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EWG's Tap Water Database — 2021 UPDATE

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Arsenic

West Kern Water District

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

 

929

Samples

6

Samples exceeding legal limit (MCL)

482

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.23 ppb20986ND - 4.20 ppb
20151.43 ppb265104ND - 20.0 ppb
20162.38 ppb202147ND - 19.3 ppb
2017N/A00N/A
20181.00 ppb13476ND - 3.82 ppb
20190.932 ppb11969ND - 3.95 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
2014-01-085806-002-07454.20 ppb
2014-01-085806-004-08052.10 ppb
2014-01-085806-005-0925ND
2014-01-085806-008-12402.90 ppb
2014-01-085806-013-08303.20 ppb
2014-01-085806-014-1045ND
2014-01-085806-015-0955ND
2014-01-085806-021-1115ND
2014-01-295806-002-12402.50 ppb
2014-01-295806-004-1020ND
2014-01-295806-005-12002.50 ppb
2014-01-295806-008-13302.20 ppb
2014-01-295806-013-11002.60 ppb
2014-01-295806-014-0955ND
2014-01-295806-015-11202.30 ppb
2014-01-295806-016-0905ND
2014-01-295806-017-08203.60 ppb
2014-01-295806-018-0920ND
2014-01-295806-019-0800ND
2014-01-295806-020-0845ND
2014-01-295806-021-1040ND
2014-02-265806-002-10403.40 ppb
2014-02-265806-004-1105ND
2014-02-265806-013-12202.70 ppb
2014-02-265806-015-1300ND
2014-02-265806-017-08303.30 ppb
2014-02-265806-019-0805ND
2014-02-265806-021-1130ND
2014-03-125806-002-12253.00 ppb
2014-03-125806-004-1055ND
2014-03-125806-005-11152.60 ppb
2014-03-125806-008-14104.20 ppb
2014-03-125806-013-10352.50 ppb
2014-03-125806-014-1140ND
2014-03-125806-015-1250ND
2014-03-125806-016-09202.20 ppb
2014-03-125806-017-08303.70 ppb
2014-03-125806-018-0940ND
2014-03-125806-019-1000ND
2014-03-125806-020-0850ND
2014-03-125806-021-1320ND
2014-03-265806-004-1100ND
2014-03-265806-005-11152.20 ppb
2014-03-265806-008-13053.80 ppb
2014-03-265806-013-10102.90 ppb
2014-03-265806-014-1035ND
2014-03-265806-015-12402.20 ppb
2014-03-265806-016-0815ND
2014-03-265806-017-08553.80 ppb
2014-03-265806-018-0755ND
2014-03-265806-019-0915ND
2014-03-265806-020-0835ND
2014-03-265806-021-1220ND
2014-04-095806-004-09552.10 ppb
2014-04-095806-005-10553.30 ppb
2014-04-095806-008-12303.70 ppb
2014-04-095806-013-10353.30 ppb
2014-04-095806-014-1115ND
2014-04-095806-015-12002.60 ppb
2014-04-095806-016-08252.30 ppb
2014-04-095806-017-09004.10 ppb
2014-04-095806-018-0805ND
2014-04-095806-019-0920ND
2014-04-095806-020-0840ND
2014-04-095806-021-1135ND
2014-04-235806-004-1220ND
2014-04-235806-005-11203.00 ppb
2014-04-235806-008-13153.30 ppb
2014-04-235806-013-10402.90 ppb
2014-04-235806-014-1100ND
2014-04-235806-015-1020ND
2014-04-235806-016-0805ND
2014-04-235806-017-08153.80 ppb
2014-04-235806-018-0915ND
2014-04-235806-019-0755ND
2014-04-235806-020-0835ND
2014-04-235806-021-1245ND
2014-05-075806-004-1040ND
2014-05-075806-005-1010ND
2014-05-075806-008-14303.60 ppb
2014-05-075806-013-09402.20 ppb
2014-05-075806-014-0830ND
2014-05-075806-015-0915ND
2014-05-075806-016-1220ND
2014-05-075806-017-13053.50 ppb
