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EWG's Tap Water Database — 2019 UPDATE

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Arsenic

City of Chino Hills

Arsenic is a potent carcinogen and common contaminant in drinking water. Arsenic causes thousands of cases of cancer each year in the U.S. Click here to read more about arsenic.

MORE ABOUT THIS CONTAMINANT

 

462

Samples

7

Samples exceeding legal limit (MCL)

193

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.896 ppb8917ND - 16.0 ppb
20131.57 ppb11150ND - 10.00 ppb
20141.90 ppb13848ND - 11.0 ppb
20152.43 ppb6431ND - 12.0 ppb
20161.20 ppb125ND - 4.00 ppb
20175.83 ppb4842ND - 12.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.004 ppb

The EWG Health Guideline of 0.004 ppb for arsenic 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.

EPA Maximum Contaminant
Level (MCL) 10 ppb

The legal limit for arsenic, established in 2001, was based on costs for arsenic removal, as calculated at the time that the standard was set. This limit does not fully protect against the risk of cancer due to arsenic exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2012-05-174790-001-1000ND
2012-05-174790-009-1050ND
2012-05-174790-010-1035ND
2012-05-174790-022-1020ND
2012-05-224790-001-0730ND
2012-05-224790-009-0820ND
2012-05-224790-010-0818ND
2012-05-224790-022-0845ND
2012-05-294790-001-07002.50 ppb
2012-05-294790-009-0755ND
2012-05-294790-010-0745ND
2012-05-294790-022-08153.30 ppb
2012-06-054790-001-0715ND
2012-06-054790-009-0800ND
2012-06-054790-010-0745ND
2012-06-054790-022-0815ND
2012-06-124790-001-0715ND
2012-06-124790-009-0755ND
2012-06-124790-010-0745ND
2012-06-124790-022-0815ND
2012-06-204790-001-0930ND
2012-06-204790-009-10302.10 ppb
2012-06-204790-010-10002.30 ppb
2012-06-204790-022-0900ND
2012-06-264790-001-0715ND
2012-06-264790-009-0755ND
2012-06-264790-010-0745ND
2012-06-264790-022-08153.00 ppb
2012-07-034790-001-0700ND
2012-07-034790-009-0715ND
2012-07-034790-010-0725ND
2012-07-034790-022-09404.40 ppb
2012-07-104790-001-0715ND
2012-07-104790-009-0730ND
2012-07-104790-010-0740ND
2012-07-104790-022-1000ND
2012-07-184790-001-0735ND
2012-07-184790-009-0810ND
2012-07-184790-010-0800ND
2012-07-184790-022-0820ND
2012-07-254790-001-0700ND
2012-07-254790-009-0745ND
2012-07-254790-022-08002.10 ppb
2012-08-014790-001-0845ND
2012-08-014790-009-0915ND
2012-08-014790-022-09303.30 ppb
2012-08-084790-001-0715ND
2012-08-084790-009-0730ND
2012-08-084790-010-0740ND
2012-08-084790-022-0900ND
2012-08-164790-001-0700ND
2012-08-164790-009-0730ND
2012-08-164790-022-0800ND
2012-08-224790-001-0715ND
2012-08-224790-009-0745ND
2012-08-224790-022-0800ND
2012-08-294790-001-0730ND
2012-08-294790-009-0800ND
2012-08-294790-022-08152.00 ppb
2012-09-054790-001-0715ND
2012-09-054790-009-0745ND
2012-09-054790-022-0800ND
2012-09-134790-001-0900ND
2012-09-134790-009-0913ND
