Know Your Environment. Protect Your Health.

Arsenic

Cws - Upper Bodfish Water System

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.

 

228

Samples

122

Samples exceeding legal limit (MCL)

148

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201811.8 ppb3520ND - 31.6 ppb
201913.2 ppb3823ND - 33.1 ppb
202012.4 ppb3623ND - 30.8 ppb
202110.9 ppb3220ND - 33.0 ppb
202213.9 ppb5237ND - 28.7 ppb
202311.2 ppb3525ND - 28.0 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
2018-01-17CA1510026_007_007-201801171059ND
2018-01-17CA1510026_006_006-20180117110414.2 ppb
2018-02-21CA1510026_004_004-2018022113348.58 ppb
2018-02-21CA1510026_006_006-20180221131414.4 ppb
2018-02-21CA1510026_007_007-201802211325ND
2018-02-21CA1510026_005_005-20180221134324.0 ppb
2018-03-13CA1510026_006_006-20180313130027.4 ppb
2018-03-13CA1510026_007_007-201803131316ND
2018-04-04CA1510026_007_007-201804041042ND
2018-04-04CA1510026_006_006-20180404101720.9 ppb
2018-05-31CA1510026_005_005-20180531132731.6 ppb
2018-05-31CA1510026_006_006-20180531130322.9 ppb
2018-05-31CA1510026_004_004-20180531132212.0 ppb
2018-05-31CA1510026_007_007-201805311333ND
2018-06-12CA1510026_006_006-20180612142221.7 ppb
2018-06-12CA1510026_007_007-201806121429ND
2018-07-16CA1510026_006_006-20180716130621.2 ppb
2018-07-16CA1510026_007_007-201807161325ND
2018-08-01CA1510026_004_004-20180801135622.7 ppb
2018-08-01CA1510026_006_006-20180801122519.5 ppb
2018-08-01CA1510026_005_005-20180801140127.2 ppb
2018-08-01CA1510026_007_007-201808011408ND
2018-08-08CA1510026_007_007-201808081446ND
2018-08-13CA1510026_DST_902-201808131227ND
2018-08-13CA1510026_DST_901-201808131219ND
2018-09-06CA1510026_006_006-20180906133118.1 ppb
2018-09-06CA1510026_007_007-201809061336ND
2018-10-08CA1510026_006_006-20181008122916.4 ppb
2018-10-08CA1510026_007_007-201810081224ND
2018-11-14CA1510026_005_005-20181114132828.6 ppb
2018-11-14CA1510026_006_006-20181114133529.5 ppb
2018-11-14CA1510026_004_004-2018111413227.90 ppb
2018-11-14CA1510026_007_007-201811141347ND
2018-12-10CA1510026_006_006-20181210110523.5 ppb
2018-12-10CA1510026_007_007-201812101100ND
2019-01-22CA1510026_006_006-20190122110221.8 ppb
2019-01-22CA1510026_007_007-201901221110ND
2019-02-06CA1510026_007_007-201902061227ND
2019-02-06CA1510026_006_006-20190206123622.5 ppb
2019-02-06CA1510026_005_005-20190206125527.8 ppb
2019-02-06CA1510026_004_004-2019020612459.87 ppb
2019-02-25CA1510026_005_005-20190225121026.0 ppb
2019-02-25CA1510026_004_004-20190225120011.0 ppb
2019-03-06CA1510026_007_007-201903061455ND
2019-03-27CA1510026_007_007-201903271045ND
2019-04-09CA1510026_007_007-201904091343ND
2019-04-09CA1510026_006_006-20190409132024.1 ppb
2019-05-06CA1510026_006_006-20190506112821.1 ppb
2019-05-06CA1510026_007_007-201905061133ND
2019-05-06CA1510026_004_004-2019050611208.60 ppb
