- Corrosive groundwater, if untreated, can dissolve lead and other metals from pipes.
- National maps have been prepared to identify the occurrence of potentially corrosive groundwater in the U.S.
- These findings have the greatest implication for the 44 million people dependent on domestic wells for drinking water.
Why is our porcelain sink stained brown?
The brown stain is from a large amount of iron in your water. It is closely related to simple rust that you see on metal, which is iron oxide. Your water probably comes from groundwater that filtered through rocks containing iron-rich minerals on its way to the well.
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Related
What can be causing our drinking water to have a reddish color?
Why does my drinking water look cloudy sometimes?
Why does it take so long to rinse the soap off my hands? What are hard water and soft water?
Where can I find information about my local drinking water supply?
What can cause our water to have an earthy odor or to smell like rotten eggs?
Where can I find information about bottled water?

- Corrosive groundwater, if untreated, can dissolve lead and other metals from pipes.
- National maps have been prepared to identify the occurrence of potentially corrosive groundwater in the U.S.
- These findings have the greatest implication for the 44 million people dependent on domestic wells for drinking water.
This short video is one of a series of four total shorts highlighting USGS water science in California's Delta region. The Sacramento-San Joaquin Delta is the hub of the state's water system. Water quality touches on all aspects of life. Teams of U.S.
This short video is one of a series of four total shorts highlighting USGS water science in California's Delta region. The Sacramento-San Joaquin Delta is the hub of the state's water system. Water quality touches on all aspects of life. Teams of U.S.
Naturally occuring bog-iron area near Rochford, SD, in the Black Hills of western South Dakota.
Naturally occuring bog-iron area near Rochford, SD, in the Black Hills of western South Dakota.

Photograph showing natural iron-rich acidic spring flowing into Cement Creek near Silverton, Colorado. Similar natural springs contribute water to Cement Creek and other tributaries of the upper Animas River.
Photograph showing natural iron-rich acidic spring flowing into Cement Creek near Silverton, Colorado. Similar natural springs contribute water to Cement Creek and other tributaries of the upper Animas River.
The quality of our Nation's waters: Water quality in principal aquifers of the United States, 1991-2010
Relation of arsenic, iron, and manganese in ground water to aquifer type, bedrock lithogeochemistry, and land use in the New England coastal basins
Related
What can be causing our drinking water to have a reddish color?
Why does my drinking water look cloudy sometimes?
Why does it take so long to rinse the soap off my hands? What are hard water and soft water?
Where can I find information about my local drinking water supply?
What can cause our water to have an earthy odor or to smell like rotten eggs?
Where can I find information about bottled water?

- Corrosive groundwater, if untreated, can dissolve lead and other metals from pipes.
- National maps have been prepared to identify the occurrence of potentially corrosive groundwater in the U.S.
- These findings have the greatest implication for the 44 million people dependent on domestic wells for drinking water.
- Corrosive groundwater, if untreated, can dissolve lead and other metals from pipes.
- National maps have been prepared to identify the occurrence of potentially corrosive groundwater in the U.S.
- These findings have the greatest implication for the 44 million people dependent on domestic wells for drinking water.
This short video is one of a series of four total shorts highlighting USGS water science in California's Delta region. The Sacramento-San Joaquin Delta is the hub of the state's water system. Water quality touches on all aspects of life. Teams of U.S.
This short video is one of a series of four total shorts highlighting USGS water science in California's Delta region. The Sacramento-San Joaquin Delta is the hub of the state's water system. Water quality touches on all aspects of life. Teams of U.S.
Naturally occuring bog-iron area near Rochford, SD, in the Black Hills of western South Dakota.
Naturally occuring bog-iron area near Rochford, SD, in the Black Hills of western South Dakota.

Photograph showing natural iron-rich acidic spring flowing into Cement Creek near Silverton, Colorado. Similar natural springs contribute water to Cement Creek and other tributaries of the upper Animas River.
Photograph showing natural iron-rich acidic spring flowing into Cement Creek near Silverton, Colorado. Similar natural springs contribute water to Cement Creek and other tributaries of the upper Animas River.