Know Your Environment. Protect Your Health.

Arsenic

China Lake Naval Air Weapons Station

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.

 

352

Samples

68

Samples exceeding legal limit (MCL)

268

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20185.91 ppb5140ND - 17.0 ppb
20196.26 ppb5341ND - 18.0 ppb
20206.35 ppb5341ND - 18.0 ppb
20215.43 ppb5444ND - 15.0 ppb
20224.56 ppb6350ND - 13.0 ppb
20234.00 ppb7852ND - 13.0 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-01-03CA1510703_004_004-2018010309005.70 ppb
2018-01-10CA1510703_017_017-2018011009304.80 ppb
2018-01-10CA1510703_013_013-2018011008302.00 ppb
2018-01-10CA1510703_004_004-20180110090016.0 ppb
2018-01-10CA1510703_002_002-201801100730ND
2018-02-05CA1510703_004_004-201802051000ND
2018-02-06CA1510703_013_013-2018020608452.30 ppb
2018-02-06CA1510703_017_017-2018020609156.70 ppb
2018-02-06CA1510703_004_004-20180206090016.0 ppb
2018-02-06CA1510703_002_002-201802060800ND
2018-03-07CA1510703_002_002-201803070730ND
2018-03-07CA1510703_004_004-20180307084014.0 ppb
2018-03-07CA1510703_013_013-2018030708202.90 ppb
2018-03-07CA1510703_017_017-2018030709206.10 ppb
2018-04-04CA1510703_002_002-2018040409002.00 ppb
2018-04-04CA1510703_004_004-20180404091515.0 ppb
2018-04-04CA1510703_013_013-2018040408453.10 ppb
2018-04-04CA1510703_017_017-2018040409458.20 ppb
2018-05-02CA1510703_017_017-2018050209309.10 ppb
2018-05-02CA1510703_004_004-20180502091016.0 ppb
2018-05-02CA1510703_013_013-2018050208452.90 ppb
2018-05-02CA1510703_002_002-201805020800ND
2018-06-06CA1510703_002_002-201806060730ND
2018-06-06CA1510703_004_004-20180606083514.0 ppb
2018-06-06CA1510703_013_013-2018060608153.50 ppb
2018-06-06CA1510703_004_004-20180606084015.0 ppb
2018-06-06CA1510703_017_017-2018060608507.20 ppb
2018-07-10CA1510703_002_002-201807100730ND
2018-07-10CA1510703_017_017-2018071008457.70 ppb
2018-07-10CA1510703_013_013-2018071008053.00 ppb
2018-07-10CA1510703_004_004-20180710082015.0 ppb
2018-08-01CA1510703_002_002-2018080107302.00 ppb
2018-08-01CA1510703_013_013-2018080108153.20 ppb
2018-08-01CA1510703_017_017-2018080108554.90 ppb
2018-09-12CA1510703_004_004-20180912091015.0 ppb
2018-09-12CA1510703_013_013-2018091209002.50 ppb
2018-09-12CA1510703_002_002-201809120830ND
2018-09-12CA1510703_017_017-2018091209204.90 ppb
2018-10-10CA1510703_002_002-201810100730ND
2018-10-10CA1510703_017_017-2018101008504.60 ppb
2018-10-10CA1510703_013_013-2018101008152.60 ppb
2018-10-10CA1510703_004_004-20181010083012.0 ppb
2018-11-07CA1510703_013_013-2018110707004.00 ppb
2018-11-07CA1510703_002_002-201811070640ND
2018-11-07CA1510703_004_004-20181107081014.0 ppb
2018-11-07CA1510703_017_017-2018110707305.50 ppb
2018-12-03CA1510703_004_004-201812031040ND
2018-12-04CA1510703_002_002-2018120407302.20 ppb
2018-12-04CA1510703_004_004-20181204084017.0 ppb
2018-12-04CA1510703_013_013-2018120408203.70 ppb