2012-09-134790-010-0930ND
2012-09-134790-022-09507.80 ppb
2012-09-194790-001-0715ND
2012-09-194790-022-08105.50 ppb
2012-09-264790-001-0745ND
2012-09-264790-022-08155.50 ppb
2012-10-034790-001-0730ND
2012-10-034790-022-0845ND
2012-10-084790-001-1300ND
2012-10-084790-022-14002.80 ppb
2012-10-174790-001-0840ND
2012-10-174790-022-082516.0 ppb
2012-10-244790-001-0830ND
2012-10-244790-022-08159.00 ppb
2012-12-124790-001-1115ND
2012-12-124790-009-1200ND
2012-12-124790-010-1145ND
2012-12-194790-001-0725ND
2012-12-194790-009-0755ND
2012-12-194790-010-0805ND
2012-12-194790-022-0815ND
2012-12-274790-001-07153.50 ppb
2012-12-274790-009-0810ND
2012-12-274790-010-0800ND
2012-12-274790-022-08454.60 ppb
2013-01-024790-001-0745ND
2013-01-024790-009-0815ND
2013-01-024790-010-0810ND
2013-01-024790-022-08203.20 ppb
2013-01-094790-001-08403.20 ppb
2013-01-094790-009-09152.80 ppb
2013-01-094790-010-09252.50 ppb
2013-01-094790-022-09459.60 ppb
2013-01-164790-001-0700ND
2013-01-164790-009-0740ND
2013-01-164790-010-0730ND
2013-01-164790-022-08003.80 ppb
2013-01-234790-001-0730ND
2013-01-234790-009-0805ND
2013-01-234790-010-0755ND
2013-01-234790-022-08155.70 ppb
2013-01-304790-001-0740ND
2013-01-304790-009-0810ND
2013-01-304790-010-0800ND
2013-01-304790-022-08204.00 ppb
2013-02-064790-001-0830ND
2013-02-064790-009-0855ND
2013-02-064790-010-0905ND
2013-02-064790-022-09205.50 ppb
2013-02-134790-001-0715ND
2013-02-134790-009-0745ND
2013-02-134790-010-0735ND
2013-02-134790-022-08005.70 ppb
2013-02-204790-001-07002.50 ppb
2013-02-204790-009-07452.10 ppb
2013-02-204790-010-07302.30 ppb
2013-02-204790-022-08004.30 ppb
2013-02-274790-001-09552.50 ppb
2013-02-274790-009-1030ND
2013-02-274790-010-1020ND
2013-02-274790-022-10455.70 ppb
2013-03-064790-001-0830ND
2013-03-064790-022-09003.70 ppb
2013-03-134790-001-0700ND
2013-03-134790-009-0740ND
2013-03-134790-010-0730ND
2013-03-134790-022-08006.20 ppb
2013-03-204790-001-0730ND
2013-03-204790-009-0800ND
2013-03-204790-010-0810ND
2013-03-204790-022-08302.20 ppb
2013-03-284790-001-0715ND
2013-03-284790-009-0800ND
2013-03-284790-010-07452.00 ppb
2013-03-284790-022-08152.30 ppb
2013-04-034790-001-0810ND
2013-04-034790-009-0830ND
2013-04-034790-010-0835ND
2013-04-034790-022-09503.20 ppb
2013-04-104790-001-0700ND
2013-04-104790-009-0740ND
2013-04-104790-010-0730ND
2013-04-104790-022-08003.10 ppb
2013-04-174790-001-0830ND
2013-04-174790-009-0800ND
2013-04-174790-022-08452.60 ppb
2013-04-244790-001-07302.00 ppb
2013-04-244790-009-0755ND
2013-04-244790-022-08153.10 ppb
2013-05-014790-001-0830ND
2013-05-014790-009-09002.50 ppb
2013-05-014790-022-09152.60 ppb
2013-05-084790-001-0700ND
2013-05-084790-009-0715ND
2013-05-084790-022-09505.50 ppb
2013-05-144790-001-0745ND
2013-05-144790-009-08002.00 ppb
2013-05-144790-022-10002.80 ppb
2013-05-224790-001-07152.00 ppb
2013-05-224790-009-0800ND
