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EWG's Tap Water Database — 2019 UPDATE

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Arsenic

Monterey Park Water Department

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.

 

409

Samples

0

Samples exceeding legal limit (MCL)

126

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.288 ppb637ND - 5.30 ppb
20130.759 ppb6319ND - 4.80 ppb
20140.746 ppb5819ND - 5.40 ppb
20151.66 ppb6430ND - 4.90 ppb
20160.610 ppb6916ND - 4.70 ppb
20171.01 ppb9235ND - 4.00 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
2012-01-043761-068-1130ND
2012-01-113761-068-0825ND
2012-01-113761-068-1240ND
2012-01-173761-068-0930ND
2012-01-243761-068-0910ND
2012-01-303761-068-1010ND
2012-02-063761-068-0757ND
2012-02-073761-068-0930ND
2012-02-143761-068-0920ND
2012-02-213761-068-0925ND
2012-02-293761-068-0910ND
2012-03-063761-068-0850ND
2012-03-133761-068-0905ND
2012-03-203761-068-0900ND
2012-03-273761-068-0735ND
2012-04-033761-068-1130ND
2012-04-043761-068-11401.50 ppb
2012-04-103761-068-0905ND
2012-04-173761-068-0900ND
2012-04-243761-068-0950ND
2012-05-023761-068-1035ND
2012-05-023761-068-1039ND
2012-05-083761-068-0850ND
2012-05-163761-068-1010ND
2012-05-223761-068-0955ND
2012-05-303761-068-0940ND
2012-06-053761-068-0830ND
2012-06-053761-068-1210ND
2012-06-123761-068-1115ND
2012-06-193761-068-1010ND
2012-06-263761-068-08450.960 ppb
2012-07-033761-068-1045ND
2012-07-103761-068-0915ND
2012-07-103761-068-1005ND
2012-07-173761-068-0930ND
2012-07-243761-068-0735ND
2012-08-023761-068-1020ND
2012-08-033761-068-09454.30 ppb
2012-08-073761-068-1045ND
2012-08-143761-068-1005ND
2012-08-213761-068-0855ND
2012-08-283761-068-0900ND
2012-09-043761-068-1310ND
2012-09-043761-068-1315ND
2012-09-113761-068-0840ND
2012-09-183761-068-1215ND
2012-09-253761-068-0900ND
2012-10-033761-068-10455.30 ppb
2012-10-083761-068-10102.00 ppb
2012-10-083761-068-14302.10 ppb
2012-10-163761-068-1413ND
2012-10-233761-068-0835ND
2012-10-293761-068-0905ND
2012-11-053761-068-0750ND
2012-11-053761-068-08052.00 ppb
2012-11-143761-068-1310ND
2012-11-203761-068-0730ND
2012-11-273761-068-0910ND
2012-12-043761-068-0900ND
2012-12-043761-068-0907ND
2012-12-113761-068-0930ND
2012-12-193761-068-0945ND
2012-12-263761-068-0000ND
2013-01-023761-068-1030ND
2013-01-083761-068-0930ND
2013-01-093761-068-11052.40 ppb
2013-01-153761-068-1100ND
2013-01-233761-068-0840ND
2013-01-293761-068-0910ND
2013-02-053761-068-09593.10 ppb
2013-02-053761-068-12152.90 ppb
2013-02-123761-068-1020ND
2013-02-193761-068-1100ND
2013-02-263761-068-1035ND
2013-03-053761-068-1030ND
2013-03-063761-068-00002.40 ppb
2013-03-123761-068-1025ND
2013-03-193761-068-0830ND
2013-03-263761-068-1120ND
2013-04-023761-068-06582.10 ppb
2013-04-023761-068-07112.10 ppb
2013-04-093761-068-0945ND
2013-04-163761-068-0945ND
2013-04-233761-068-1300ND
2013-04-293761-068-0825ND
2013-05-063761-068-1040ND
2013-05-063761-068-1210ND
2013-05-133761-068-0740ND
2013-05-213761-068-0000ND
2013-06-043761-068-0945ND
