Know Your Environment. Protect Your Health.

Arsenic

Desoto PWS

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.255 ppb41ND - 1.02 ppb
20190.310 ppb41ND - 1.24 ppb
20200.344 ppb51ND - 1.72 ppb
20210.283 ppb41ND - 1.13 ppb
20220.708 ppb42ND - 1.80 ppb
20230.496 ppb52ND - 1.42 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
2018-01-29AD11506ND
2018-04-24AD18230ND
2018-07-18AD29472ND
2018-10-17AD346211.02 ppb
2019-01-08AD37930ND
2019-04-17AD46361ND
2019-07-24AD521381.24 ppb
2019-10-22AD56916ND
2020-01-29AD60675ND
2020-04-162004612ND
2020-07-2720122281.72 ppb
2020-10-262013354ND
2020-10-262017107ND
2021-01-252020535ND
2021-04-1921041931.13 ppb
2021-07-192114286ND
2021-10-262118718ND
2022-01-242122232ND
2022-04-1322048461.80 ppb
2022-07-1122154501.03 ppb
2022-10-162220249ND
2023-01-232223701ND
2023-04-242303893ND
2023-07-172312294ND
2023-08-1423138031.42 ppb
2023-10-2323173381.06 ppb