 ppb
2016-01-111610-016-06501.80 ppb
2016-01-111610-017-08258.00 ppb
2016-01-121610-013-07005.70 ppb
2016-01-121610-016-07152.40 ppb
2016-01-121610-017-09008.30 ppb
2016-01-131610-013-06355.50 ppb
2016-01-131610-015-10002.30 ppb
2016-01-131610-016-07004.40 ppb
2016-01-131610-017-09008.00 ppb
2016-01-141610-013-07501.90 ppb
2016-01-141610-016-08105.60 ppb
2016-01-141610-017-09258.10 ppb
2016-01-151610-013-06355.60 ppb
2016-01-151610-016-07002.40 ppb
2016-01-151610-017-07458.00 ppb
2016-01-161610-013-08005.70 ppb
2016-01-161610-016-08202.90 ppb
2016-01-161610-017-10009.20 ppb
2016-01-171610-013-08055.80 ppb
2016-01-171610-016-08102.00 ppb
2016-01-171610-017-08209.00 ppb
2016-01-181610-013-07005.40 ppb
2016-01-181610-016-07051.70 ppb
2016-01-181610-017-08458.50 ppb
2016-01-191610-013-06405.60 ppb
2016-01-191610-016-06451.70 ppb
2016-01-191610-017-09158.30 ppb
2016-01-201610-004-103017.0 ppb
2016-01-201610-004-104017.0 ppb
2016-01-201610-013-10005.60 ppb
2016-01-201610-016-10005.60 ppb
2016-01-201610-017-08008.00 ppb
2016-01-211610-013-08305.50 ppb
2016-01-211610-016-08302.30 ppb
2016-01-211610-017-10008.00 ppb
2016-01-221610-013-06355.40 ppb
2016-01-221610-016-06402.20 ppb
2016-01-221610-017-08558.10 ppb
2016-01-231610-013-06355.60 ppb
2016-01-231610-016-07102.30 ppb
2016-01-231610-017-08107.80 ppb
2016-01-241610-013-06455.40 ppb
2016-01-241610-016-07002.20 ppb
2016-01-241610-017-08057.90 ppb
2016-01-251610-013-06305.40 ppb
2016-01-251610-016-08301.60 ppb
2016-01-251610-017-08308.20 ppb
2016-01-261610-013-08305.40 ppb
2016-01-261610-016-08302.50 ppb
2016-01-261610-017-07308.40 ppb
2016-01-271610-013-07155.60 ppb
2016-01-271610-015-10353.00 ppb
2016-01-271610-016-07452.20 ppb
2016-01-271610-017-09407.80 ppb
2016-01-281610-013-08005.70 ppb
2016-01-281610-016-08001.70 ppb
2016-01-281610-017-14356.70 ppb
2016-01-291610-013-08305.70 ppb
2016-01-291610-016-08304.00 ppb
2016-01-291610-017-09306.30 ppb
2016-01-301610-013-08005.80 ppb
2016-01-301610-016-08004.50 ppb
2016-01-301610-017-09006.20 ppb
2016-01-311610-013-09305.50 ppb
2016-01-311610-016-09303.10 ppb
2016-01-311610-017-10305.90 ppb
2016-02-011610-013-07055.80 ppb
2016-02-011610-016-07153.70 ppb
2016-02-011610-017-09305.80 ppb
2016-02-021610-013-07355.40 ppb
2016-02-021610-016-07402.30 ppb
2016-02-021610-017-08556.30 ppb
2016-02-031610-010-104511.0 ppb
2016-02-031610-011-093516.0 ppb
2016-02-031610-011-095016.0 ppb
2016-02-031610-013-08005.50 ppb
2016-02-031610-013-08155.00 ppb
2016-02-031610-016-08002.00 ppb
2016-02-031610-017-10156.90 ppb
2016-02-031610-018-113013.0 ppb
2016-02-031610-018-113513.0 ppb
2016-02-041610-013-08005.50 ppb
2016-02-041610-016-08002.70 ppb
2016-02-041610-017-09006.20 ppb
2016-02-051610-013-07255.70 ppb
2016-02-051610-016-07302.50 ppb
2016-02-051610-017-10156.00 ppb
2016-02-061610-013-06405.40 ppb