2013-06-043761-068-1410ND
2013-06-113761-068-14152.10 ppb
2013-06-173761-068-08402.80 ppb
2013-06-253761-068-1045ND
2013-07-023761-068-08552.10 ppb
2013-07-083761-068-08302.30 ppb
2013-07-093761-068-08502.20 ppb
2013-07-153761-068-10253.10 ppb
2013-07-233761-068-07372.80 ppb
2013-07-293761-068-1245ND
2013-08-063761-068-0920ND
2013-08-063761-068-09302.00 ppb
2013-08-203761-068-0825ND
2013-08-273761-068-1115ND
2013-09-033761-068-09352.30 ppb
2013-09-103761-068-1030ND
2013-09-103761-068-1150ND
2013-09-173761-068-0645ND
2013-09-243761-068-1055ND
2013-10-013761-068-07002.50 ppb
2013-10-023761-068-07104.80 ppb
2013-10-083761-068-08402.10 ppb
2013-10-153761-068-1120ND
2013-10-223761-068-0830ND
2013-10-293761-068-0820ND
2013-11-053761-068-0805ND
2013-11-053761-068-0808ND
2013-11-123761-068-0710ND
2013-11-193761-068-08351.70 ppb
2013-11-253761-068-1230ND
2013-12-033761-068-0915ND
2013-12-033761-068-1130ND
2013-12-103761-068-0955ND
2013-12-173761-068-0900ND
2013-12-233761-068-0840ND
2013-12-303761-068-0935ND
2014-01-073761-068-1030ND
2014-01-143761-068-08452.50 ppb
2014-01-153761-068-07002.70 ppb
2014-01-213761-068-0825ND
2014-01-283761-068-0715ND
2014-02-033761-068-07402.10 ppb
2014-02-033761-068-12352.10 ppb
2014-02-113761-068-0845ND
2014-02-183761-068-0840ND
2014-02-253761-068-0715ND
2014-03-043761-068-0915ND
2014-03-043761-068-0920ND
2014-03-113761-068-0910ND
2014-03-183761-068-0845ND
2014-03-253761-068-0830ND
2014-04-013761-068-00005.40 ppb
2014-04-083761-068-0920ND
2014-04-083761-068-14252.20 ppb
2014-04-153761-068-07152.60 ppb
2014-04-223761-068-09202.80 ppb
2014-04-293761-068-07552.90 ppb
2014-05-063761-068-10402.20 ppb
2014-05-063761-068-13302.10 ppb
2014-05-133761-068-09452.50 ppb
2014-05-203761-068-0850ND
2014-05-283761-068-1115ND
2014-06-023761-068-08152.90 ppb
2014-06-033761-068-1015ND
2014-06-113761-068-0850ND
2014-06-163761-068-0915ND
2014-06-243761-068-08352.40 ppb
2014-07-013761-068-0815ND
2014-07-083761-068-09152.20 ppb
2014-07-083761-068-1055ND
2014-07-153761-068-0920ND
2014-07-223761-068-0833ND
2014-07-293761-068-11351.10 ppb
2014-08-053761-068-0724ND
2014-08-053761-068-0800ND
2014-08-123761-068-09500.710 ppb
2014-08-193761-068-0902ND
2014-08-263761-068-1110ND
2014-09-023761-068-0900ND
2014-09-033761-068-0910ND
2014-09-093761-068-1105ND
2014-09-163761-068-0813ND
2014-09-233761-068-1155ND
2014-09-293761-068-0905ND
2014-10-083761-068-0900ND
2014-10-143761-068-0800ND
2014-10-223761-068-0940ND
2014-11-253761-068-0832ND
2014-12-033761-068-0000ND
2014-12-033761-068-11450.880 ppb
2014-12-093761-068-1036ND
2014-12-153761-068-1120ND
2014-12-233761-068-0900ND
2014-12-303761-068-08400.970 ppb
2015-01-063761-068-0923ND
2015-01-133761-068-1135ND
2015-01-133761-068-1240ND
2015-01-203761-068-1030ND
2015-01-273761-068-1030ND
2015-02-033761-068-09452.80 ppb
2015-02-033761-068-09472.80 ppb
2015-02-103761-068-09102.10 ppb
2015-02-163761-068-11053.50 ppb
2015-02-243761-068-09053.00 ppb
2015-03-033761-068-09553.80 ppb
2015-03-103761-068-09152.80 ppb
