Arsenic Testing Results in Public Water

Arsenic is a toxic chemical element that is found naturally in the Earth's crust in soil, rocks, and minerals. The levels of arsenic found in drinking water systems and private water supplies across the United States vary widely. The maximum contaminant level (MCL) for Arsenic is 10 mcg/L.

Read more about Arsenic in Public Water and Health

Measure Description:

• Public Water Systems - Avg is the number of community water systems that have an annual average concentration of a contaminant in the listed concentration range.
• Population Served - Avg is the population served by community water systems that have an annual average concentration of a contaminant in the listed concentration range.
• Public Water Systems - Max is the number of community water systems that have an annual maximum concentration of a contaminant in the listed concentration range.
• Population Served - Max is the population served by community water systems that have an annual maximum concentration of a contaminant in the listed concentration range.
• Average Concentration by Public Water System is the average concentration of a contaminant.

Use the tabs to see the different data visualizations.

Measures are defined above the visualization. Additional help can be found in the Help Section.

To download a data table click on the Title Text of the data table, click "Download" on the right below the data visualization, click "Crosstab" from the listed file formats, and click "Download". A '.csv' file will then download and can be opened in a text or spreadsheet application.