Know Your Environment. Protect Your Health.

Arsenic

Fcwwd #41/shaver Lake

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.

 

202

Samples

0

Samples exceeding legal limit (MCL)

15

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.673 ppb404ND - 9.90 ppb
20191.02 ppb316ND - 7.60 ppb
20200.568 ppb344ND - 5.40 ppb
2021ND380ND
20220.0818 ppb331ND - 2.70 ppb
2023ND260ND

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
2018-03-12CA1010017_001_001-201803121055ND
2018-03-12CA1010017_015_015-201803121341ND
2018-03-12CA1010017_005_005-201803121119ND
2018-03-12CA1010017_008_008-201803121200ND
2018-03-12CA1010017_014_014-201803121310ND
2018-03-12CA1010017_033_033-201803121239ND
2018-03-14CA1010017_004_004-201803141053ND
2018-03-14CA1010017_034_034-201803140320ND
2018-03-14CA1010017_062_062-201803141234ND
2018-03-16CA1010017_011_011-201803161212ND
2018-03-16CA1010017_012_012-201803161225ND
2018-03-16CA1010017_036_036-201803161304ND
2018-03-16CA1010017_006_006-201803161041ND
2018-03-16CA1010017_035_035-201803161334ND
2018-03-19CA1010017_044_044-2018031912515.70 ppb
2018-03-19CA1010017_009_009-201803191332ND
2018-03-19CA1010017_042_042-201803191207ND
2018-04-04CA1010017_044_044-2018040411295.40 ppb
2018-04-09CA1010017_033_033-201804091159ND
2018-04-09CA1010017_001_001-201804091058ND
2018-04-09CA1010017_004_004-201804091113ND
2018-04-09CA1010017_005_005-201804091117ND
2018-04-11CA1010017_008_008-201804111212ND
2018-04-11CA1010017_006_006-201804111318ND
2018-04-13CA1010017_062_062-201804131313ND
2018-04-13CA1010017_034_034-201804131345ND
2018-04-13CA1010017_014_014-201804131404ND
2018-04-13CA1010017_015_015-201804131040ND
2018-04-18CA1010017_011_011-201804181135ND
2018-04-18CA1010017_012_012-201804181148ND
2018-04-18CA1010017_036_036-201804181054ND
2018-04-18CA1010017_035_035-201804181037ND
2018-04-20CA1010017_009_009-201804201329ND
2018-04-20CA1010017_042_042-201804201155ND
2018-06-18CA1010017_044_044-2018061807525.90 ppb
2018-07-11CA1010017_070_070-201807111135ND
2018-07-11CA1010017_071_071-201807111052ND
2018-09-12CA1010017_044_044-2018091210009.90 ppb
2018-11-06CA1010017_070_070-201811061225ND
2018-11-06CA1010017_071_071-201811061030ND
2019-01-09CA1010017_071_071-201901091225ND
2019-01-09CA1010017_070_070-201901091140ND
2019-01-15CA1010017_037_037-2019011511396.80 ppb
2019-02-13CA1010017_070_070-201902131017ND
2019-02-13CA1010017_071_071-201902131145ND
2019-03-27CA1010017_044_044-2019032710203.60 ppb
2019-04-03CA1010017_071_071-201904030800ND
2019-04-03CA1010017_070_070-201904030915ND
2019-05-08CA1010017_070_070-201905081045ND
2019-05-08CA1010017_071_071-201905081010ND
2019-06-11CA1010017_070_070-201906111110ND
2019-06-11CA1010017_071_071-201906111035ND
2019-06-19CA1010017_040_040-201906191115ND
2019-06-19CA1010017_037_037-201906191030ND
2019-06-19CA1010017_041_041-201906191120ND
2019-06-19CA1010017_044_044-2019061913207.60 ppb
2019-06-19CA1010017_046_046-201906191000ND
2019-06-19CA1010017_058_058-201906190855ND
2019-06-19CA1010017_065_065-201906190940ND
2019-06-19CA1010017_059_059-201906190955ND