2018-12-04CA1510703_017_017-2018120409005.30 ppb
2019-01-09CA1510703_013_013-2019010907303.00 ppb
2019-01-09CA1510703_004_004-20190109080016.0 ppb
2019-01-09CA1510703_017_017-2019010908153.60 ppb
2019-01-09CA1510703_002_002-201901090700ND
2019-02-04CA1510703_002_002-201902040930ND
2019-02-05CA1510703_004_004-20190205073515.0 ppb
2019-02-05CA1510703_013_013-201902050730ND
2019-02-05CA1510703_017_017-2019020507503.30 ppb
2019-02-05CA1510703_002_002-201902050700ND
2019-03-13CA1510703_002_002-2019031307002.10 ppb
2019-03-13CA1510703_013_013-2019031307354.00 ppb
2019-03-13CA1510703_017_017-2019031307505.20 ppb
2019-03-13CA1510703_004_004-20190313083516.0 ppb
2019-04-02CA1510703_004_004-20190402083517.0 ppb
2019-04-02CA1510703_002_002-201904020705ND
2019-04-02CA1510703_013_013-2019040207303.50 ppb
2019-04-02CA1510703_017_017-2019040207454.20 ppb
2019-04-30CA1510703_002_002-201904300720ND
2019-04-30CA1510703_004_004-20190430083516.0 ppb
2019-04-30CA1510703_013_013-2019043007453.70 ppb
2019-04-30CA1510703_017_017-2019043008004.00 ppb
2019-05-22CA1510703_004_004-20190522111018.0 ppb
2019-05-22CA1510703_002_002-2019052212202.80 ppb
2019-05-22CA1510703_013_013-2019052212055.70 ppb
2019-05-22CA1510703_017_017-20190522112510.00 ppb
2019-06-12CA1510703_004_004-20190612084014.0 ppb
2019-06-12CA1510703_002_002-201906120720ND
2019-06-12CA1510703_013_013-2019061207453.70 ppb
2019-06-12CA1510703_017_017-2019061208053.40 ppb
2019-07-01CA1510703_002_002-201907010705ND
2019-07-01CA1510703_013_013-2019070108403.60 ppb
2019-07-01CA1510703_004_004-2019070108159.20 ppb
2019-07-01CA1510703_017_017-2019070109008.60 ppb
2019-08-14CA1510703_013_013-2019081408103.30 ppb
2019-08-14CA1510703_017_017-2019081408259.40 ppb
2019-08-14CA1510703_002_002-2019081407152.10 ppb
2019-08-14CA1510703_004_004-20190814074516.0 ppb
2019-09-17CA1510703_002_002-201909170610ND
2019-09-17CA1510703_013_013-2019091707103.10 ppb
2019-09-17CA1510703_004_004-20190917063515.0 ppb
2019-09-17CA1510703_017_017-2019091707409.20 ppb
2019-10-09CA1510703_002_002-201910090700ND
2019-10-09CA1510703_004_004-20191009073515.0 ppb
2019-10-09CA1510703_013_013-2019100908053.70 ppb
2019-10-09CA1510703_017_017-2019100908309.20 ppb
2019-11-06CA1510703_017_017-2019110608057.20 ppb
2019-11-06CA1510703_002_002-201911060705ND
2019-11-06CA1510703_013_013-2019110607453.00 ppb
2019-11-06CA1510703_004_004-20191106073017.0 ppb
2019-12-10CA1510703_004_004-20191210074014.0 ppb
2019-12-10CA1510703_017_017-2019121008256.00 ppb
2019-12-10CA1510703_002_002-201912100705ND
2019-12-10CA1510703_013_013-2019121008052.90 ppb
2020-01-08CA1510703_017_017-2020010808158.70 ppb
2020-01-08CA1510703_002_002-202001080710ND
2020-01-08CA1510703_013_013-2020010807554.00 ppb
2020-01-08CA1510703_004_004-20200108074018.0 ppb
2020-02-05CA1510703_017_017-2020020512005.20 ppb
2020-02-05CA1510703_017_017-2020020513005.20 ppb
