Illustration of a deep <a href="https://en.wikipedia.org/wiki/injection_well" class="extiw" title="w:injection well">injection well</a> for disposal of hazardous, industrial and municipal wastewater. Categorized as a "Class I Well" under the U.S. <a href="https://en.wikipedia.org/wiki/Safe_Drinking_Water_Act" class="extiw" title="w:Safe Drinking Water Act">Safe Drinking Water Act</a>.
<a href="https://en.wikipedia.org/wiki/United_States_Environmental_Protection_Agency" class="extiw" title="w:United States Environmental Protection Agency">US Environmental Protection Agency</a>, Washington, DC
2010-01-22
<a rel="nofollow" class="external text" href="http://www.epa.gov/safewater/uic/wells_drawings.html">"Underground Injection Control Program: Typical Injection Wells"</a>.