2013-05-224790-022-08154.20 ppb
2013-05-294790-001-0730ND
2013-05-294790-009-0800ND
2013-05-294790-022-08303.00 ppb
2013-06-054790-001-0800ND
2013-06-054790-009-0830ND
2013-06-054790-022-08452.60 ppb
2013-06-124790-001-0715ND
2013-06-124790-009-0745ND
2013-06-124790-022-08002.50 ppb
2013-06-194790-001-07152.00 ppb
2013-06-194790-009-0745ND
2013-06-194790-022-08002.60 ppb
2013-06-264790-001-0700ND
2013-06-264790-009-07302.20 ppb
2013-06-264790-022-08002.40 ppb
2013-07-034790-001-0730ND
2013-07-034790-009-0800ND
2013-07-034790-022-10452.50 ppb
2013-07-104790-001-0830ND
2013-07-104790-009-0845ND
2013-07-104790-022-09452.40 ppb
2013-07-174790-001-07302.20 ppb
2013-07-174790-009-08002.20 ppb
2013-07-174790-022-08153.20 ppb
2013-07-244790-001-0700ND
2013-07-244790-009-0715ND
2013-07-244790-022-10152.70 ppb
2013-07-314790-001-0700ND
2013-07-314790-022-08004.90 ppb
2013-08-074790-001-08302.10 ppb
2013-08-074790-022-093010.00 ppb
2013-08-134790-001-0715ND
2013-08-134790-022-0815ND
2013-08-204790-001-0745ND
2013-08-204790-022-09007.30 ppb
2014-01-234790-001-11002.40 ppb
2014-01-234790-001-1300ND
2014-01-234790-022-12453.20 ppb
2014-01-294790-001-0745ND
2014-01-294790-022-08303.30 ppb
2014-02-054790-001-0730ND
2014-02-054790-022-08103.60 ppb
2014-02-124790-001-0915ND
2014-02-124790-022-09404.50 ppb
2014-02-194790-001-0845ND
2014-02-194790-022-08257.60 ppb
2014-02-264790-001-0815ND
2014-02-264790-022-08308.30 ppb
2014-03-114790-001-1240ND
2014-03-114790-022-11005.00 ppb
2014-03-204790-001-1320ND
2014-03-204790-022-13003.20 ppb
2014-03-264790-001-0830ND
2014-03-264790-022-08558.60 ppb
2014-04-024790-001-1230ND
2014-04-024790-022-11308.40 ppb
2014-04-034790-009-1040ND
2014-04-034790-010-1035ND
2014-04-094790-001-1225ND
2014-04-094790-009-1200ND
2014-04-094790-022-11108.30 ppb
2014-04-164790-001-0735ND
2014-04-164790-009-0815ND
2014-04-164790-010-0805ND
2014-04-164790-022-08305.30 ppb
2014-04-234790-001-0715ND
2014-04-234790-009-0755ND
2014-04-234790-010-0745ND
2014-04-234790-022-08204.80 ppb
2014-05-024790-001-12452.20 ppb
2014-05-024790-009-1300ND
2014-05-024790-010-1310ND
2014-05-024790-022-13205.00 ppb
2014-05-074790-001-0845ND
2014-05-074790-009-0920ND
2014-05-074790-010-0915ND
2014-05-074790-022-09405.20 ppb
2014-05-144790-001-0745ND
2014-05-144790-009-0820ND
2014-05-144790-010-0810ND
2014-05-144790-022-08354.60 ppb
2014-05-214790-001-12252.40 ppb
2014-05-214790-009-12002.50 ppb
2014-05-214790-010-11453.20 ppb
2014-05-214790-022-12155.80 ppb
2014-05-284790-001-0730ND
2014-05-284790-009-0820ND
2014-05-284790-010-08152.50 ppb
2014-05-284790-022-08302.10 ppb
2014-06-044790-001-0830ND
2014-06-044790-009-0905ND
2014-06-044790-010-0900ND
2014-06-044790-022-09155.90 ppb
2014-06-114790-001-0730ND
2014-06-114790-009-0815ND
2014-06-114790-010-0805ND
2014-06-114790-022-08305.70 ppb
2014-06-184790-001-0820ND
2014-06-184790-009-0840ND
2014-06-184790-010-0850ND
