Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Arsenic

Cdcr-high Desert 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.

 

478

Samples

131

Samples exceeding legal limit (MCL)

427

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20149.44 ppb8877ND - 28.0 ppb
20158.29 ppb8567ND - 28.0 ppb
20169.80 ppb84842.00 ppb - 27.0 ppb
20179.09 ppb7666ND - 28.0 ppb
20189.64 ppb7668ND - 27.0 ppb
20199.59 ppb6965ND - 26.0 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
2014-01-025867-015-112410.00 ppb
2014-01-025867-016-11267.00 ppb
2014-01-025867-021-11206.00 ppb
2014-01-025867-022-11224.00 ppb
2014-01-025867-023-111520.0 ppb
2014-01-025867-024-11166.00 ppb
2014-02-042119-003-07543.82 ppb
2014-02-042119-004-080023.2 ppb
2014-02-042119-015-11075.83 ppb
2014-02-042119-016-11104.35 ppb
2014-02-042119-021-10592.49 ppb
2014-02-042119-022-1100ND
2014-02-042119-023-105515.7 ppb
2014-02-042119-024-10577.88 ppb
2014-02-055867-003-08558.00 ppb
2014-02-055867-004-090028.0 ppb
2014-02-055867-015-08459.00 ppb
2014-02-055867-016-08507.00 ppb
2014-02-055867-021-08375.00 ppb
2014-02-055867-022-08403.00 ppb
2014-02-055867-023-083320.0 ppb
2014-02-055867-024-08357.00 ppb
2014-03-055867-015-10478.00 ppb
2014-03-055867-016-10487.00 ppb
2014-03-055867-021-10514.00 ppb
2014-03-055867-022-10503.00 ppb
2014-03-055867-023-105519.0 ppb
2014-03-055867-024-10566.00 ppb
2014-04-025867-015-08358.00 ppb
2014-04-025867-016-08357.00 ppb
2014-04-025867-021-08306.00 ppb
2014-04-025867-022-08305.00 ppb
2014-04-025867-023-083220.0 ppb
2014-04-025867-024-08326.00 ppb
2014-05-075867-003-09137.00 ppb
2014-05-075867-004-092327.0 ppb
2014-05-075867-015-11177.00 ppb
2014-05-075867-016-11197.00 ppb
2014-05-075867-021-11115.00 ppb
2014-05-075867-022-11134.00 ppb
2014-05-075867-023-111419.0 ppb
2014-05-075867-024-11166.00 ppb
2014-06-031677-015-11026.70 ppb
2014-06-031677-016-11026.90 ppb
2014-06-031677-022-11053.30 ppb
2014-06-031677-023-110227.3 ppb
2014-06-031677-024-11026.30 ppb
2014-06-101677-004-093028.0 ppb
2014-06-101677-011-09006.90 ppb
2014-06-191677-022-093025.9 ppb
2014-07-011677-015-08514.40 ppb
2014-07-011677-016-08537.00 ppb
2014-07-011677-021-0850ND
2014-07-011677-023-085827.4 ppb
2014-07-011677-024-08556.40 ppb
2014-08-051677-004-084526.9 ppb
2014-08-051677-005-085412.9 ppb
2014-08-051677-014-1005ND
2014-08-051677-015-10105.70 ppb
2014-08-051677-016-10106.60 ppb
2014-08-051677-021-1005ND
2014-08-051677-023-100020.3 ppb
2014-08-051677-024-10006.40 ppb
2014-09-021677-013-0855ND
2014-09-021677-014-0855ND
2014-09-021677-015-08506.30 ppb
2014-09-021677-016-08506.70 ppb
2014-09-021677-023-084521.6 ppb
2014-09-021677-024-08456.60 ppb
2014-10-071677-013-0730ND
2014-10-071677-014-0730ND
2014-10-071677-015-07306.10 ppb
2014-10-071677-016-07306.60 ppb
2014-10-071677-023-073021.5 ppb
2014-10-071677-024-07309.60 ppb
2014-11-041677-004-080427.7 ppb
2014-11-041677-005-081114.9 ppb
2014-11-041677-013-0950ND
2014-11-041677-014-0951ND
2014-11-041677-015-09546.40 ppb
2014-11-041677-016-09557.00 ppb
2014-11-041677-023-095322.4 ppb
2014-11-041677-024-09556.70 ppb
2014-12-021677-013-0950ND