2019-05-06CA1510026_005_005-20190506112527.0 ppb
2019-06-05CA1510026_006_006-20190605120026.8 ppb
2019-06-05CA1510026_007_007-201906051153ND
2019-07-22CA1510026_006_006-20190722111526.9 ppb
2019-07-22CA1510026_007_007-201907221120ND
2019-08-07CA1510026_005_005-20190807134027.9 ppb
2019-08-07CA1510026_007_007-201908071345ND
2019-08-07CA1510026_006_006-20190807133329.2 ppb
2019-09-11CA1510026_006_006-20190911094016.0 ppb
2019-09-11CA1510026_007_007-201909110950ND
2019-10-15CA1510026_007_007-201910151215ND
2019-10-16CA1510026_006_006-20191016124519.7 ppb
2019-10-16CA1510026_007_007-201910161248ND
2019-11-13CA1510026_007_007-201911130945ND
2019-11-13CA1510026_004_004-20191113093910.1 ppb
2019-11-13CA1510026_005_005-20191113094133.1 ppb
2019-11-13CA1510026_006_006-20191113093630.7 ppb
2019-11-19CA1510026_007_007-201911191352ND
2019-11-19CA1510026_005_005-20191119134829.7 ppb
2019-11-19CA1510026_004_004-2019111913459.08 ppb
2019-11-19CA1510026_006_006-20191119135016.7 ppb
2019-12-04CA1510026_007_007-201912041240ND
2019-12-04CA1510026_006_006-20191204124626.8 ppb
2020-01-13CA1510026_007_007-202001131200ND
2020-01-13CA1510026_006_006-20200113120523.5 ppb
2020-02-04CA1510026_007_007-202002041250ND
2020-02-04CA1510026_004_004-2020020413039.57 ppb
2020-02-04CA1510026_006_006-20200204125718.9 ppb
2020-02-04CA1510026_005_005-20200204131029.6 ppb
2020-03-11CA1510026_006_006-20200311142917.8 ppb
2020-03-11CA1510026_007_007-202003111424ND
2020-04-01CA1510026_006_006-20200401134516.8 ppb
2020-04-01CA1510026_007_007-202004011333ND
2020-05-06CA1510026_006_006-20200506075922.0 ppb
2020-05-06CA1510026_004_004-2020050608118.11 ppb
2020-05-06CA1510026_005_005-20200506081629.0 ppb
2020-05-06CA1510026_007_007-202005060748ND
2020-06-08CA1510026_007_007-202006081115ND
2020-06-08CA1510026_006_006-20200608112518.6 ppb
2020-07-20CA1510026_007_007-202007201303ND
2020-07-20CA1510026_006_006-20200720125517.1 ppb
2020-08-05CA1510026_005_005-20200805120128.7 ppb
2020-08-05CA1510026_007_007-202008051121ND
2020-08-05CA1510026_004_004-2020080511559.00 ppb
2020-08-05CA1510026_006_006-20200805115018.2 ppb
2020-08-18CA1510026_005_005-20200818101129.3 ppb
2020-08-18CA1510026_004_004-2020081810077.60 ppb
2020-08-18CA1510026_006_006-20200818100218.5 ppb
2020-08-18CA1510026_007_007-202008180955ND
2020-09-02CA1510026_006_006-20200902120921.0 ppb
2020-09-02CA1510026_007_007-202009021202ND
2020-10-20CA1510026_006_006-20201020112922.8 ppb
2020-10-20CA1510026_007_007-202010201139ND
2020-11-12CA1510026_004_004-20201112114211.3 ppb
2020-11-12CA1510026_005_005-20201112121330.8 ppb
2020-11-12CA1510026_006_006-20201112113618.8 ppb
2020-11-12CA1510026_007_007-202011121218ND
2020-12-09CA1510026_006_006-20201209111220.1 ppb
2020-12-09CA1510026_007_007-202012091118ND