2014-06-184790-022-09452.60 ppb
2014-06-254790-001-0725ND
2014-06-254790-009-0810ND
2014-06-254790-010-0800ND
2014-06-254790-022-08306.40 ppb
2014-07-024790-001-1005ND
2014-07-024790-009-0947ND
2014-07-024790-010-09402.80 ppb
2014-07-024790-022-08556.70 ppb
2014-07-094790-001-0715ND
2014-07-094790-009-0750ND
2014-07-094790-010-0740ND
2014-07-094790-022-08307.20 ppb
2014-07-184790-001-1015ND
2014-07-184790-009-1030ND
2014-07-184790-010-1035ND
2014-07-184790-022-11205.30 ppb
2014-07-234790-001-0715ND
2014-07-234790-009-0740ND
2014-07-234790-010-0730ND
2014-07-234790-022-10305.70 ppb
2014-07-304790-001-0710ND
2014-07-304790-009-0735ND
2014-07-304790-010-0745ND
2014-07-304790-022-10306.40 ppb
2014-08-064790-001-0720ND
2014-08-064790-009-0735ND
2014-08-064790-010-0745ND
2014-08-064790-022-07454.40 ppb
2014-08-134790-001-0700ND
2014-08-134790-009-0730ND
2014-08-134790-010-0720ND
2014-08-134790-022-09006.40 ppb
2014-08-204790-001-0700ND
2014-08-204790-010-0720ND
2014-08-204790-022-10407.20 ppb
2014-08-274790-001-0710ND
2014-08-274790-010-0725ND
2014-08-274790-022-10308.70 ppb
2014-09-034790-001-07102.50 ppb
2014-09-034790-010-0720ND
2014-09-034790-022-104011.0 ppb
2014-09-104790-001-0745ND
2014-09-104790-010-0800ND
2014-09-104790-022-10207.20 ppb
2014-09-174790-001-0800ND
2014-09-254790-001-0700ND
2014-09-254790-010-0720ND
2014-09-254790-022-10408.60 ppb
2014-10-014790-001-0740ND
2014-10-014790-010-0800ND
2014-10-014790-022-10009.00 ppb
2014-10-024790-009-1330ND
2014-10-084790-001-0705ND
2014-10-084790-009-0720ND
2014-10-084790-010-0720ND
2014-10-084790-022-10458.30 ppb
2014-10-154790-001-0700ND
2014-10-154790-009-0725ND
2014-10-154790-010-0720ND
2014-10-154790-022-104010.00 ppb
2014-11-194790-001-0720ND
2014-11-194790-009-0740ND
2014-11-194790-010-0745ND
2014-11-194790-022-10007.80 ppb
2014-12-044790-001-0725ND
2014-12-044790-009-0755ND
2014-12-044790-010-0750ND
2014-12-044790-022-10152.30 ppb
2014-12-154790-001-0735ND
2014-12-154790-009-0755ND
2014-12-154790-010-0745ND
2014-12-154790-022-10302.10 ppb
2015-03-124790-001-0715ND
2015-03-124790-009-0740ND
2015-03-124790-010-0730ND
2015-03-124790-022-10002.50 ppb
2015-03-184790-001-0815ND
2015-03-184790-009-0946ND
2015-03-184790-010-10002.80 ppb
2015-03-184790-022-10152.40 ppb
2015-03-254790-001-0800ND
2015-04-014790-001-08302.10 ppb
2015-04-014790-009-0900ND
2015-04-014790-010-0845ND
2015-04-014790-022-10404.20 ppb
2015-04-084790-001-0750ND
2015-04-084790-009-0815ND
2015-04-084790-010-0806ND
2015-04-084790-022-0955ND
2015-04-154790-001-0751ND
2015-04-154790-009-0815ND
2015-04-154790-010-0808ND
2015-04-154790-022-1045ND
2015-04-224790-001-0753ND
2015-04-224790-009-0840ND
2015-04-224790-010-0831ND
2015-04-224790-022-1115ND
2015-04-294790-001-0725ND
2015-04-294790-009-0750ND
2015-04-294790-010-0746ND
2015-04-294790-022-08265.00 ppb
2015-05-064790-022-08005.60 ppb