2014-05-075806-018-1140ND
2014-05-075806-019-1330ND
2014-05-075806-020-1240ND
2014-05-075806-021-0815ND
2014-05-225806-004-1010ND
2014-05-225806-005-07503.30 ppb
2014-05-225806-008-11203.90 ppb
2014-05-225806-013-08103.00 ppb
2014-05-225806-014-0940ND
2014-05-225806-015-0840ND
2014-05-225806-016-1240ND
2014-05-225806-017-13253.90 ppb
2014-05-225806-018-1215ND
2014-05-225806-020-1300ND
2014-05-225806-021-0915ND
2014-05-285806-004-0930ND
2014-05-285806-005-09103.20 ppb
2014-05-285806-008-12553.60 ppb
2014-05-285806-013-11302.40 ppb
2014-05-285806-014-0815ND
2014-05-285806-015-08402.20 ppb
2014-05-285806-016-1105ND
2014-05-285806-017-11454.10 ppb
2014-05-285806-018-1045ND
2014-05-285806-020-1125ND
2014-05-285806-021-0755ND
2014-06-125806-004-0825ND
2014-06-125806-005-0905ND
2014-06-125806-008-11153.10 ppb
2014-06-125806-013-09352.90 ppb
2014-06-125806-014-0845ND
2014-06-125806-015-10502.40 ppb
2014-06-125806-016-1240ND
2014-06-125806-017-13254.00 ppb
2014-06-125806-018-1220ND
2014-06-125806-020-1300ND
2014-06-125806-021-1020ND
2014-06-185806-004-0820ND
2014-06-185806-005-09102.40 ppb
2014-06-185806-008-13353.20 ppb
2014-06-185806-013-08452.70 ppb
2014-06-185806-014-1010ND
2014-06-185806-015-0940ND
2014-06-185806-016-1215ND
2014-06-185806-017-13053.80 ppb
2014-06-185806-018-1120ND
2014-06-185806-020-1240ND
2014-06-185806-021-1035ND
2014-08-135806-002-0815ND
2014-08-135806-004-0835ND
2014-08-135806-005-1030ND
2014-08-135806-008-13553.00 ppb
2014-08-135806-013-09152.90 ppb
2014-08-135806-014-0940ND
2014-08-135806-016-1300ND
2014-08-135806-017-12153.10 ppb
2014-08-135806-019-1145ND
2014-08-135806-020-1240ND
2014-08-135806-021-1005ND
2014-08-275806-002-07502.40 ppb
2014-08-275806-004-0810ND
2014-08-275806-013-09153.20 ppb
2014-08-275806-015-09352.60 ppb
2014-08-275806-017-10303.60 ppb
2014-08-275806-019-1010ND
2014-08-275806-020-1100ND
2014-08-275806-021-0830ND
2014-09-105806-002-09452.50 ppb
2014-09-105806-004-1200ND
2014-09-105806-008-13052.40 ppb
2014-09-105806-013-11103.10 ppb
2014-09-105806-014-1050ND
2014-09-105806-015-11302.10 ppb
2014-09-105806-017-08452.90 ppb
2014-09-105806-019-0820ND
2014-09-105806-020-0905ND
2014-09-105806-021-1030ND
2014-10-085806-002-08102.90 ppb
2014-10-085806-004-0830ND
2014-10-085806-008-13002.40 ppb
2014-10-085806-013-09453.30 ppb
2014-10-085806-014-0910ND
2014-10-085806-015-10152.10 ppb
2014-10-085806-017-11203.90 ppb
2014-10-085806-019-1100ND
2014-10-085806-020-1220ND
2014-10-085806-021-0850ND
2014-10-225806-002-10302.40 ppb
2014-10-225806-004-1135ND
2014-10-225806-008-12303.80 ppb
2014-10-225806-013-09303.40 ppb
2014-10-225806-014-1050ND
2014-10-225806-015-09502.40 ppb
2014-10-225806-019-0815ND
2014-10-225806-020-0855ND
2014-10-225806-021-1115ND
2014-11-195806-004-1150ND
2014-11-195806-005-10453.30 ppb
2014-11-195806-013-11003.20 ppb
2014-11-195806-014-1010ND
2014-11-195806-015-12352.30 ppb
2014-12-105806-004-1215ND
2014-12-105806-005-10253.00 ppb
2014-12-105806-008-12003.30 ppb
2014-12-105806-013-10403.20 ppb
2014-12-105806-014-0950ND