2014-12-021677-015-09506.10 ppb
2014-12-021677-016-09506.60 ppb
2014-12-021677-023-095022.3 ppb
2014-12-021677-024-09506.40 ppb
2015-01-061677-013-0804ND
2015-01-061677-014-0805ND
2015-01-061677-015-08026.40 ppb
2015-01-061677-016-08036.80 ppb
2015-01-061677-023-080021.6 ppb
2015-01-061677-024-08016.70 ppb
2015-02-031677-004-090027.0 ppb
2015-02-031677-005-091014.0 ppb
2015-02-031677-013-1010ND
2015-02-031677-014-1010ND
2015-02-031677-015-10106.00 ppb
2015-02-031677-016-10106.00 ppb
2015-02-031677-023-101521.0 ppb
2015-02-031677-024-10006.00 ppb
2015-03-031677-013-0816ND
2015-03-031677-014-0818ND
2015-03-031677-015-08127.00 ppb
2015-03-031677-016-08147.00 ppb
2015-03-031677-023-080821.0 ppb
2015-03-031677-024-08107.00 ppb
2015-03-171677-003-092410.00 ppb
2015-04-071677-013-0734ND
2015-04-071677-014-0735ND
2015-04-071677-015-07327.00 ppb
2015-04-071677-016-07337.00 ppb
2015-04-071677-023-073021.0 ppb
2015-04-071677-024-07316.00 ppb
2015-05-051677-003-08366.00 ppb
2015-05-051677-004-084528.0 ppb
2015-05-051677-005-085314.0 ppb
2015-05-051677-013-08474.00 ppb
2015-05-051677-014-08504.00 ppb
2015-05-051677-014-09064.00 ppb
2015-05-051677-015-08548.00 ppb
2015-05-051677-016-08566.00 ppb
2015-05-051677-023-085717.0 ppb
2015-05-051677-024-09577.00 ppb
2015-06-021677-013-07426.00 ppb
2015-06-021677-014-07436.00 ppb
2015-06-021677-015-07408.00 ppb
2015-06-021677-016-07417.00 ppb
2015-06-021677-023-073820.0 ppb
2015-06-021677-024-07397.00 ppb
2015-07-071677-013-08179.00 ppb
2015-07-071677-014-08139.00 ppb
2015-07-071677-015-08159.00 ppb
2015-07-071677-016-08106.00 ppb
2015-07-071677-023-081510.00 ppb
2015-07-071677-024-08157.00 ppb
2015-08-041677-015-08193.00 ppb
2015-08-041677-016-08206.00 ppb
2015-08-041677-021-0817ND
2015-08-041677-022-0817ND
2015-08-041677-023-081311.0 ppb
2015-08-041677-024-08156.00 ppb
2015-09-011677-003-075510.00 ppb
2015-09-011677-004-081228.0 ppb
2015-09-011677-005-082115.0 ppb
2015-09-011677-015-09545.00 ppb
2015-09-011677-016-09567.00 ppb
2015-09-011677-021-0951ND
2015-09-011677-022-0949ND
2015-09-011677-023-094320.0 ppb
2015-09-011677-024-09477.00 ppb
2015-10-061677-013-1032ND
2015-10-061677-014-1033ND
2015-10-061677-015-10306.00 ppb
2015-10-061677-016-10317.00 ppb
2015-10-061677-023-102822.0 ppb
2015-10-061677-024-10297.00 ppb
2015-11-031677-015-09516.00 ppb
2015-11-031677-016-09536.00 ppb
2015-11-031677-021-0950ND
2015-11-031677-022-0948ND
2015-11-031677-023-094921.0 ppb
2015-11-031677-024-09507.00 ppb
2015-12-011677-003-09016.00 ppb
2015-12-011677-004-080626.0 ppb
2015-12-011677-005-081614.0 ppb
2015-12-011677-015-09186.00 ppb
2015-12-011677-016-09267.00 ppb
2015-12-011677-021-0925ND
2015-12-011677-022-0924ND
2015-12-011677-023-091522.0 ppb
2015-12-011677-024-09327.00 ppb
2016-01-051677-015-09178.00 ppb
2016-01-051677-016-09156.00 ppb
2016-01-051677-021-09203.00 ppb
2016-01-051677-022-09222.00 ppb
2016-01-051677-023-092521.0 ppb
2016-01-051677-024-09286.00 ppb
2016-02-021677-015-10296.00 ppb
2016-02-021677-016-10307.00 ppb
2016-02-021677-021-10313.00 ppb
2016-02-021677-022-10322.00 ppb
2016-02-021677-023-102721.0 ppb
