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EWG's Tap Water Database — 2021 UPDATE

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Arsenic

Chuckawalla Valley/ironwood State Prison

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

 

318

Samples

12

Samples exceeding legal limit (MCL)

59

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.96 ppb8736ND - 21.0 ppb
20150.111 ppb901ND - 10.00 ppb
20160.0730 ppb702ND - 2.76 ppb
20172.28 ppb236ND - 33.4 ppb
20182.28 ppb237ND - 34.6 ppb
20191.48 ppb257ND - 11.0 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
2014-01-224790-007-1008ND
2014-01-224790-008-081711.0 ppb
2014-01-294790-007-0951ND
2014-01-294790-008-0705ND
2014-02-054790-007-10026.50 ppb
2014-02-054790-008-0705ND
2014-02-124790-007-09363.80 ppb
2014-02-124790-008-07008.90 ppb
2014-02-194790-007-09357.10 ppb
2014-02-194790-008-0651ND
2014-02-264790-007-09435.30 ppb
2014-02-264790-008-0655ND
2014-03-054790-007-0945ND
2014-03-054790-008-0705ND
2014-03-124790-007-09403.00 ppb
2014-03-124790-008-0656ND
2014-03-194790-007-08407.40 ppb
2014-03-194790-008-07003.00 ppb
2014-03-264790-007-10116.50 ppb
2014-03-264790-008-0655ND
2014-04-024790-007-09384.90 ppb
2014-04-024790-008-0715ND
2014-04-094790-007-0925ND
2014-04-094790-008-0655ND
2014-04-164790-007-09304.30 ppb
2014-04-164790-008-0700ND
2014-04-234790-007-09282.80 ppb
2014-04-234790-008-0645ND
2014-04-304790-007-08365.90 ppb
2014-04-304790-008-0650ND
2014-05-074790-007-09453.50 ppb
2014-05-074790-008-0655ND
2014-05-144790-007-0935ND
2014-05-144790-008-0700ND
2014-05-214790-007-09563.80 ppb
2014-05-214790-008-06552.60 ppb
2014-05-284790-007-09308.70 ppb
2014-05-284790-008-06553.30 ppb
2014-06-044790-007-1003ND
2014-06-044790-008-06558.60 ppb
2014-06-114790-007-10087.80 ppb
2014-06-114790-008-06586.60 ppb
2014-06-184790-007-09363.50 ppb
2014-06-184790-008-06583.30 ppb
2014-06-254790-007-0825ND
2014-06-254790-008-06387.20 ppb
2014-07-024790-007-0955ND
2014-07-024790-008-06316.20 ppb
2014-07-094790-007-0925ND
2014-07-094790-008-065516.0 ppb
2014-07-164790-007-09407.50 ppb
2014-07-164790-008-071013.0 ppb
2014-07-234790-007-095211.0 ppb
2014-07-234790-008-0650ND
2014-07-304790-007-09403.10 ppb
2014-07-304790-008-063711.0 ppb
2014-08-064790-008-0645ND
2014-08-134790-007-10306.20 ppb
2014-08-134790-008-0855ND
2014-08-204790-007-095321.0 ppb
2014-08-204790-008-064612.0 ppb
2014-09-034790-007-094811.0 ppb
2014-09-034790-008-0730ND
2014-09-104790-007-0936ND
2014-09-104790-008-0700ND
2014-09-174790-007-0953ND
2014-09-174790-008-0655ND
2014-09-244790-007-0942ND
2014-09-244790-008-0644ND
2014-10-014790-007-1013ND
2014-10-014790-008-0732ND
2014-10-084790-007-0936ND
2014-10-084790-008-0736ND
2014-10-154790-007-1004ND
2014-10-154790-008-0816ND
2014-11-194790-007-1030ND
2014-11-194790-008-0735ND
2014-11-264790-007-1011ND
2014-11-264790-008-0745ND
2014-12-034790-007-0947ND
2014-12-034790-008-0758ND
2014-12-104790-007-1036ND
2014-12-104790-008-0830ND
2014-12-234790-007-0955ND
2014-12-234790-008-0742ND
2014-12-304790-007-0944ND
2014-12-304790-008-0738ND