2019-06-19CA1010017_066_066-201906190957ND
2019-06-19CA1010017_043_043-201906191310ND
2019-06-19CA1010017_056_056-201906190926ND
2019-06-19CA1010017_057_057-201906190910ND
2019-06-26CA1010017_066_066-201906261230ND
2019-07-02CA1010017_071_071-201907020920ND
2019-07-02CA1010017_070_070-201907021015ND
2019-07-23CA1010017_044_044-2019072311305.20 ppb
2019-10-14CA1010017_044_044-2019101412154.10 ppb
2019-11-05CA1010017_044_044-2019110512264.20 ppb
2019-12-18CA1010017_038_038-201912180933ND
2020-02-04CA1010017_071_071-202002041110ND
2020-02-04CA1010017_070_070-202002041120ND
2020-02-26CA1010017_044_044-2020022611154.50 ppb
2020-03-10CA1010017_070_070-202003101100ND
2020-03-10CA1010017_071_071-202003100910ND
2020-04-02CA1010017_071_071-202004021015ND
2020-04-02CA1010017_070_070-202004021030ND
2020-04-21CA1010017_002_002-202004210850ND
2020-05-06CA1010017_048_048-202005060920ND
2020-05-06CA1010017_047_047-202005061050ND
2020-05-06CA1010017_049_049-202005061025ND
2020-05-12CA1010017_070_070-202005121045ND
2020-05-12CA1010017_071_071-202005121020ND
2020-05-27CA1010017_070_070-202005271010ND
2020-05-27CA1010017_071_071-202005270950ND
2020-06-02CA1010017_070_070-202006021040ND
2020-06-02CA1010017_071_071-202006021015ND
2020-06-10CA1010017_071_071-202006101020ND
2020-06-10CA1010017_070_070-202006101120ND
2020-06-22CA1010017_044_044-2020062212005.40 ppb
2020-07-01CA1010017_070_070-202007011100ND
2020-07-01CA1010017_071_071-202007011030ND
2020-08-04CA1010017_071_071-202008040930ND
2020-08-04CA1010017_070_070-202008041130ND
2020-08-12CA1010017_044_044-2020081212304.80 ppb
2020-09-01CA1010017_070_070-202009010945ND
2020-09-01CA1010017_071_071-202009011100ND
2020-10-13CA1010017_070_070-202010131055ND
2020-10-13CA1010017_071_071-202010130959ND
2020-11-02CA1010017_071_071-202011021129ND
2020-11-02CA1010017_070_070-202011021215ND
2020-12-08CA1010017_044_044-2020120813104.60 ppb
2020-12-08CA1010017_071_071-202012081235ND
2020-12-08CA1010017_070_070-202012081320ND
2021-01-04CA1010017_070_070-202101041120ND
2021-01-04CA1010017_071_071-202101041042ND
2021-02-08CA1010017_071_071-202102081100ND
2021-02-08CA1010017_070_070-202102081230ND
2021-03-08CA1010017_009_009-202103081140ND
2021-03-08CA1010017_001_001-202103081300ND
2021-03-10CA1010017_070_070-202103101230ND
2021-03-10CA1010017_071_071-202103101140ND
2021-04-05CA1010017_006_006-202104050900ND
2021-04-05CA1010017_004_004-202104051120ND
2021-04-05CA1010017_008_008-202104051100ND
2021-04-06CA1010017_042_042-202104061230ND
2021-04-06CA1010017_070_070-202104060930ND
2021-04-06CA1010017_071_071-202104060920ND
2021-04-06CA1010017_011_011-202104061245ND
2021-04-06CA1010017_012_012-202104061300ND
2021-04-12CA1010017_014_014-202104121400ND
2021-04-12CA1010017_015_015-202104121345ND
2021-04-13CA1010017_034_034-202104131155ND
2021-04-13CA1010017_062_062-202104131300ND
2021-04-14CA1010017_005_005-202104141326ND
2021-04-14CA1010017_033_033-202104141300ND
2021-04-19CA1010017_036_036-202104191055ND
2021-04-19CA1010017_035_035-202104191045ND
2021-05-05CA1010017_070_070-202105051115ND
2021-05-05CA1010017_071_071-202105050945ND
