Know Your Environment. Protect Your Health.

Arsenic

Western Cass Water Supply Corporation

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND30ND
2020ND10ND
2021ND20ND
2022ND30ND
2023ND10ND

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
2018-03-08Q1809687016ND
2018-03-08Q1809687017ND
2019-05-02Q1918236012ND
2019-05-02Q1918236013ND
2019-05-02Q1918236014ND
2020-03-19Q2011997016ND
2021-10-25Q2129911020ND
2021-10-25Q2129911027ND
2022-04-14Q2211593001ND
2022-04-14Q2211593002ND
2022-11-16Q2234548004ND
2023-08-01Q2331111011ND