2020-02-05CA1510703_002_002-2020020511352.70 ppb
2020-02-05CA1510703_013_013-2020020512253.60 ppb
2020-02-05CA1510703_004_004-20200205120017.0 ppb
2020-03-04CA1510703_002_002-202003040705ND
2020-03-04CA1510703_004_004-20200304073517.0 ppb
2020-03-04CA1510703_017_017-2020030407359.00 ppb
2020-03-04CA1510703_013_013-2020030408002.90 ppb
2020-04-07CA1510703_017_017-20200407082011.0 ppb
2020-04-07CA1510703_002_002-2020040707102.40 ppb
2020-04-07CA1510703_004_004-20200407074017.0 ppb
2020-04-07CA1510703_013_013-2020040708003.50 ppb
2020-05-06CA1510703_013_013-202005061005ND
2020-05-06CA1510703_002_002-202005060905ND
2020-05-06CA1510703_004_004-20200506094014.0 ppb
2020-05-06CA1510703_017_017-20200506103010.00 ppb
2020-06-03CA1510703_002_002-202006030705ND
2020-06-03CA1510703_004_004-20200603082015.0 ppb
2020-06-03CA1510703_017_017-2020060307503.00 ppb
2020-06-03CA1510703_013_013-2020060307302.80 ppb
2020-07-08CA1510703_013_013-2020070807452.40 ppb
2020-07-08CA1510703_017_017-2020070808059.00 ppb
2020-07-08CA1510703_004_004-20200708084515.0 ppb
2020-07-08CA1510703_002_002-202007080720ND
2020-08-05CA1510703_013_013-2020080508303.40 ppb
2020-08-05CA1510703_004_004-20200805085514.0 ppb
2020-08-05CA1510703_002_002-202008050710ND
2020-08-05CA1510703_017_017-2020080507357.20 ppb
2020-09-02CA1510703_013_013-2020090208103.60 ppb
2020-09-02CA1510703_017_017-2020090208256.10 ppb
2020-09-02CA1510703_002_002-202009020710ND
2020-09-02CA1510703_004_004-20200902074513.0 ppb
2020-09-16CA1510703_013_013-2020091609002.70 ppb
2020-09-16CA1510703_002_002-202009160820ND
2020-09-16CA1510703_004_004-20200916084513.0 ppb
2020-09-16CA1510703_017_017-2020091610005.10 ppb
2020-10-07CA1510703_013_013-2020100707503.90 ppb
2020-10-07CA1510703_017_017-2020100708155.70 ppb
2020-10-07CA1510703_004_004-20201007090012.0 ppb
2020-10-07CA1510703_002_002-202010070730ND
2020-11-10CA1510703_002_002-202011100900ND
2020-11-10CA1510703_004_004-20201110101514.0 ppb
2020-11-10CA1510703_013_013-2020111009253.20 ppb
2020-11-10CA1510703_017_017-2020111009407.40 ppb
2020-12-08CA1510703_004_004-20201208082513.0 ppb
2020-12-08CA1510703_017_017-2020120807407.80 ppb
2020-12-08CA1510703_002_002-202012080700ND
2020-12-08CA1510703_013_013-2020120807203.00 ppb
2021-01-05CA1510703_002_002-202101050730ND
2021-01-05CA1510703_017_017-2021010508358.30 ppb
2021-01-05CA1510703_004_004-20210105082015.0 ppb
2021-01-05CA1510703_013_013-2021010508003.20 ppb
2021-02-02CA1510703_004_004-20210202094015.0 ppb
2021-02-02CA1510703_013_013-2021020209102.90 ppb
2021-02-02CA1510703_017_017-2021020208459.50 ppb
2021-02-02CA1510703_002_002-202102021005ND
2021-03-09CA1510703_013_013-2021030909053.40 ppb
2021-03-09CA1510703_002_002-2021030909552.10 ppb
2021-03-09CA1510703_004_004-20210309092513.0 ppb
2021-03-09CA1510703_017_017-2021030908404.90 ppb
2021-04-06CA1510703_013_013-2021040609153.50 ppb