2021-01-12CA1510026_006_006-20210112093116.1 ppb
2021-01-12CA1510026_007_007-202101120942ND
2021-02-04CA1510026_004_004-2021020412148.80 ppb
2021-02-04CA1510026_005_005-20210204121826.0 ppb
2021-02-04CA1510026_007_007-202102041207ND
2021-02-04CA1510026_006_006-20210204115214.0 ppb
2021-03-02CA1510026_006_006-20210302082315.0 ppb
2021-03-02CA1510026_007_007-202103020814ND
2021-04-06CA1510026_007_007-202104061252ND
2021-04-06CA1510026_006_006-20210406115519.0 ppb
2021-05-04CA1510026_006_006-20210504134920.0 ppb
2021-05-04CA1510026_004_004-2021050414002.40 ppb
2021-05-04CA1510026_005_005-20210504140533.0 ppb
2021-05-04CA1510026_007_007-202105041342ND
2021-06-01CA1510026_007_007-202106011343ND
2021-06-01CA1510026_006_006-20210601134921.0 ppb
2021-07-13CA1510026_006_006-20210713114316.0 ppb
2021-07-13CA1510026_007_007-202107131158ND
2021-08-05CA1510026_004_004-2021080513428.80 ppb
2021-08-05CA1510026_005_005-20210805134726.0 ppb
2021-08-05CA1510026_006_006-20210805133117.0 ppb
2021-08-05CA1510026_007_007-202108051336ND
2021-09-23CA1510026_007_007-202109231341ND
2021-09-23CA1510026_006_006-20210923133415.0 ppb
2021-10-07CA1510026_006_006-20211007144218.0 ppb
2021-10-07CA1510026_007_007-202110071434ND
2021-11-18CA1510026_004_004-20211118113811.0 ppb
2021-11-18CA1510026_005_005-20211118114328.0 ppb
2021-11-18CA1510026_006_006-20211118112117.0 ppb
2021-11-18CA1510026_007_007-202111181126ND
2021-12-07CA1510026_007_007-202112071327ND
2021-12-07CA1510026_006_006-20211207132116.0 ppb
2022-01-11CA1510026_004_004-20220111101110.00 ppb
2022-01-11CA1510026_005_005-20220111101728.0 ppb
2022-01-18CA1510026_006_006-20220118133916.0 ppb
2022-01-18CA1510026_007_007-202201181324ND
2022-02-17CA1510026_004_004-2022021709208.70 ppb
2022-02-17CA1510026_006_006-20220217093217.0 ppb
2022-02-17CA1510026_007_007-202202170956ND
2022-02-17CA1510026_004_004-2022021709209.40 ppb
2022-02-17CA1510026_005_005-20220217095026.0 ppb
2022-02-24CA1510026_005_005-20220224114427.0 ppb
2022-03-08CA1510026_004_004-20220308112010.00 ppb
2022-03-08CA1510026_006_006-20220308111616.0 ppb
2022-03-08CA1510026_005_005-20220308112327.0 ppb
2022-03-08CA1510026_007_007-202203081107ND
2022-03-15CA1510026_006_006-20220315092715.0 ppb
2022-03-15CA1510026_007_007-2022031509321.80 ppb
2022-04-06CA1510026_006_006-20220406142021.5 ppb
2022-04-06CA1510026_007_007-202204061425ND
2022-04-19CA1510026_005_005-20220419130626.0 ppb
2022-04-19CA1510026_006_006-20220419131718.9 ppb
2022-04-19CA1510026_004_004-2022041913029.80 ppb
2022-04-19CA1510026_007_007-202204191312ND
2022-05-03CA1510026_004_004-20220503115910.4 ppb
2022-05-03CA1510026_005_005-20220503120427.2 ppb
2022-05-03CA1510026_006_006-20220503115325.0 ppb
2022-05-03CA1510026_006_006-20220503115325.6 ppb
2022-05-03CA1510026_005_005-20220503120427.1 ppb