2015-01-074790-007-0956ND
2015-01-074790-008-0803ND
2015-01-144790-007-0957ND
2015-01-144790-008-0800ND
2015-01-214790-007-1045ND
2015-01-214790-008-0805ND
2015-01-284790-007-0941ND
2015-01-284790-008-0730ND
2015-02-114790-007-0951ND
2015-02-114790-008-0745ND
2015-02-184790-007-1011ND
2015-02-184790-008-0733ND
2015-02-254790-007-1010ND
2015-02-254790-008-0743ND
2015-03-044790-007-1018ND
2015-03-044790-008-0805ND
2015-03-114790-007-1018ND
2015-03-114790-008-0750ND
2015-03-184790-007-0930ND
2015-03-184790-008-0737ND
2015-03-254790-007-1008ND
2015-03-254790-008-0755ND
2015-04-014790-007-1020ND
2015-04-014790-008-080510.00 ppb
2015-04-074790-007-1008ND
2015-04-074790-008-0806ND
2015-04-154790-007-0947ND
2015-04-154790-008-0742ND
2015-04-224790-007-0952ND
2015-04-224790-008-0738ND
2015-04-294790-007-1000ND
2015-04-294790-008-0752ND
2015-05-064790-007-0955ND
2015-05-064790-008-1009ND
2015-05-134790-007-1010ND
2015-05-134790-008-0804ND
2015-05-204790-007-1006ND
2015-05-204790-008-0810ND
2015-05-274790-007-1020ND
2015-05-274790-008-0830ND
2015-06-034790-007-1021ND
2015-06-034790-008-0815ND
2015-06-104790-008-0719ND
2015-06-124790-007-1300ND
2015-06-174790-007-1020ND
2015-06-174790-008-0758ND
2015-06-244790-007-1000ND
2015-06-244790-008-0755ND
2015-07-019469-007-1015ND
2015-07-019469-008-0852ND
2015-07-089469-007-0948ND
2015-07-089469-008-0800ND
2015-07-159469-007-1039ND
2015-07-159469-008-0755ND
2015-09-029469-007-1004ND
2015-09-029469-008-0800ND
2015-09-099469-007-1008ND
2015-09-099469-008-0750ND
2015-09-169469-007-1015ND
2015-09-169469-008-0758ND
2015-09-239469-007-1019ND
2015-09-239469-008-0756ND
2015-09-309469-007-0958ND
2015-09-309469-008-0745ND
2015-10-079469-007-1000ND
2015-10-079469-008-0817ND
2015-10-149469-007-1020ND
2015-10-149469-008-0806ND
2015-10-219469-007-0948ND
2015-10-219469-008-0809ND
2015-10-289469-007-1025ND
2015-10-289469-008-0800ND
2015-11-049469-007-0935ND
2015-11-049469-008-0755ND
2015-11-109469-007-1030ND
2015-11-109469-008-0745ND
2015-11-189469-007-1017ND
2015-11-189469-008-0750ND
2015-11-259469-007-0912ND
2015-11-259469-008-0727ND
2015-12-029469-007-1009ND
2015-12-029469-008-0752ND
2015-12-099469-007-0900ND
2015-12-099469-008-0755ND
2015-12-169469-007-0945ND
2015-12-169469-008-0737ND
2015-12-239469-007-0946ND
2015-12-239469-008-0810ND
2015-12-309469-007-1030ND
2015-12-309469-008-0747ND
2016-01-069469-007-1045ND
2016-01-069469-008-0812ND
2016-01-139469-007-1008ND
2016-01-139469-008-0803ND
2016-01-209469-007-1013ND
2016-01-209469-008-0750ND
2016-01-279469-007-1010ND
2016-01-279469-008-0739ND
2016-02-039469-007-1023ND
2016-02-039469-008-0804ND
2016-02-109469-007-1023ND
2016-02-109469-008-0743ND
2016-02-249469-007-1019ND
2016-02-249469-008-0757ND
2016-03-029469-007-0954ND
2016-03-029469-008-0733ND
2016-03-099469-007-1021ND
2016-03-099469-008-0735ND
2016-03-169469-007-1004ND
2016-03-169469-008-0728ND
2016-03-239469-007-1019ND
2016-03-239469-008-0734ND
2016-03-309469-007-1056ND
2016-03-309469-008-0740ND
2016-04-069469-007-1016ND
2016-04-069469-008-0751ND
2016-04-139469-007-0940ND
2016-04-139469-008-0747ND