2015-05-134790-022-09283.60 ppb
2015-05-214790-022-08255.40 ppb
2015-05-274790-022-09503.30 ppb
2015-06-034790-022-11003.60 ppb
2015-06-114790-022-10423.00 ppb
2015-06-174790-022-09553.90 ppb
2015-06-244790-022-10204.10 ppb
2015-07-014790-022-07256.80 ppb
2015-07-084790-022-10454.90 ppb
2015-07-154790-001-07202.40 ppb
2015-07-154790-009-0804ND
2015-07-154790-010-0752ND
2015-07-154790-022-10526.60 ppb
2015-07-234790-022-1031ND
2015-07-284790-022-10032.20 ppb
2015-08-044790-001-0733ND
2015-08-044790-009-0754ND
2015-08-044790-010-0747ND
2015-08-044790-022-09172.70 ppb
2015-08-124790-022-10002.50 ppb
2015-08-194790-022-10003.10 ppb
2015-08-264790-022-092812.0 ppb
2015-09-014790-022-1036ND
2015-09-234790-022-10146.60 ppb
2015-09-304790-022-104012.0 ppb
2015-10-074790-022-08365.60 ppb
2015-10-144790-022-11309.10 ppb
2015-10-214790-001-1137ND
2015-10-214790-009-1053ND
2015-10-214790-010-1030ND
2015-10-214790-022-082711.0 ppb
2015-10-284790-022-10106.60 ppb
2015-11-044790-022-11025.80 ppb
2015-11-104790-022-08354.40 ppb
2016-03-034790-024-1030ND
2016-04-264790-001-1045ND
2016-04-264790-009-1115ND
2016-04-264790-010-1100ND
2016-09-219588-001-1050ND
2016-11-169588-001-10302.00 ppb
2016-11-169588-009-1105ND
2016-11-169588-010-1115ND
2016-11-169588-022-11302.50 ppb
2016-11-239588-022-10354.00 ppb
2016-12-099588-022-10152.90 ppb
2016-12-139588-022-08103.00 ppb
2017-01-189588-022-08002.70 ppb
2017-02-029588-022-11163.00 ppb
2017-02-099588-022-11365.00 ppb
2017-02-159588-022-11013.50 ppb
2017-02-169588-001-1010ND
2017-02-229588-022-08042.30 ppb
2017-03-084790-022-10183.70 ppb
2017-04-114790-001-08152.70 ppb
2017-04-114790-022-09055.50 ppb
2017-04-189588-022-09535.00 ppb
2017-04-199588-009-1030ND
2017-04-199588-010-0945ND
2017-04-254790-022-1048ND
2017-05-024790-022-08215.90 ppb
2017-05-094790-022-10505.90 ppb
2017-05-164790-022-11437.10 ppb
2017-05-234790-022-07305.50 ppb
2017-05-309588-022-08106.90 ppb
2017-06-064790-022-07506.80 ppb
2017-06-134790-022-09466.20 ppb
2017-06-204790-022-07554.60 ppb
2017-06-274790-022-11137.90 ppb
2017-07-034790-022-10078.80 ppb
2017-07-114790-022-08207.50 ppb
2017-07-189588-022-11079.20 ppb
2017-08-084790-022-10056.20 ppb
2017-08-164790-022-11108.10 ppb
2017-08-224790-022-10379.30 ppb
2017-08-299588-022-08168.80 ppb
2017-09-054790-022-07586.70 ppb
2017-09-124790-022-08407.90 ppb
2017-09-139588-024-12002.00 ppb
2017-09-194790-022-10009.40 ppb
2017-09-269588-022-082012.0 ppb
2017-10-049588-022-10456.20 ppb
2017-10-114790-001-0735ND
2017-10-114790-010-0904ND
2017-10-114790-022-09237.70 ppb
2017-10-174790-022-10437.70 ppb
2017-10-259588-022-12305.00 ppb
2017-11-029588-022-095012.0 ppb
2017-11-089588-022-10307.40 ppb
2017-11-144790-022-08404.10 ppb
2017-11-204790-022-08136.50 ppb
2017-11-289588-022-10489.90 ppb
2017-12-069588-022-09079.40 ppb
2017-12-199588-022-08038.70 ppb
2017-12-264790-022-10159.10 ppb