2021-04-06CA1510703_017_017-2021040608559.60 ppb
2021-04-06CA1510703_002_002-202104061005ND
2021-04-06CA1510703_004_004-20210406093514.0 ppb
2021-05-04CA1510703_004_004-20210504093014.0 ppb
2021-05-04CA1510703_017_017-2021050408508.60 ppb
2021-05-04CA1510703_013_013-2021050409103.10 ppb
2021-05-04CA1510703_002_002-202105041000ND
2021-06-08CA1510703_004_004-20210608092511.0 ppb
2021-06-08CA1510703_017_017-2021060809006.30 ppb
2021-06-08CA1510703_002_002-202106080820ND
2021-06-08CA1510703_013_013-2021060808353.50 ppb
2021-06-15CA1510703_015_015-2021061509453.10 ppb
2021-07-13CA1510703_004_004-20210713091514.0 ppb
2021-07-13CA1510703_013_013-2021071308253.30 ppb
2021-07-13CA1510703_002_002-202107130805ND
2021-07-13CA1510703_017_017-2021071308457.70 ppb
2021-08-10CA1510703_017_017-2021081008006.60 ppb
2021-08-10CA1510703_004_004-2021081008405.20 ppb
2021-08-10CA1510703_013_013-2021081008253.10 ppb
2021-08-16CA1510703_015_015-2021081610302.20 ppb
2021-08-16CA1510703_002_002-2021081611002.00 ppb
2021-09-14CA1510703_004_004-20210914103012.0 ppb
2021-09-14CA1510703_013_013-2021091409002.80 ppb
2021-09-14CA1510703_017_017-2021091410006.10 ppb
2021-09-14CA1510703_002_002-202109140925ND
2021-09-14CA1510703_015_015-2021091408352.80 ppb
2021-10-05CA1510703_002_002-202110051000ND
2021-10-05CA1510703_004_004-20211005083512.0 ppb
2021-10-05CA1510703_013_013-2021100509352.90 ppb
2021-10-05CA1510703_015_015-2021100509202.40 ppb
2021-10-05CA1510703_017_017-2021100508506.30 ppb
2021-11-09CA1510703_002_002-202111091005ND
2021-11-09CA1510703_004_004-20211109083014.0 ppb
2021-11-09CA1510703_013_013-2021110909402.90 ppb
2021-11-09CA1510703_017_017-2021110908505.10 ppb
2021-11-09CA1510703_015_015-2021110909252.50 ppb
2021-12-07CA1510703_002_002-202112071015ND
2021-12-07CA1510703_013_013-2021120709503.20 ppb
2021-12-07CA1510703_015_015-2021120709402.40 ppb
2021-12-07CA1510703_004_004-20211207084513.0 ppb
2021-12-07CA1510703_017_017-2021120709004.90 ppb
2022-01-11CA1510703_002_002-202201111020ND
2022-01-11CA1510703_013_013-2022011109552.90 ppb
2022-01-11CA1510703_015_015-2022011109352.50 ppb
2022-01-11CA1510703_017_017-2022011109007.40 ppb
2022-01-11CA1510703_004_004-20220111084512.0 ppb
2022-02-08CA1510703_002_002-202202081015ND
2022-02-08CA1510703_004_004-20220208084512.0 ppb
2022-02-08CA1510703_015_015-2022020809352.40 ppb
2022-02-08CA1510703_017_017-2022020809056.90 ppb
2022-02-08CA1510703_013_013-2022020809502.70 ppb
2022-03-01CA1510703_004_004-20220301084012.0 ppb
2022-03-01CA1510703_017_017-2022030108557.10 ppb
2022-03-01CA1510703_002_002-202203011005ND
2022-03-01CA1510703_013_013-2022030109452.90 ppb
2022-03-01CA1510703_015_015-2022030109302.50 ppb
2022-04-05CA1510703_004_004-20220405084013.0 ppb
2022-04-05CA1510703_017_017-2022040508504.40 ppb
2022-04-05CA1510703_002_002-202204051000ND
2022-04-05CA1510703_013_013-2022040509403.20 ppb