2016-04-209469-007-1013ND
2016-04-209469-008-0737ND
2016-04-279469-007-1022ND
2016-04-279469-008-0752ND
2016-05-189469-007-0940ND
2016-05-189469-008-0735ND
2016-05-259469-007-1018ND
2016-05-259469-008-0807ND
2016-06-089469-007-1058ND
2016-06-229469-007-1010ND
2016-06-229469-008-0727ND
2016-06-299469-007-1021ND
2016-06-299469-008-0728ND
2016-07-139469-007-1030ND
2016-07-139469-008-0732ND
2016-07-209469-007-0910ND
2016-07-209469-008-0900ND
2016-07-279469-007-1000ND
2016-07-279469-008-0742ND
2016-08-039469-007-0928ND
2016-08-039469-008-0725ND
2016-08-119469-007-0833ND
2016-08-119469-008-0658ND
2016-08-179469-007-0925ND
2016-08-179469-008-0725ND
2016-08-249469-007-1010ND
2016-08-249469-008-07202.35 ppb
2016-08-319469-007-10312.76 ppb
2016-08-319469-008-0740ND
2016-09-149469-007-1035ND
2016-09-149469-008-0735ND
2016-09-219469-007-0850ND
2016-09-219469-008-0735ND
2016-09-289469-007-1040ND
2016-09-289469-008-0735ND
2016-10-059469-007-1018ND
2016-10-059469-008-0830ND
2016-11-029469-007-1000ND
2016-11-029469-008-0750ND
2016-12-079469-007-1015ND
2016-12-079469-008-0825ND
2016-12-289469-008-0852ND
2017-01-049469-007-0933ND
2017-01-049469-008-0940ND
2017-02-019469-007-0925ND
2017-02-019469-008-09364.10 ppb
2017-03-019469-007-1025ND
2017-03-019469-008-0959ND
2017-04-059469-007-0845ND
2017-04-059469-008-0628ND
2017-05-039469-007-074533.4 ppb
2017-05-039469-007-0820ND
2017-05-039469-008-0645ND
2017-06-079469-007-0820ND
2017-06-079469-008-07101.000 ppb
2017-07-059469-007-085011.1 ppb
2017-07-059469-008-0840ND
2017-08-029469-007-08001.41 ppb
2017-08-029469-008-0735ND
2017-09-069469-007-09001.50 ppb
2017-09-069469-008-0715ND
2017-10-049469-008-0715ND
2017-11-019469-008-0645ND
2017-12-069469-008-0720ND
2017-12-279469-007-1000ND
2018-01-039469-007-0915ND
2018-01-039469-008-0750ND
2018-02-079469-007-0857ND
2018-02-079469-008-08003.95 ppb
2018-03-079469-007-0750ND
2018-03-079469-008-07303.77 ppb
2018-04-049469-008-07401.06 ppb
2018-05-029469-007-0830ND
2018-05-029469-008-0815ND
2018-06-069469-007-0935ND
2018-06-069469-008-0930ND
2018-07-039469-007-0900ND
2018-07-039469-008-0845ND
2018-08-019469-007-08452.74 ppb
2018-08-019469-008-0815ND
2018-09-059469-007-070034.6 ppb
2018-09-059469-007-08153.36 ppb
2018-10-039469-007-0905ND
2018-10-039469-008-0710ND
2018-11-079469-007-0830ND
2018-11-079469-008-0810ND
2018-12-059469-007-08502.96 ppb
2018-12-059469-008-0830ND
2019-01-029469-007-0940ND
2019-01-029469-008-0910ND
2019-02-069469-007-0915ND
2019-02-069469-008-0710ND
2019-03-069469-007-09354.29 ppb
2019-03-069469-008-09009.59 ppb
2019-04-109469-007-0925ND
2019-04-109469-008-0645ND
2019-05-019469-007-09341.19 ppb
2019-05-019469-008-07121.12 ppb
2019-06-059469-007-1000ND
2019-06-059469-008-0715ND
2019-07-034790-007-094511.0 ppb
2019-07-034790-008-0740ND
2019-07-244790-007-08304.90 ppb
2019-08-074790-007-08454.90 ppb
2019-08-074790-008-0815ND
2019-09-044790-007-0900ND
2019-09-044790-008-0850ND
2019-10-024790-007-0845ND
2019-10-024790-008-0743ND
2019-11-064790-007-0800ND
2019-11-064790-008-0740ND
2019-12-044790-007-0830ND
2019-12-044790-008-0820ND