2014-12-105806-015-1100ND
2014-12-105806-016-0900ND
2014-12-105806-017-08202.50 ppb
2014-12-105806-018-0915ND
2014-12-105806-019-0800ND
2014-12-105806-020-0840ND
2014-12-105806-021-1010ND
2014-12-305806-004-1020ND
2014-12-305806-005-08353.00 ppb
2014-12-305806-008-11152.80 ppb
2014-12-305806-013-0935ND
2014-12-305806-014-0810ND
2014-12-305806-015-0900ND
2014-12-305806-016-1235ND
2014-12-305806-017-13202.70 ppb
2014-12-305806-018-1205ND
2014-12-305806-019-1350ND
2014-12-305806-020-1255ND
2015-01-145806-002-0750ND
2015-01-145810-002-0750ND
2015-01-145806-004-1055ND
2015-01-145810-004-1055ND
2015-01-145806-005-08103.10 ppb
2015-01-145810-005-08103.10 ppb
2015-01-145806-008-1345ND
2015-01-145810-008-1345ND
2015-01-145806-013-10352.30 ppb
2015-01-145810-013-10352.30 ppb
2015-01-145806-014-0915ND
2015-01-145810-014-0915ND
2015-01-145806-015-0835ND
2015-01-145810-015-0835ND
2015-01-145806-016-1215ND
2015-01-145810-016-1215ND
2015-01-145806-017-12502.90 ppb
2015-01-145810-017-12502.90 ppb
2015-01-145806-018-1325ND
2015-01-145810-018-1325ND
2015-01-145806-019-1310ND
2015-01-145810-019-1310ND
2015-01-145806-020-1240ND
2015-01-145810-020-1240ND
2015-01-295806-002-12202.50 ppb
2015-01-295806-004-1010ND
2015-01-295806-005-10303.90 ppb
2015-01-295806-008-12502.70 ppb
2015-01-295806-013-11153.00 ppb
2015-01-295806-014-1050ND
2015-01-295806-015-11352.10 ppb
2015-01-295806-016-0810ND
2015-01-295806-017-08553.20 ppb
2015-01-295806-018-0745ND
2015-01-295806-019-0920ND
2015-01-295806-020-0835ND
2015-02-115806-004-0925ND
2015-02-115806-005-07553.90 ppb
2015-02-115806-008-12304.20 ppb
2015-02-115806-013-08353.10 ppb
2015-02-115806-014-0815ND
2015-02-115806-015-08552.30 ppb
2015-02-115806-016-1035ND
2015-02-115806-017-11203.50 ppb
2015-02-115806-018-1115ND
2015-02-115806-019-1140ND
2015-02-115806-020-1055ND
2015-02-255806-002-0835ND
2015-02-255806-004-0900ND
2015-02-255806-005-10153.50 ppb
2015-02-255806-008-1405ND
2015-02-255806-014-0955ND
2015-02-255806-015-0750ND
2015-02-255806-016-1225ND
2015-02-255806-017-13153.00 ppb
2015-02-255806-018-1125ND
2015-02-255806-019-1335ND
2015-02-255806-020-1250ND
2015-02-255806-021-0930ND
2015-03-115806-002-08202.70 ppb
2015-03-115806-004-0840ND
2015-03-115806-005-09303.60 ppb
2015-03-115806-008-14254.30 ppb
2015-03-115806-013-10452.60 ppb
2015-03-115806-014-0905ND
2015-03-115806-015-1015ND
2015-03-115806-016-1330ND
2015-03-115806-017-12303.00 ppb
2015-03-115806-018-1355ND
2015-03-115806-019-1205ND
2015-03-115806-020-1300ND
2015-03-115806-021-1115ND
2015-03-255806-002-11553.60 ppb
2015-03-255806-004-1050ND
2015-03-255806-005-10303.30 ppb
2015-03-255806-008-12103.90 ppb
2015-03-255806-014-1010ND
2015-03-255806-015-11252.40 ppb
2015-03-255806-016-0830ND
2015-03-255806-017-09153.30 ppb
2015-03-255806-018-0810ND
2015-03-255806-019-0935ND
2015-03-255806-020-0858ND
2015-03-255806-021-1105ND
2015-04-085806-002-07503.50 ppb
2015-04-085806-004-0815ND
2015-04-085806-005-09303.60 ppb
2015-04-085806-008-10553.90 ppb
2015-04-085806-014-0905ND
2015-04-085806-015-10052.70 ppb