2015-03-173761-068-09002.90 ppb
2015-03-243761-068-0905ND
2015-03-243761-068-0950ND
2015-03-313761-068-1049ND
2015-04-063761-068-0815ND
2015-04-073761-068-11552.30 ppb
2015-04-153761-068-09104.60 ppb
2015-04-213761-068-08002.50 ppb
2015-04-283761-068-10354.80 ppb
2015-05-043761-068-08103.70 ppb
2015-05-043761-068-12004.00 ppb
2015-05-113761-068-09204.00 ppb
2015-05-193761-068-08453.30 ppb
2015-05-263761-068-09364.80 ppb
2015-06-023761-068-15304.90 ppb
2015-06-033761-068-09303.80 ppb
2015-06-093761-068-08454.00 ppb
2015-06-163761-068-08053.90 ppb
2015-06-233761-068-08404.00 ppb
2015-06-303761-068-10504.00 ppb
2015-07-073761-068-10053.30 ppb
2015-07-073761-068-10283.30 ppb
2015-07-143761-068-09504.10 ppb
2015-07-213761-068-09373.50 ppb
2015-07-283761-068-09103.30 ppb
2015-08-033761-068-10423.30 ppb
2015-08-033761-068-10453.10 ppb
2015-08-113761-068-0945ND
2015-08-173761-068-0000ND
2015-08-253761-068-0840ND
2015-09-013761-068-1000ND
2015-09-013761-068-1100ND
2015-09-083761-068-0935ND
2015-09-163761-068-0856ND
2015-09-223761-068-0850ND
2015-09-293761-068-0955ND
2015-10-063761-068-1230ND
2015-10-073761-068-1210ND
2015-10-133761-068-0920ND
2015-10-203761-068-0840ND
2015-10-273761-068-0950ND
2015-11-023761-068-1010ND
2015-11-023761-068-1100ND
2015-11-103761-068-0900ND
2015-11-163761-068-0905ND
2015-11-233761-068-1230ND
2015-12-023761-068-1005ND
2015-12-023761-068-1440ND
2015-12-083761-068-0923ND
2015-12-153761-068-0850ND
2015-12-213761-068-0845ND
2015-12-283761-068-1035ND
2016-01-043761-068-1020ND
2016-01-043761-068-1150ND
2016-01-123761-068-0920ND
2016-01-193761-068-1000ND
2016-01-263761-068-09152.80 ppb
2016-02-023761-068-1310ND
2016-02-023761-068-1315ND
2016-02-093761-068-0930ND
2016-02-163761-068-0930ND
2016-02-223761-068-0920ND
2016-03-013761-068-0810ND
2016-03-023761-068-08124.70 ppb
2016-03-083761-068-0000ND
2016-03-153761-068-1020ND
2016-03-223761-068-0930ND
2016-03-293761-068-0913ND
2016-04-059590-068-1040ND
2016-04-069590-068-08502.00 ppb
2016-04-129590-068-1207ND
2016-04-129590-068-1210ND
2016-04-199590-068-0935ND
2016-04-199590-068-1155ND
2016-04-259590-068-0940ND
2016-04-259590-068-0945ND
2016-05-039590-068-10002.00 ppb
2016-05-039590-068-10302.00 ppb
2016-05-109590-068-1000ND
2016-05-109590-068-1005ND
2016-05-169590-068-1040ND
2016-05-169590-068-1230ND
2016-05-249590-068-0905ND
2016-05-249590-068-0908ND
2016-05-319590-068-1010ND
2016-07-059590-068-1130ND
2016-07-069590-068-1045ND
2016-07-119590-068-0930ND
2016-07-119590-068-1050ND
2016-07-199590-068-1035ND
2016-07-199590-068-1040ND
2016-07-269590-068-0855ND
2016-07-269590-068-1025ND
2016-08-019590-068-0840ND
2016-08-029590-068-0915ND
2016-08-099590-068-10302.60 ppb
2016-08-099590-068-11102.50 ppb
2016-08-169590-068-0940ND
2016-08-169590-068-0945ND
2016-08-239590-068-1020ND
2016-08-239590-068-1055ND
2016-10-049590-068-13003.40 ppb
2016-10-059590-068-10302.70 ppb
2016-10-109590-068-10452.90 ppb
2016-10-119590-068-08154.10 ppb
2016-10-189590-068-1025ND
2016-10-189590-068-1220ND
