Know Your Environment. Protect Your Health.

Arsenic

CTWC - Naugatuck Region-Central System

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
2018ND30ND
2019ND20ND
2020ND20ND
2021ND20ND
2022ND20ND
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
2018-04-10CA17352IOC1ND
2018-06-11CA67844IOC1ND
2018-11-14IOCR 200512736ND
2019-01-16IOC1 200518936ND
2019-01-18IOCR 200519147ND
2020-01-13IOC1 200562694ND
2020-01-13IOCR 200562691ND
2021-04-06IOC1 200611960ND
2021-04-06IOCR 200611959ND
2022-02-14CK66672ND
2022-02-14CK66670ND
2023-01-16CN24828ND
2023-01-16CN24826ND