2022-05-03CA1510026_004_004-2022050311599.90 ppb
2022-05-03CA1510026_007_007-202205031143ND
2022-05-03CA1510026_007_007-202205031143ND
2022-06-01CA1510026_006_006-20220601114925.1 ppb
2022-06-01CA1510026_007_007-202206011143ND
2022-06-01CA1510026_006_006-20220601114924.9 ppb
2022-07-13CA1510026_006_006-20220713134925.9 ppb
2022-07-13CA1510026_007_007-202207131404ND
2022-07-13CA1510026_006_006-20220713134928.7 ppb
2022-08-10CA1510026_006_006-20220810140025.4 ppb
2022-08-10CA1510026_005_005-20220810141125.2 ppb
2022-08-10CA1510026_007_007-202208101424ND
2022-08-10CA1510026_004_004-2022081014067.50 ppb
2022-08-10CA1510026_006_006-20220810140025.6 ppb
2022-09-14CA1510026_006_006-20220914090223.0 ppb
2022-09-14CA1510026_007_007-202209140910ND
2022-10-06CA1510026_007_007-202210061047ND
2022-10-11CA1510026_006_006-20221011132720.8 ppb
2022-10-11CA1510026_007_007-202210111320ND
2022-11-08CA1510026_004_004-2022110813097.40 ppb
2022-11-08CA1510026_007_007-202211081254ND
2022-11-08CA1510026_005_005-20221108131524.0 ppb
2022-11-08CA1510026_006_006-20221108130119.0 ppb
2022-12-06CA1510026_007_007-202212061115ND
2022-12-06CA1510026_006_006-20221206112224.4 ppb
2023-01-17CA1510026_007_007-202301171100ND
2023-01-18CA1510026_006_006-20230118105223.0 ppb
2023-02-01CA1510026_007_007-202302011515ND
2023-02-06CA1510026_005_005-20230206121726.0 ppb
2023-02-06CA1510026_005_005-20230206121726.2 ppb
2023-02-06CA1510026_006_006-20230206120620.8 ppb
2023-02-06CA1510026_006_006-20230206120620.8 ppb
2023-02-06CA1510026_004_004-2023020612179.60 ppb
2023-02-06CA1510026_007_007-202302061158ND
2023-03-06CA1510026_006_006-20230306095413.9 ppb
2023-03-06CA1510026_007_007-202303061010ND
2023-04-11CA1510026_006_006-20230411135612.8 ppb
2023-04-12CA1510026_007_007-202304121220ND
2023-05-08CA1510026_005_005-20230508114423.9 ppb
2023-05-08CA1510026_006_006-20230508112714.0 ppb
2023-05-08CA1510026_004_004-2023050811408.80 ppb
2023-05-08CA1510026_007_007-202305081135ND
2023-06-06CA1510026_006_006-20230606114715.8 ppb
2023-06-06CA1510026_007_007-202306061152ND
2023-07-11CA1510026_007_007-202307111418ND
2023-07-12CA1510026_006_006-20230712114513.8 ppb
2023-08-09CA1510026_004_004-20230809133311.0 ppb
2023-08-09CA1510026_005_005-20230809133623.4 ppb
2023-08-09CA1510026_006_006-20230809132315.4 ppb
2023-08-09CA1510026_007_007-2023080913471.10 ppb
2023-09-05CA1510026_007_007-202309051311ND
2023-09-05CA1510026_006_006-20230905130316.0 ppb
2023-10-03CA1510026_007_007-2023100310502.10 ppb
2023-10-03CA1510026_006_006-20231003105517.0 ppb
2023-11-06CA1510026_006_006-20231106143618.7 ppb
2023-11-13CA1510026_004_004-20231113113510.3 ppb
2023-11-13CA1510026_005_005-20231113114028.0 ppb
2023-11-13CA1510026_007_007-2023111311301.80 ppb
2023-12-13CA1510026_007_007-202312131400ND
2023-12-13CA1510026_006_006-20231213141017.0 ppb