Know Your Environment. Protect Your Health.

Arsenic

Staffordshire Country Estates

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.

 

65

Samples

10

Samples exceeding legal limit (MCL)

41

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20186.63 ppb882.00 ppb - 18.0 ppb
20198.71 ppb771.000 ppb - 18.0 ppb
20202.22 ppb97ND - 11.0 ppb
20218.78 ppb992.00 ppb - 15.0 ppb
20220.333 ppb93ND - 1.000 ppb
20231.04 ppb237ND - 18.0 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 Result
2018-02-122.00 ppb
2018-05-226.00 ppb
2018-05-222.00 ppb
2018-05-2218.0 ppb
2018-05-225.00 ppb
2018-08-276.00 ppb
2018-12-187.00 ppb
2018-12-187.00 ppb
2019-03-047.00 ppb
2019-04-1612.0 ppb
2019-04-1618.0 ppb
2019-04-1616.0 ppb
2019-09-102.00 ppb
2019-11-251.000 ppb
2019-11-255.00 ppb
2020-03-02ND
2020-03-02ND
2020-05-041.000 ppb
2020-05-0411.0 ppb
2020-05-041.000 ppb
2020-08-242.00 ppb
2020-08-241.000 ppb
2020-10-122.00 ppb
2020-10-122.00 ppb
2021-01-0614.0 ppb
2021-01-063.00 ppb
2021-04-192.00 ppb
2021-04-1913.0 ppb
2021-04-193.00 ppb
2021-08-177.00 ppb
2021-08-1714.0 ppb
2021-10-128.00 ppb
2021-10-1215.0 ppb
2022-02-22ND
2022-02-221.000 ppb
2022-05-171.000 ppb
2022-05-17ND
2022-05-17ND
2022-08-011.000 ppb
2022-08-01ND
2022-12-12ND
2022-12-12ND
2023-02-061.000 ppb
2023-02-06ND
2023-03-13ND
2023-03-131.000 ppb
2023-04-101.000 ppb
2023-04-10ND
2023-04-1018.0 ppb
2023-05-17ND
2023-05-17ND
2023-06-051.000 ppb
2023-06-05ND
2023-07-13ND
2023-07-13ND
2023-08-14ND
2023-08-14ND
2023-09-11ND
2023-09-11ND
2023-10-09ND
2023-10-091.000 ppb
2023-11-131.000 ppb
2023-11-13ND
2023-12-19ND
2023-12-19ND