Know Your Environment. Protect Your Health.

Arsenic

West Jefferson Waterworks District 2

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)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.700 ppb310.600 ppb - 1.81 ppb
20191.10 ppb310.400 ppb - 1.70 ppb
2020ND10ND
20210.333 ppb31ND - 1.000 ppb
2022ND10ND
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
2018-01-3035371297004ND
2018-01-3035371297004ND
2018-06-010.700 ppb*
2019-02-0535446731001ND
2019-02-0535446731001ND
2019-06-011.10 ppb*
2020-03-18B2001335-001ND
2021-01-28B2100438-001ND
2021-12-09B2106585-001ND
2021-12-09B2106585-0021.000 ppb
2022-01-13B2200185-001ND
2023-02-01B2300471-001ND

* Sample result is taken from the system's CCR report.