Know Your Environment. Protect Your Health.

Arsenic

Cazadero Water Company Inc.

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND40ND
2020ND20ND
2021ND30ND
2022ND40ND
2023ND40ND

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
2019-03-22CA4900508_011_011-201903221030ND
2019-03-22CA4900508_001_001-201903221150ND
2019-03-22CA4900508_005_005-201903221010ND
2019-03-22CA4900508_006_006-201903221050ND
2020-12-17CA4900508_001_001-202012171230ND
2020-12-21CA4900508_011_011-202012210725ND
2021-04-01CA4900508_001_001-202104010917ND
2021-04-01CA4900508_006_006-202104010933ND
2021-06-08CA4900508_005_005-202106080926ND
2022-03-14CA4900508_011_011-202203141039ND
2022-03-14CA4900508_001_001-202203141146ND
2022-11-03CA4900508_006_006-202211031102ND
2022-11-03CA4900508_005_005-202211031155ND
2023-03-06CA4900508_011_011-202303060912ND
2023-03-06CA4900508_001_001-202303060812ND
2023-12-11CA4900508_006_006-202312111315ND
2023-12-11CA4900508_005_005-202312111300ND