2016-02-021677-024-10287.00 ppb
2016-03-011677-003-08046.00 ppb
2016-03-011677-004-081327.0 ppb
2016-03-011677-005-082715.0 ppb
2016-03-011677-015-08476.00 ppb
2016-03-011677-016-08506.00 ppb
2016-03-011677-021-08514.00 ppb
2016-03-011677-022-08522.00 ppb
2016-03-011677-023-084121.0 ppb
2016-03-011677-024-08446.00 ppb
2016-04-051677-015-09379.00 ppb
2016-04-051677-016-09327.00 ppb
2016-04-051677-021-09396.00 ppb
2016-04-051677-022-09413.00 ppb
2016-04-051677-023-092919.0 ppb
2016-04-051677-024-09347.00 ppb
2016-05-031677-015-09408.00 ppb
2016-05-031677-016-09416.00 ppb
2016-05-031677-021-08546.00 ppb
2016-05-031677-022-08554.00 ppb
2016-05-031677-023-085821.0 ppb
2016-05-031677-024-09066.00 ppb
2016-06-071677-004-082726.0 ppb
2016-06-071677-005-083514.0 ppb
2016-06-071677-015-09408.00 ppb
2016-06-071677-016-09327.00 ppb
2016-06-071677-021-093821.0 ppb
2016-06-071677-022-093721.0 ppb
2016-06-071677-023-093422.0 ppb
2016-06-071677-024-09457.00 ppb
2016-07-051677-015-09249.00 ppb
2016-07-051677-016-09196.00 ppb
2016-07-051677-021-092910.00 ppb
2016-07-051677-022-09316.00 ppb
2016-07-051677-023-092712.0 ppb
2016-07-051677-024-09208.00 ppb
2016-08-021677-010-08435.00 ppb
2016-08-021677-012-08518.00 ppb
2016-08-021677-013-09438.00 ppb
2016-08-021677-014-09448.00 ppb
2016-08-021677-015-09498.00 ppb
2016-08-021677-016-09337.00 ppb
2016-08-021677-023-094715.0 ppb
2016-08-021677-024-09367.00 ppb
2016-09-061677-003-10216.00 ppb
2016-09-061677-004-085827.0 ppb
2016-09-061677-005-090514.0 ppb
2016-09-061677-013-10356.00 ppb
2016-09-061677-014-10366.00 ppb
2016-09-061677-015-10396.00 ppb
2016-09-061677-016-10387.00 ppb
2016-09-061677-023-104116.0 ppb
2016-09-061677-024-10436.00 ppb
2016-10-041677-013-10298.00 ppb
2016-10-041677-014-10317.00 ppb
2016-10-041677-015-10277.00 ppb
2016-10-041677-016-10256.00 ppb
2016-10-041677-023-102311.0 ppb
2016-10-041677-024-10256.00 ppb
2016-11-011677-013-09279.00 ppb
2016-11-011677-014-09279.00 ppb
2016-11-011677-015-09249.00 ppb
2016-11-011677-016-09266.00 ppb
2016-11-011677-023-092417.0 ppb
2016-11-011677-024-09256.00 ppb
2016-12-061677-004-090026.0 ppb
2016-12-061677-005-085714.0 ppb
2016-12-061677-013-083210.00 ppb
2016-12-061677-014-083510.00 ppb
2016-12-061677-015-082710.00 ppb
2016-12-061677-016-08297.00 ppb
2016-12-061677-023-082011.0 ppb
2016-12-061677-024-082410.00 ppb
2017-01-031677-015-09515.00 ppb
2017-01-031677-016-09507.00 ppb
2017-01-031677-021-09365.00 ppb
2017-01-031677-022-09343.00 ppb
2017-01-031677-023-094210.00 ppb
2017-01-031677-024-09479.00 ppb
2017-02-141677-015-09103.00 ppb
2017-02-141677-016-09096.00 ppb
2017-02-141677-021-0907ND
2017-02-141677-022-0906ND
2017-02-141677-023-090319.0 ppb
2017-02-141677-024-09027.00 ppb
2017-03-071677-004-081726.0 ppb
2017-03-071677-005-082114.0 ppb
2017-03-071677-013-0835ND
2017-03-071677-014-0837ND
2017-03-071677-015-08415.00 ppb
2017-03-071677-016-08427.00 ppb
2017-03-071677-023-083920.0 ppb
2017-03-071677-024-08389.00 ppb
2017-04-041677-003-09037.00 ppb
2017-04-041677-004-092527.0 ppb
2017-04-041677-005-092014.0 ppb
2017-04-041677-013-0923ND