2022-04-05CA1510703_015_015-2022040509252.60 ppb
2022-05-03CA1510703_017_017-2022050309057.70 ppb
2022-05-03CA1510703_013_013-2022050309553.20 ppb
2022-05-03CA1510703_015_015-2022050309352.70 ppb
2022-05-03CA1510703_002_002-2022050310152.00 ppb
2022-05-03CA1510703_004_004-20220503085513.0 ppb
2022-06-07CA1510703_002_002-202206071000ND
2022-06-07CA1510703_004_004-20220607083512.0 ppb
2022-06-07CA1510703_017_017-2022060708506.60 ppb
2022-06-07CA1510703_015_015-2022060709202.00 ppb
2022-06-07CA1510703_013_013-2022060709352.70 ppb
2022-06-28CA1510703_043_043-2022062809003.50 ppb
2022-07-05CA1510703_004_004-2022070508357.80 ppb
2022-07-05CA1510703_013_013-2022070509402.90 ppb
2022-07-05CA1510703_015_015-2022070509202.50 ppb
2022-07-05CA1510703_002_002-202207051000ND
2022-07-05CA1510703_017_017-2022070508558.70 ppb
2022-08-02CA1510703_002_002-202208021027ND
2022-08-02CA1510703_004_004-20220802090811.0 ppb
2022-08-02CA1510703_015_015-2022080209542.50 ppb
2022-08-02CA1510703_013_013-2022080210043.80 ppb
2022-08-02CA1510703_017_017-2022080209244.40 ppb
2022-09-06CA1510703_013_013-2022090609153.30 ppb
2022-09-06CA1510703_015_015-2022090609032.50 ppb
2022-09-06CA1510703_017_017-2022090608486.90 ppb
2022-09-06CA1510703_002_002-202209061000ND
2022-09-06CA1510703_004_004-20220906095312.0 ppb
2022-10-04CA1510703_002_002-202210041018ND
2022-10-04CA1510703_013_013-2022100409573.00 ppb
2022-10-04CA1510703_017_017-2022100409096.20 ppb
2022-10-04CA1510703_004_004-2022100408529.60 ppb
2022-10-04CA1510703_015_015-2022100409412.40 ppb
2022-11-01CA1510703_004_004-20221101085811.0 ppb
2022-11-01CA1510703_002_002-202211011031ND
2022-11-01CA1510703_013_013-2022110110132.50 ppb
2022-11-01CA1510703_015_015-2022110109562.40 ppb
2022-11-01CA1510703_043_043-202211011014ND
2022-11-01CA1510703_017_017-2022110109166.60 ppb
2022-12-06CA1510703_002_002-202212060952ND
2022-12-06CA1510703_013_013-2022120609034.00 ppb
2022-12-06CA1510703_017_017-2022120609278.50 ppb
2022-12-06CA1510703_043_043-202212061007ND
2022-12-06CA1510703_004_004-2022120608008.40 ppb
2022-12-06CA1510703_015_015-2022120608432.70 ppb
2023-01-03CA1510703_013_013-2023010308453.40 ppb
2023-01-03CA1510703_043_043-202301030805ND
2023-01-03CA1510703_015_015-2023010308592.60 ppb
2023-01-03CA1510703_004_004-20230103094912.0 ppb
2023-01-03CA1510703_002_002-202301030820ND
2023-01-03CA1510703_017_017-2023010309174.40 ppb
2023-02-07CA1510703_004_004-20230207073412.0 ppb
2023-02-07CA1510703_043_043-202302070917ND
2023-02-07CA1510703_015_015-2023020708242.40 ppb
2023-02-07CA1510703_017_017-2023020707568.10 ppb
2023-02-07CA1510703_002_002-202302070901ND
2023-02-07CA1510703_013_013-2023020708402.90 ppb
2023-03-07CA1510703_004_004-20230307075013.0 ppb
2023-03-07CA1510703_015_015-2023030708432.90 ppb
2023-03-07CA1510703_017_017-2023030708067.10 ppb
2023-03-07CA1510703_043_043-202303070939ND
2023-03-07CA1510703_013_013-2023030709003.00 ppb
