Carbon capture and storage as a public health issue  

article  Excerpt:  Contamination of Water Supplies

Injecting carbon dioxide into or near underground aquifers leads to
the formation of carbonic acid. Such acidification can dramatically
alter water quality by increasing the leaching of contaminants such as
arsenic, lead, mercury, and organic compounds. In addition, the
injected carbon dioxide may be contaminated with other pollutants from
the coal plant emissions. Injection of carbon dioxide directly into
oceans in large amounts also would make current problems of ocean
acidification worse.[1]

The widespread use of geologic formations as storage for carbon
dioxide could compromise not-currently-used aquifers on which future
generations may depend for drinking water. Communities across the
United States and world--wide are increasingly dependent on aquifers
for drinking water as surface water resources are depleted.