2017-04-041677-014-0903ND
2017-04-041677-015-09336.00 ppb
2017-04-041677-016-09247.00 ppb
2017-04-041677-023-093526.0 ppb
2017-04-041677-024-09346.00 ppb
2017-05-021677-013-0856ND
2017-05-021677-014-0855ND
2017-05-021677-015-08475.00 ppb
2017-05-021677-016-08497.00 ppb
2017-05-021677-023-084619.0 ppb
2017-05-021677-024-08447.00 ppb
2017-06-061677-011-08236.00 ppb
2017-06-061677-013-0822ND
2017-06-061677-014-0824ND
2017-06-061677-015-08205.00 ppb
2017-06-061677-016-08216.00 ppb
2017-06-061677-023-081819.0 ppb
2017-06-061677-024-08198.00 ppb
2017-07-055867-003-08156.00 ppb
2017-07-055867-004-083024.0 ppb
2017-07-055867-005-083513.0 ppb
2017-07-055867-015-10575.00 ppb
2017-07-055867-016-10596.00 ppb
2017-07-055867-023-105217.0 ppb
2017-07-055867-024-10558.00 ppb
2017-08-025867-015-10085.00 ppb
2017-08-025867-016-10096.00 ppb
2017-08-025867-023-100918.0 ppb
2017-08-025867-024-10077.00 ppb
2017-09-065867-015-10085.00 ppb
2017-09-065867-016-10087.00 ppb
2017-09-065867-023-100419.0 ppb
2017-09-065867-024-10059.00 ppb
2017-10-045867-003-09348.00 ppb
2017-10-045867-004-094328.0 ppb
2017-10-045867-005-094915.0 ppb
2017-10-045867-013-10057.00 ppb
2017-10-045867-014-10086.00 ppb
2017-10-045867-015-10008.00 ppb
2017-10-045867-016-10026.00 ppb
2017-10-045867-023-095318.0 ppb
2017-10-045867-024-09579.00 ppb
2017-11-015867-015-10397.00 ppb
2017-11-015867-016-10377.00 ppb
2017-11-015867-023-103224.0 ppb
2017-11-015867-024-103111.0 ppb
2017-12-065867-013-08594.00 ppb
2017-12-065867-014-09004.00 ppb
2017-12-065867-015-09016.00 ppb
2017-12-065867-016-09027.00 ppb
2017-12-065867-023-085620.0 ppb
2017-12-065867-024-085511.0 ppb
2018-01-035867-004-092225.0 ppb
2018-01-035867-005-092914.0 ppb
2018-01-035867-013-09444.00 ppb
2018-01-035867-015-09416.00 ppb
2018-01-035867-016-09407.00 ppb
2018-01-035867-023-093620.0 ppb
2018-01-035867-024-093710.00 ppb
2018-01-175867-003-090011.0 ppb
2018-02-145867-003-09138.00 ppb
2018-02-145867-013-10198.00 ppb
2018-02-145867-015-10229.00 ppb
2018-02-145867-016-10236.00 ppb
2018-02-145867-023-101516.0 ppb
2018-02-145867-024-101610.00 ppb
2018-03-075867-015-105010.00 ppb
2018-03-285867-011-09157.00 ppb
2018-04-045867-015-09322.00 ppb
2018-04-045867-016-09346.00 ppb
2018-04-045867-021-0936ND
2018-04-045867-022-0937ND
2018-04-045867-023-093121.0 ppb
2018-04-045867-024-09297.00 ppb
2018-04-185867-003-09248.00 ppb
2018-04-185867-004-093627.0 ppb
2018-04-185867-005-094715.0 ppb
2018-05-025867-015-09232.00 ppb
2018-05-025867-016-09248.00 ppb
2018-05-025867-021-0927ND
2018-05-025867-022-0929ND
2018-05-025867-023-091920.0 ppb
2018-05-025867-024-09208.00 ppb
2018-06-065867-015-09047.00 ppb
2018-06-065867-016-09062.00 ppb
2018-06-065867-021-0907ND
2018-06-065867-022-0909ND
2018-06-065867-023-090317.0 ppb
2018-06-065867-024-090214.0 ppb
2018-07-055867-015-09387.00 ppb
2018-07-055867-016-09357.00 ppb
2018-07-055867-021-0942ND
2018-07-055867-022-0943ND
2018-07-055867-023-094020.0 ppb
2018-07-055867-024-094110.00 ppb
2018-07-115867-003-09308.00 ppb
2018-07-115867-004-094127.0 ppb
2018-07-115867-005-094714.0 ppb
2018-08-015867-015-09397.00 ppb