2015-04-085806-017-12553.40 ppb
2015-04-085806-018-1130ND
2015-04-085806-019-1245ND
2015-04-085806-020-1155ND
2015-04-085806-021-0840ND
2015-04-225806-002-07553.90 ppb
2015-04-225806-004-0815ND
2015-04-225806-005-09153.80 ppb
2015-04-225806-008-11003.40 ppb
2015-04-225806-014-0855ND
2015-04-225806-015-09453.20 ppb
2015-04-225806-016-1220ND
2015-04-225806-017-13054.10 ppb
2015-04-225806-018-1140ND
2015-04-225806-019-1325ND
2015-04-225806-020-1245ND
2015-04-225806-021-0835ND
2015-05-135806-002-10504.10 ppb
2015-05-135806-008-13204.60 ppb
2015-05-135806-013-12202.60 ppb
2015-05-135806-014-1130ND
2015-05-135806-015-12453.00 ppb
2015-05-135806-016-0820ND
2015-05-135806-017-08454.10 ppb
2015-05-135806-018-0800ND
2015-05-135806-019-0735ND
2015-05-135806-020-0910ND
2015-05-135806-021-1110ND
2015-05-275806-002-09253.50 ppb
2015-05-275806-004-0950ND
2015-05-275806-005-08502.80 ppb
2015-05-275806-008-10452.40 ppb
2015-05-275806-014-0825ND
2015-05-275806-016-1325ND
2015-05-275806-018-1130ND
2015-05-275806-019-1155ND
2015-05-275806-020-1250ND
2015-05-275806-021-0805ND
2015-06-105806-002-08153.80 ppb
2015-06-105806-004-0940ND
2015-06-105806-005-08253.70 ppb
2015-06-105806-008-11153.90 ppb
2015-06-105806-013-10402.60 ppb
2015-06-105806-014-0845ND
2015-06-105806-016-1330ND
2015-06-105806-017-12202.90 ppb
2015-06-105806-018-1400ND
2015-06-105806-019-1305ND
2015-06-105806-020-1240ND
2015-06-105806-021-0910ND
2015-06-245806-004-1030ND
2015-06-245806-005-11103.40 ppb
2015-06-245806-008-12502.30 ppb
2015-06-245806-013-1130ND
2015-06-245806-014-1145ND
2015-06-245806-016-0905ND
2015-06-245810-016-0905ND
2015-06-245806-017-07353.10 ppb
2015-06-245810-017-0735ND
2015-06-245810-018-0945ND
2015-06-245806-019-0945ND
2015-06-245806-020-0820ND
2015-06-245810-020-0820ND
2015-06-245806-021-1050ND
2015-07-015806-002-1030ND
2015-07-015806-004-11155.50 ppb
2015-07-015806-005-1205ND
2015-07-015806-008-1330ND
2015-07-015806-013-12507.60 ppb
2015-07-015806-014-110020.0 ppb
2015-07-015806-016-0850ND
2015-07-015806-017-0750ND
2015-07-015806-018-0935ND
2015-07-015806-020-0830ND
2015-07-015806-021-1125ND
2015-07-165806-002-09554.60 ppb
2015-07-165806-004-1040ND
2015-07-165806-005-10104.20 ppb
2015-07-165806-008-13253.90 ppb
2015-07-165806-013-10553.30 ppb
2015-07-165806-014-11252.30 ppb
2015-07-165806-017-08004.40 ppb
2015-07-165806-018-0910ND
2015-07-165806-020-0855ND
2015-07-165806-021-10302.40 ppb
2015-08-055806-002-11305.00 ppb
2015-08-055806-004-0955ND
2015-08-055806-005-11004.40 ppb
2015-08-055806-008-13103.10 ppb
2015-08-055806-013-10502.80 ppb
2015-08-055806-014-1030ND
2015-08-055806-016-0820ND
2015-08-055806-017-08504.10 ppb
2015-08-055806-018-0755ND
2015-08-055806-020-0910ND
2015-08-055806-021-1120ND
2015-08-195806-002-10004.20 ppb
2015-08-195806-004-1055ND
2015-08-195806-005-10154.00 ppb
2015-08-195806-008-12252.40 ppb
2015-08-195806-014-1025ND
2015-08-195806-017-09003.80 ppb
2015-08-195806-018-0755ND
2015-08-195806-020-0815ND
2015-08-195806-021-1035ND
2015-09-025806-002-08504.80 ppb