2016-10-259590-068-0825ND
2016-10-259590-068-0920ND
2016-11-019590-068-07402.00 ppb
2016-11-019590-068-11552.20 ppb
2016-11-099590-068-1100ND
2016-11-099590-068-1105ND
2016-11-159590-068-09402.20 ppb
2016-11-159590-068-0950ND
2016-11-229590-068-08412.00 ppb
2016-11-229590-068-08502.00 ppb
2016-12-209590-068-0945ND
2016-12-209590-068-0947ND
2016-12-289590-068-0950ND
2016-12-289590-068-0955ND
2017-01-039590-068-0825ND
2017-01-039590-068-0945ND
2017-01-109590-068-07552.20 ppb
2017-01-109590-068-10502.50 ppb
2017-01-189590-068-09552.10 ppb
2017-01-189590-068-10352.00 ppb
2017-01-249590-068-1045ND
2017-01-319590-068-1005ND
2017-01-319590-068-1010ND
2017-02-079590-068-1140ND
2017-02-089590-068-09202.60 ppb
2017-02-149590-068-09153.00 ppb
2017-02-149590-068-10053.10 ppb
2017-02-229590-068-0910ND
2017-02-229590-068-0920ND
2017-02-279590-068-1100ND
2017-02-279590-068-1110ND
2017-03-079590-068-0715ND
2017-03-079590-068-11302.40 ppb
2017-03-149590-068-0950ND
2017-03-149590-068-0955ND
2017-03-209590-068-0920ND
2017-03-209590-068-0936ND
2017-03-289590-068-1120ND
2017-03-289590-068-1122ND
2017-04-039590-068-1110ND
2017-04-049590-068-11502.80 ppb
2017-04-119590-068-1055ND
2017-04-119590-068-1245ND
2017-04-189590-068-0930ND
2017-04-189590-068-1000ND
2017-04-259590-068-1100ND
2017-04-259590-068-1105ND
2017-05-019590-068-10302.20 ppb
2017-05-089590-068-1030ND
2017-05-089590-068-1145ND
2017-05-169590-068-0820ND
2017-05-169590-068-1000ND
2017-05-229590-068-0925ND
2017-05-229590-068-1115ND
2017-05-309590-068-1010ND
2017-07-039590-068-09593.40 ppb
2017-07-039590-068-10053.50 ppb
2017-07-119590-068-09302.40 ppb
2017-07-119590-068-09402.30 ppb
2017-07-189590-068-09052.70 ppb
2017-07-259590-068-09562.60 ppb
2017-07-259590-068-10002.00 ppb
2017-08-029590-068-0900ND
2017-08-029590-068-1115ND
2017-08-079590-068-1058ND
2017-08-089590-068-08513.90 ppb
2017-08-159590-068-1020ND
2017-08-159590-068-1200ND
2017-08-229590-068-0805ND
2017-08-229590-068-0810ND
2017-08-299590-068-09253.20 ppb
2017-08-299590-068-10303.40 ppb
2017-09-059590-068-09582.00 ppb
2017-09-059590-068-10012.10 ppb
2017-09-129590-068-09102.60 ppb
2017-09-129590-068-09452.70 ppb
2017-09-209590-068-0912ND
2017-09-209590-068-0915ND
2017-09-269590-068-10003.40 ppb
2017-09-269590-068-10403.40 ppb
2017-10-029590-068-10502.70 ppb
2017-10-029590-068-10552.70 ppb
2017-10-109590-068-09102.20 ppb
2017-10-109590-068-09302.20 ppb
2017-10-179590-068-1000ND
2017-10-179590-068-1040ND
2017-10-249590-068-0830ND
2017-10-249590-068-0935ND
2017-10-319590-068-09002.20 ppb
2017-10-319590-068-09022.10 ppb
2017-11-079590-068-1120ND
2017-11-089590-068-10104.00 ppb
2017-11-149590-068-1025ND
2017-11-149590-068-1030ND
2017-11-219590-068-09052.00 ppb
2017-11-219590-068-09502.00 ppb
2017-11-299590-068-0943ND
2017-11-299590-068-0945ND
2017-12-049590-068-1020ND
2017-12-059590-068-1130ND
2017-12-119590-068-0927ND
2017-12-119590-068-0930ND
2017-12-199590-068-0945ND
2017-12-199590-068-1050ND
2017-12-279590-068-1000ND
2017-12-279590-068-1007ND