Know Your Environment. Protect Your Health.

Arsenic

City of Auburn

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.450 ppb62ND - 1.60 ppb
2019N/A00N/A
2020N/A00N/A
20210.671 ppb73ND - 2.40 ppb
20220.257 ppb71ND - 1.80 ppb
20230.257 ppb71ND - 1.80 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
2018-08-15ND
2018-08-15ND
2018-08-151.10 ppb
2018-08-151.60 ppb
2018-08-15ND
2018-08-15ND
2021-08-0441730362.40 ppb
2021-08-044159330ND
2021-08-044159328ND
2021-08-0441730391.20 ppb
2021-08-0441730371.10 ppb
2021-08-044216833ND
2021-08-044216833ND
2022-08-044364198ND
2022-08-044364193ND
2022-08-044364200ND
2022-08-044364200ND
2022-08-044364199ND
2022-08-0443661741.80 ppb
2022-08-044366173ND
2023-08-034511136ND
2023-08-034511142ND
2023-08-034511142ND
2023-08-034511146ND
2023-08-034511128ND
2023-08-0945110641.80 ppb
2023-08-094511063ND