2021-06-01CA1010017_070_070-202106011140ND
2021-06-01CA1010017_071_071-202106011030ND
2021-07-06CA1010017_071_071-202107061030ND
2021-07-06CA1010017_070_070-202107060920ND
2021-09-14CA1010017_070_070-202109141000ND
2021-09-14CA1010017_071_071-202109141130ND
2021-10-07CA1010017_071_071-202110071025ND
2021-10-07CA1010017_070_070-202110071100ND
2021-11-09CA1010017_071_071-202111091130ND
2021-11-09CA1010017_070_070-202111091045ND
2021-12-01CA1010017_070_070-202112011000ND
2021-12-01CA1010017_071_071-202112011040ND
2022-01-10CA1010017_071_071-202201101015ND
2022-01-10CA1010017_070_070-202201100900ND
2022-02-07CA1010017_071_071-202202071015ND
2022-02-07CA1010017_070_070-202202071230ND
2022-02-11CA1010017_041_041-202202111400ND
2022-02-11CA1010017_066_066-202202111100ND
2022-03-02CA1010017_059_059-202203021255ND
2022-03-02CA1010017_065_065-202203021240ND
2022-03-08CA1010017_070_070-202203081000ND
2022-03-08CA1010017_071_071-202203081145ND
2022-04-04CA1010017_071_071-202204041315ND
2022-04-04CA1010017_070_070-202204041100ND
2022-04-06CA1010017_037_037-202204061135ND
2022-04-06CA1010017_040_040-202204061105ND
2022-04-06CA1010017_043_043-202204061045ND
2022-04-06CA1010017_044_044-2022040610302.70 ppb
2022-04-12CA1010017_057_057-202204121325ND
2022-04-12CA1010017_056_056-202204121305ND
2022-04-12CA1010017_058_058-202204121345ND
2022-04-19CA1010017_038_038-202204191030ND
2022-04-19CA1010017_046_046-202204191300ND
2022-05-03CA1010017_070_070-202205031015ND
2022-05-03CA1010017_071_071-202205030840ND
2022-06-07CA1010017_070_070-202206071000ND
2022-06-07CA1010017_071_071-202206071130ND
2022-07-06CA1010017_071_071-202207061030ND
2022-07-06CA1010017_070_070-202207060930ND
2022-08-08CA1010017_070_070-202208081345ND
2022-08-08CA1010017_071_071-202208081310ND
2022-09-06CA1010017_070_070-202209061200ND
2022-09-06CA1010017_071_071-202209060820ND
2022-11-01CA1010017_070_070-202211011000ND
2022-11-01CA1010017_071_071-202211011045ND
2023-01-03CA1010017_070_070-202301031305ND
2023-01-03CA1010017_071_071-202301031220ND
2023-02-13CA1010017_070_070-202302130850ND
2023-02-13CA1010017_071_071-202302130945ND
2023-03-23CA1010017_071_071-202303231130ND
2023-03-23CA1010017_070_070-202303231245ND
2023-04-12CA1010017_070_070-202304121045ND
2023-04-12CA1010017_071_071-202304121230ND
2023-04-18CA1010017_070_070-202304181340ND
2023-04-18CA1010017_071_071-202304181320ND
2023-04-24CA1010017_002_002-202304241100ND
2023-04-24CA1010017_049_049-202304241210ND
2023-04-24CA1010017_047_047-202304241125ND
2023-04-24CA1010017_048_048-202304241140ND
2023-05-01CA1010017_070_070-202305011210ND
2023-05-01CA1010017_071_071-202305010920ND
2023-06-01CA1010017_070_070-202306011030ND
2023-06-01CA1010017_071_071-202306011215ND
2023-07-11CA1010017_070_070-202307111130ND
2023-07-11CA1010017_071_071-202307111050ND
2023-08-01CA1010017_070_070-202308011330ND
2023-08-01CA1010017_071_071-202308011235ND
2023-09-08CA1010017_071_071-202309080950ND
2023-09-08CA1010017_070_070-202309080915ND
2023-10-04CA1010017_070_070-202310040930ND
2023-10-04CA1010017_071_071-202310041030ND