2016-02-061610-016-06453.20 ppb
2016-02-061610-017-10405.80 ppb
2016-02-071610-013-09505.30 ppb
2016-02-071610-016-09503.00 ppb
2016-02-071610-017-09306.10 ppb
2016-02-081610-013-07005.70 ppb
2016-02-081610-016-07003.00 ppb
2016-02-081610-017-08306.10 ppb
2016-02-091610-013-08003.70 ppb
2016-02-091610-016-08005.00 ppb
2016-02-091610-017-09455.80 ppb
2016-02-101610-013-06355.30 ppb
2016-02-101610-015-09103.30 ppb
2016-02-101610-016-06502.20 ppb
2016-02-101610-017-08206.10 ppb
2016-02-111610-013-06355.30 ppb
2016-02-111610-016-06402.30 ppb
2016-02-111610-017-08405.50 ppb
2016-02-121610-013-08005.30 ppb
2016-02-121610-016-08001.30 ppb
2016-02-121610-017-09006.40 ppb
2016-02-131610-013-09155.30 ppb
2016-02-131610-016-09152.70 ppb
2016-02-131610-017-10306.20 ppb
2016-02-141610-013-08455.40 ppb
2016-02-141610-016-09004.00 ppb
2016-02-141610-017-10006.80 ppb
2016-02-151610-013-08155.30 ppb
2016-02-151610-016-08302.50 ppb
2016-02-151610-017-09306.20 ppb
2016-02-161610-013-06405.40 ppb
2016-02-161610-016-06452.40 ppb
2016-02-161610-017-08306.40 ppb
2016-02-171610-013-06155.40 ppb
2016-02-171610-016-06153.10 ppb
2016-02-171610-017-09006.50 ppb
2016-02-181610-013-08005.40 ppb
2016-02-181610-016-08002.80 ppb
2016-02-181610-017-09006.30 ppb
2016-02-191610-013-07155.50 ppb
2016-02-191610-016-07202.40 ppb
2016-02-191610-017-08306.60 ppb
2016-02-201610-017-08456.60 ppb
2016-02-211610-017-09406.20 ppb
2016-02-221610-017-08456.60 ppb
2016-02-231610-017-08306.10 ppb
2016-02-241610-015-08503.20 ppb
2016-02-241610-016-07151.90 ppb
2016-02-241610-017-08006.10 ppb
2016-02-251610-017-08156.90 ppb
2016-02-261610-017-07406.60 ppb
2016-02-271610-017-09406.60 ppb
2016-02-281610-017-09006.50 ppb
2016-02-291610-017-06306.30 ppb
2016-03-011610-017-08406.60 ppb
2016-03-021610-010-094511.0 ppb
2016-03-021610-011-091516.0 ppb
2016-03-021610-013-08005.20 ppb
2016-03-021610-017-10306.00 ppb
2016-03-021610-018-100014.0 ppb
2016-03-031610-017-1130ND
2016-03-041610-017-08306.50 ppb
2016-03-051610-017-12006.70 ppb
2016-03-061610-017-09207.10 ppb
2016-03-071610-017-10006.60 ppb
2016-03-081610-017-09156.50 ppb
2016-03-091610-004-082017.0 ppb
2016-03-091610-015-10402.80 ppb
2016-03-091610-016-06452.00 ppb
2016-03-091610-017-09506.10 ppb
2016-03-091610-018-093513.0 ppb
2016-03-101610-017-10505.30 ppb
2016-03-101610-018-092514.0 ppb
2016-03-121610-017-12105.90 ppb
2016-03-121610-018-120013.0 ppb
2016-03-131610-017-10005.70 ppb
2016-03-131610-018-094513.0 ppb
2016-03-141610-017-08155.90 ppb
2016-03-141610-018-080513.0 ppb
2016-03-151610-017-08105.80 ppb
2016-03-151610-018-080513.0 ppb
2016-03-161610-017-09005.30 ppb
2016-03-161610-018-081514.0 ppb
2016-03-171610-017-07355.50 ppb
2016-03-171610-018-073014.0 ppb
2016-03-181610-017-08205.40 ppb
2016-03-181610-018-080014.0 ppb
2016-03-191610-017-07255.40 ppb
