Know Your Environment. Protect Your Health.

Arsenic

Groton Utilities

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2018-11-2928467IOCRND
2018-11-2928430IOC1ND
2019-11-2030564IOCRND
2019-11-2030566IOC1ND
2020-12-0132781IOCRND
2020-12-0132783IOC1ND
2021-10-2734806IOCRND
2021-10-2734812IOC1ND
2022-09-1536588IOCRND
2022-09-1536587IOCRND
2022-09-1537093IOC1ND
2023-09-1438748IOCRND
2023-09-1438742IOC1ND