Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2018 Jun 27;126(6):067008. doi: 10.1289/EHP2663

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

EHP is an open-access journal published with support from the National Institute of Environmental Health Sciences, National Institutes of Health. All content is public domain unless otherwise noted.

PMC Copyright notice

Map of Ohio marking locations of Class 2 injection wells. — Locations of Class II injection wells in Ohio (2010–2016), delineated by census block group. Data obtained from the U.S. Census Bureau (2016b) and FracTracker Alliance (2016).