2016-03-191610-018-072014.0 ppb
2016-03-201610-017-07355.20 ppb
2016-03-201610-018-072014.0 ppb
2016-03-211610-017-08205.30 ppb
2016-03-211610-018-081514.0 ppb
2016-03-221610-017-07506.00 ppb
2016-03-221610-018-074514.0 ppb
2016-03-231610-015-09002.90 ppb
2016-03-231610-016-06452.30 ppb
2016-03-231610-017-08106.00 ppb
2016-03-231610-018-075513.0 ppb
2016-03-241610-017-07505.70 ppb
2016-03-241610-018-072514.0 ppb
2016-03-251610-017-08105.50 ppb
2016-03-251610-018-074014.0 ppb
2016-03-261610-017-09155.40 ppb
2016-03-261610-018-092014.0 ppb
2016-03-271610-017-09105.40 ppb
2016-03-271610-018-090514.0 ppb
2016-03-281610-017-08155.50 ppb
2016-03-281610-018-074514.0 ppb
2016-03-291610-017-07505.70 ppb
2016-03-291610-018-074514.0 ppb
2016-03-301610-017-07305.50 ppb
2016-03-301610-018-070513.0 ppb
2016-03-311644-017-08505.80 ppb
2016-04-011644-017-08056.50 ppb
2016-04-021644-017-07006.60 ppb
2016-04-031644-017-07206.10 ppb
2016-04-041644-017-08156.40 ppb
2016-04-051610-017-09306.30 ppb
2016-04-061610-010-081511.0 ppb
2016-04-061610-013-06555.30 ppb
2016-04-061610-015-10003.50 ppb
2016-04-061610-016-07152.40 ppb
2016-04-061610-017-09156.00 ppb
2016-04-061610-018-085014.0 ppb
2016-04-071610-017-10206.10 ppb
2016-04-081610-017-09305.70 ppb
2016-04-091610-017-09305.60 ppb
2016-04-101610-017-09105.90 ppb
2016-04-111610-017-09156.00 ppb
2016-04-131610-017-08004.70 ppb
2016-04-141610-017-09304.00 ppb
2016-04-151610-017-07405.10 ppb
2016-04-161610-017-09504.50 ppb
2016-04-171610-017-08153.80 ppb
2016-04-181610-017-08304.30 ppb
2016-04-191610-017-09004.30 ppb
2016-04-201610-011-083017.0 ppb
2016-04-201610-015-10251.80 ppb
2016-04-201610-016-07152.40 ppb
2016-04-201610-017-08254.10 ppb
2016-04-211610-017-08204.40 ppb
2016-04-221610-017-09303.70 ppb
2016-04-231610-017-10453.50 ppb
2016-04-241610-017-09303.90 ppb
2016-04-251610-017-06354.20 ppb
2016-04-261610-017-07254.30 ppb
2016-04-271610-017-11304.00 ppb
2016-04-281610-017-09003.60 ppb
2016-04-291610-017-08454.20 ppb
2016-04-301610-017-00003.90 ppb
2016-05-011610-017-09303.70 ppb
2016-05-021610-017-07453.40 ppb
2016-05-031610-017-09153.50 ppb
2016-05-041610-010-083011.0 ppb
2016-05-041610-011-080516.0 ppb
2016-05-041610-013-06405.40 ppb
2016-05-041610-015-09401.80 ppb
2016-05-041610-016-0700ND
2016-05-041610-017-09053.80 ppb
2016-05-041610-018-084514.0 ppb
2016-05-051610-017-08553.90 ppb
2016-05-061610-017-08503.40 ppb
2016-05-071610-017-09303.30 ppb
2016-05-081610-017-09003.60 ppb
2016-05-091610-017-07553.70 ppb
2016-05-101610-017-07153.40 ppb
2016-05-111610-017-09003.00 ppb
2016-05-121610-017-09153.10 ppb
2016-05-131610-017-08054.10 ppb
2016-05-141610-017-08403.80 ppb
2016-05-151610-017-08103.80 ppb
2016-05-161610-017-07303.20 ppb
2016-05-171610-017-09453.10 ppb
2016-05-181610-015-0840ND
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