Dam Safety Engineering Maps

• Probable Maximum Precipitation

Floodplain Management Maps

• Flood Insurance Rate Maps
• Map Modernization (of FIRMs)

Ground Water Mapping

• Ground Water Resources Maps
• Ground Water Pollution Potential Maps
• State Bedrock and Glacial Aquifer Mapping (SAMP)
• Ground Water Potentiometric Surface Maps 
• Generalized State Ground Water Map of Well Yields

Location of the Division of Soil and Water Resources Map

Soils Mapping

• ERIN Interactive Mapping Tool
• Soil Regions Map
• County Soil Surveys as PDFs
• Soils GIS Coverages and Data

Watershed and Basin Divide Maps

• Watershed Coordinators Grant and Plan Status Maps
• Principal Streams and their Drainage Areas 1999
• Lake Erie - Ohio River Divide in Ohio 2004

Water Inventory, Water Cycle and Precipitation Maps

• Ground Water Level Observation Wells Location and ID Numbers
• Precipitation in Ohio 50 yr average
• Probable Maximum Precipitation
• Hydrologic Atlas containing:
  • 50 yr average maps of precip,
  • stream flow
  • temp
  • water loss
  • snow fall and evaporation.

Water Withdrawal Facilities Maps

• Water Withdrawal 2006   NEW 7/25/2008
• Water Withdrawals by Basin and County

Water Planning Maps

• Community Water Supply Planning Studies