2018-08-015867-016-09425.00 ppb
2018-08-015867-021-09444.00 ppb
2018-08-015867-022-09462.00 ppb
2018-08-015867-023-093515.0 ppb
2018-08-015867-024-093715.0 ppb
2018-09-055867-015-09218.00 ppb
2018-09-055867-016-09227.00 ppb
2018-09-055867-021-09256.00 ppb
2018-09-055867-022-09274.00 ppb
2018-09-055867-023-091418.0 ppb
2018-09-055867-024-091817.0 ppb
2018-10-035867-003-09527.00 ppb
2018-10-035867-004-100523.0 ppb
2018-10-035867-005-101513.0 ppb
2018-10-035867-015-10428.00 ppb
2018-10-035867-016-10447.00 ppb
2018-10-035867-021-10487.00 ppb
2018-10-035867-023-103917.0 ppb
2018-10-035867-024-104010.00 ppb
2018-11-075867-015-091210.00 ppb
2018-11-075867-016-09149.00 ppb
2018-11-075867-023-090415.0 ppb
2018-11-075867-024-090212.0 ppb
2018-12-055867-013-11509.00 ppb
2018-12-055867-014-10328.00 ppb
2018-12-055867-015-10249.00 ppb
2018-12-055867-016-10256.00 ppb
2018-12-055867-023-102017.0 ppb
2018-12-055867-024-102110.00 ppb
2019-01-025867-003-09478.00 ppb
2019-01-025867-004-095726.0 ppb
2019-01-025867-005-100515.0 ppb
2019-01-025867-015-08339.00 ppb
2019-01-025867-016-08348.00 ppb
2019-01-025867-023-083215.0 ppb
2019-01-025867-024-083014.0 ppb
2019-02-065867-015-093412.0 ppb
2019-02-065867-016-09357.00 ppb
2019-02-065867-023-092615.0 ppb
2019-02-065867-024-09276.00 ppb
2019-03-065867-015-092712.0 ppb
2019-03-065867-016-09255.00 ppb
2019-03-065867-023-09218.00 ppb
2019-03-065867-024-09237.00 ppb
2019-04-105867-003-09268.00 ppb
2019-04-105867-004-094225.0 ppb
2019-04-105867-005-095314.0 ppb
2019-04-105867-010-10115.00 ppb
2019-04-105867-015-09356.00 ppb
2019-04-105867-016-09385.00 ppb
2019-04-105867-023-092718.0 ppb
2019-04-105867-024-09326.00 ppb
2019-05-015867-015-09567.00 ppb
2019-05-015867-016-09596.00 ppb
2019-05-015867-023-095020.0 ppb
2019-05-015867-024-09537.00 ppb
2019-06-055867-015-09175.00 ppb
2019-06-055867-016-09215.00 ppb
2019-06-055867-023-091115.0 ppb
2019-06-055867-024-09147.00 ppb
2019-07-015867-003-09478.00 ppb
2019-07-015867-004-101021.0 ppb
2019-07-015867-005-095814.0 ppb
2019-07-015867-015-10115.00 ppb
2019-07-015867-016-10085.00 ppb
2019-07-015867-021-1013ND
2019-07-015867-022-1012ND
2019-07-015867-023-100615.0 ppb
2019-07-015867-024-10056.00 ppb
2019-08-075867-015-10157.00 ppb
2019-08-075867-016-10165.00 ppb
2019-08-075867-021-1011ND
2019-08-075867-022-1012ND
2019-08-075867-023-100520.0 ppb
2019-08-075867-024-10067.00 ppb
2019-09-045867-015-09236.00 ppb
2019-09-045867-016-09245.00 ppb
2019-09-045867-023-092615.0 ppb
2019-09-045867-024-09277.00 ppb
2019-10-025867-003-09037.00 ppb
2019-10-025867-004-092125.0 ppb
2019-10-025867-005-093014.0 ppb
2019-10-025867-015-10548.00 ppb
2019-10-025867-016-10566.00 ppb
2019-10-025867-023-105020.0 ppb
2019-10-025867-024-10528.00 ppb
2019-11-065867-015-10436.00 ppb
2019-11-065867-016-10435.00 ppb
2019-11-065867-021-10445.00 ppb
2019-11-065867-022-10444.00 ppb
2019-11-065867-023-104212.0 ppb
2019-11-065867-024-10429.00 ppb
2019-12-045867-015-085210.00 ppb
2019-12-045867-016-08536.00 ppb
2019-12-045867-021-08479.00 ppb
2019-12-045867-022-08467.00 ppb
2019-12-045867-023-085117.0 ppb
2019-12-045867-024-085012.0 ppb