Know Your Environment. Protect Your Health.

Arsenic

Harris County Fresh Water Supply District 1a

NOTE: Harris County Fresh Water Supply District 1a purchases water from Baytown Area Water Authority which is required to test for arsenic. Sample information shown below was taken by Baytown Area Water Authority.

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
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

NOTE: Harris County Fresh Water Supply District 1a purchases water from Baytown Area Water Authority which is required to test for arsenic. Sample information shown below was taken by Baytown Area Water Authority.

Date Lab ID Result
2018-02-12AE13215ND
2019-01-14AE49494ND
2020-03-16AF02872ND
2021-01-12AF38753ND
2021-09-27AF71186ND
2022-01-12AF79873ND
2022-01-12AF79874ND
2023-01-12AG24316ND
2023-01-12AG24317ND