Learn about the DNR's COVID-19 response and how the current health emergency is impacting DNR facilities, services and events.

Screen image and link for IGS/IIHR Well Log Form

Well Logs and Well Reporting

A well log is a crucial source of information that documents the construction of a water supply well. Having a written record detailing the well's construction is more accurate than trying to remember the information when needed. Detailed well logs contain information like the types and thickness of each geological sequence encountered, the types of materials used in the well's construction, the construction techniques used as the well was installed, the water levels of the aquifer(s) while at rest and when pumping, how much water the well will provide and then name and contact information of the certified well contractor(s) who provided oversight during well construction. The well log not only provides the well owner with an important tool that can help troubleshoot the well if problems develop, it is a requirement in Iowa for all new well construction.


Screen image and link for IGS/IIHR GeoSam database

You may also be interested in the GeoSam Database maintained by The Iowa Geological Survey, part of The University of Iowa IIHR—Hydroscience & Engineering

The information available in GeoSam can be used by drillers, consultants, engineers, property owners, and the general public to aid in estimating the depth to major geologic features, well depth and construction concepts, water yield of specific aquifers and other site specific information needs. Additional information regarding the GeoSam database can be obtained by contacting The University of Iowa IIHR—Hydroscience & Engineering.

Private Well Tracking System screen image and link

The DNR has an online database that contains information for some of the wells installed in Iowa. The private water supply well records that are available as public records can be found in the Iowa DNR Private Well Tracking System (PWTS) database. This data source may contain information regarding wells in your area of interest.

One common question that we routinely answer relates to the availability of well logs for all water wells found within our state. Unfortunately, the state does not maintain a single data source that provides well information for every well that has been installed throughout history - This type of information does not exist.

IIHR-IGS Well Record Form 542-8170