2023-03-07CA1510703_002_002-202303070920ND
2023-04-04CA1510703_013_013-2023040408493.50 ppb
2023-04-04CA1510703_002_002-202304040910ND
2023-04-04CA1510703_015_015-2023040408312.70 ppb
2023-04-04CA1510703_017_017-2023040407557.50 ppb
2023-04-04CA1510703_004_004-20230404073813.0 ppb
2023-04-04CA1510703_043_043-202304040927ND
2023-05-02CA1510703_017_017-2023050207507.80 ppb
2023-05-02CA1510703_013_013-2023050208483.60 ppb
2023-05-02CA1510703_043_043-202305020929ND
2023-05-02CA1510703_002_002-202305021640ND
2023-05-02CA1510703_004_004-20230502072812.0 ppb
2023-05-02CA1510703_015_015-2023050208272.80 ppb
2023-06-05CA1510703_004_004-20230605071912.0 ppb
2023-06-05CA1510703_015_015-2023060508082.60 ppb
2023-06-05CA1510703_017_017-2023060507377.70 ppb
2023-06-05CA1510703_043_043-202306050903ND
2023-06-05CA1510703_002_002-202306050844ND
2023-06-05CA1510703_013_013-2023060508243.00 ppb
2023-07-11CA1510703_017_017-2023071109526.20 ppb
2023-07-11CA1510703_002_002-202307110915ND
2023-07-11CA1510703_004_004-20230711093910.00 ppb
2023-07-11CA1510703_013_013-2023071110213.50 ppb
2023-07-11CA1510703_015_015-2023071110312.60 ppb
2023-07-11CA1510703_043_043-202307110850ND
2023-08-01CA1510703_002_002-202308010911ND
2023-08-01CA1510703_013_013-2023080108393.10 ppb
2023-08-01CA1510703_004_004-2023080107357.80 ppb
2023-08-01CA1510703_015_015-2023080108222.30 ppb
2023-08-01CA1510703_017_017-2023080107487.70 ppb
2023-08-01CA1510703_043_043-202308010927ND
2023-09-12CA1510703_002_002-202309120908ND
2023-09-12CA1510703_013_013-2023091208363.00 ppb
2023-09-12CA1510703_017_017-2023091207468.80 ppb
2023-09-12CA1510703_043_043-202309120922ND
2023-09-12CA1510703_004_004-2023091207299.70 ppb
2023-09-12CA1510703_015_015-2023091208203.10 ppb
2023-10-03CA1510703_004_004-20231003071912.0 ppb
2023-10-03CA1510703_015_015-2023100308272.30 ppb
2023-10-03CA1510703_013_013-2023100308342.70 ppb
2023-10-03CA1510703_017_017-2023100307367.40 ppb
2023-10-03CA1510703_043_043-202310030923ND
2023-10-03CA1510703_002_002-202310030905ND
2023-11-07CA1510703_004_004-20231107071713.0 ppb
2023-11-07CA1510703_015_015-2023110708072.50 ppb
2023-11-07CA1510703_043_043-202311070917ND
2023-11-07CA1510703_002_002-202311070901ND
2023-11-07CA1510703_004_004-20231107070511.0 ppb
2023-11-07CA1510703_017_017-2023110707285.70 ppb
2023-11-07CA1510703_017_017-2023110707328.70 ppb
2023-11-07CA1510703_002_002-202311070855ND
2023-11-07CA1510703_013_013-2023110708242.50 ppb
2023-11-07CA1510703_043_043-202311070913ND
2023-11-07CA1510703_013_013-2023110708192.60 ppb
2023-11-07CA1510703_015_015-2023110707592.60 ppb
2023-12-05CA1510703_017_017-2023120507314.10 ppb
2023-12-05CA1510703_002_002-202312050856ND
2023-12-05CA1510703_015_015-2023120508012.10 ppb
2023-12-05CA1510703_004_004-20231205071211.0 ppb
2023-12-05CA1510703_043_043-202312050913ND
2023-12-05CA1510703_013_013-2023120508162.20 ppb