2015-09-025806-004-0910ND
2015-09-025806-005-07354.30 ppb
2015-09-025806-008-1325ND
2015-09-025806-014-0935ND
2015-09-025806-016-1120ND
2015-09-025806-017-12404.00 ppb
2015-09-025806-018-1020ND
2015-09-025806-019-1040ND
2015-09-025806-020-1220ND
2015-09-025806-021-08002.10 ppb
2015-09-095810-019-0845ND
2015-09-175806-002-11054.30 ppb
2015-09-175806-004-0820ND
2015-09-175806-005-11353.40 ppb
2015-09-175806-008-14202.60 ppb
2015-09-175806-014-0915ND
2015-09-175806-015-08502.50 ppb
2015-09-175806-016-1255ND
2015-09-175806-017-13093.30 ppb
2015-09-175806-018-1208ND
2015-09-175806-019-1230ND
2015-09-175806-020-1320ND
2015-09-175806-021-1050ND
2015-10-065806-002-11404.50 ppb
2015-10-065806-004-1020ND
2015-10-065806-005-09454.10 ppb
2015-10-065806-008-12253.70 ppb
2015-10-065806-014-0915ND
2015-10-065806-015-10502.80 ppb
2015-10-065806-021-0835ND
2015-10-075806-016-0810ND
2015-10-075806-017-09203.30 ppb
2015-10-075806-018-0750ND
2015-10-075806-019-0845ND
2015-10-075806-020-0950ND
2015-11-035806-002-08354.70 ppb
2015-11-035806-004-1110ND
2015-11-035806-005-09204.00 ppb
2015-11-035806-008-14003.00 ppb
2015-11-035806-014-0955ND
2015-11-035806-015-11453.20 ppb
2015-11-035806-021-1035ND
2015-11-045806-016-0900ND
2015-11-045806-017-08203.60 ppb
2015-11-045806-018-0950ND
2015-11-045806-019-0800ND
2015-11-045806-020-0925ND
2015-11-175806-002-08354.80 ppb
2015-11-175806-004-1005ND
2015-11-175806-005-11154.10 ppb
2015-11-175806-008-13004.70 ppb
2015-11-175806-014-1136ND
2015-11-175806-015-09053.80 ppb
2015-11-195806-016-0920ND
2015-11-195806-017-10103.40 ppb
2015-11-195806-018-0910ND
2015-11-195806-019-1035ND
2015-11-195806-020-0945ND
2015-12-155806-002-10354.80 ppb
2015-12-155806-005-08154.00 ppb
2015-12-155806-008-14352.60 ppb
2015-12-155806-014-09302.10 ppb
2015-12-155806-015-09003.30 ppb
2015-12-155806-021-1005ND
2015-12-165806-016-0955ND
2015-12-165806-017-10403.70 ppb
2015-12-165806-018-1015ND
2015-12-165806-019-1055ND
2015-12-165806-020-0805ND
2016-01-065806-002-10204.80 ppb
2016-01-065806-004-0910ND
2016-01-065806-005-07553.30 ppb
2016-01-065806-008-14153.40 ppb
2016-01-065806-014-08402.00 ppb
2016-01-065806-015-08153.00 ppb
2016-01-065806-021-0935ND
2016-01-075806-017-08452.80 ppb
2016-01-075806-018-1025ND
2016-01-075806-019-1010ND
2016-01-075806-020-0810ND
2016-01-195806-002-10353.80 ppb
2016-01-195806-004-0825ND
2016-01-195806-005-1025ND
2016-01-195806-008-14102.40 ppb
2016-01-195806-014-0935ND
2016-01-195806-015-09053.60 ppb
2016-01-195806-021-0815ND
2016-02-021396-002-14574.60 ppb
2016-02-021396-005-14573.50 ppb
2016-02-021396-008-14572.70 ppb
2016-02-021396-014-14571.70 ppb
2016-02-021396-021-14571.50 ppb
2016-02-031396-016-10271.60 ppb
2016-02-031396-017-10272.30 ppb
2016-02-031396-019-10270.720 ppb
2016-02-031396-020-1027ND
2016-02-171396-002-13175.20 ppb
2016-02-171396-004-13171.26 ppb
2016-02-171396-005-13171.66 ppb
2016-02-171396-008-13172.49 ppb
2016-02-171396-013-13172.73 ppb
2016-02-171396-014-13171.70 ppb
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