Rural Home CompassWisconsin record lookup
How to find a Wisconsin well construction report
Start with the Wisconsin DNR well-record search. A Wisconsin Unique Well Number makes the search faster; the Groundwater Retrieval Network serves a different job by showing available groundwater sample history.
Choose the right record
Which Wisconsin system should you use?
These names describe different parts of the record trail. They are not three interchangeable searches.
Well Construction Report search
Find the construction record—also called a well log or well record—for depth, casing, construction method, geology, initial water level, and initial yield.
- Use it when
- You need to identify how the well was built or locate its construction report.
Official sourceLook up groundwater and well data
Wisconsin Unique Well Number
Use the WUWN to connect an individual well with its construction and available sampling records. It is an identifier, not a water-quality result.
- Use it when
- A WUWN appears on a well label, an older report, or another property record.
Official sourceAssigning and Verifying Wisconsin Unique Well Numbers
Groundwater Retrieval Network
GRN includes a public well-inventory search and available sample history. Some well details may link to a WCR, but this does not guarantee a construction report for every private well or make GRN equivalent to the main WCR search.
- Use it when
- Try the inventory if the main application is inaccessible or a record does not match. Search using WUWN or available location fields, such as county, municipality, or well address.
Official sourceGroundwater Retrieval Network
Well Filling & Sealing reports ↗ document filling and sealing (well abandonment), rather than original construction. A WCR is historical construction evidence; GRN holds well inventory and available sample history. None of these records certifies current water safety.
Official record systemsLook up groundwater and well dataGroundwater Retrieval Network
Step by step
A practical lookup path
- 01
Use the WUWN first when you have it.
Enter the Wisconsin Unique Well Number in the top search box. DNR has assigned WUWNs to private wells since January 1, 1988, and older wells can receive one when they are inventoried.
Official guidanceLook up groundwater and well dataAssigning and Verifying Wisconsin Unique Well Numbers
- 02
Choose the search path by construction era.
For a well built in 1988 or later, DNR recommends county plus part of the street name, or the owner name at the time of construction. For a pre-1988 well, search only by township, range, and section; address, owner, and year fields are often blank.
Official guidanceLook up groundwater and well data
- 03
Open the actual report, not just the result row.
Older results can require opening each “Image file” PDF. Compare the report’s location, owner-at-construction, completion date, and construction details with the property rather than accepting the first nearby match.
Official guidanceLook up groundwater and well data
- 04
Check GRN separately for available sample history.
GRN can report well inventory and sample-result history by location or WUWN. Some results represent untreated water and some represent water after treatment, so the record context matters.
Official guidanceGroundwater Retrieval Network
RHC lookup note: The construction-era instructions above describe DNR’s well-record search guidance, not a walkthrough of the newer map. Use the fields available in the application you open; GRN inventory and map controls may differ.
No match
If the well record is missing
If an application errors or you cannot match a report
RHC lookup planning: Return to the DNR well-record instructions, or try the public GRN well inventory. A failed search does not establish that a report is absent or that all DNR systems are unavailable.
DNR directs record questions and technical difficulties to DNRWELLREPORT@wisconsin.gov. If the record or report remains missing, contact DNR for help; the backup search does not guarantee recovery.
Official contact and inventory guidanceLook up groundwater and well dataGroundwater Retrieval Network
Lookup entry links and DNR contact checked ; other source-review dates remain listed below.
The well may be too new for the public record.
A well construction report must be submitted after construction, but DNR says a well drilled within the last two months may not yet appear in the data system.
Official guidanceLook up groundwater and well dataWisconsin water well driller license exam study guide
An older report may never have been submitted.
DNR explicitly notes that some older wells have no submitted report. That missing document does not, by itself, prove that the property has no well or that the well is illegal.
Official guidanceLook up groundwater and well data
The search fields may not match today’s property details.
The owner field reflects the owner when the well was constructed, and the WCR system does not search by tax parcel number. Try a partial street name, township-range-section, and the map instead.
Official guidanceLook up groundwater and well data
Ask for a measured inventory when the report is truly missing.
DNR says a licensed well professional can measure the well depth, casing, water level, coordinates, and address. DNR can then create a well inventory report and assign a WUWN. A delegated county may also hold permit or inspection material for the functions it administers, but county coverage is not uniform statewide.
Official guidanceLook up groundwater and well dataInformation for delegated countiesInformation for private well owners
Report decoder
What matters on a well construction report
Completion date and constructor
Helps distinguish the correct well and identify who documented the original work.
The owner and address reflect the record at construction, not necessarily the current deed or mailing address.
Official record guidanceLook up groundwater and well dataWisconsin water well driller license exam study guide
Drillhole and casing depth
Shows the recorded physical depths and is useful when planning inspection, pump work, or sealing.
Depth alone does not predict whether today’s water is safe.
Official record guidanceLook up groundwater and well data
Geology or formation
Describes materials encountered during drilling and helps a professional interpret the construction approach.
A formation name is not a current contaminant result.
Official record guidanceLook up groundwater and well dataWisconsin water well driller license exam study guide
Static water level
Records the water level observed at construction and provides historical context for a professional.
It is not a live measurement of today’s level or available household supply.
Official record guidanceLook up groundwater and well dataWisconsin water well driller license exam study guide
Initial yield or pump test
Shows the gallons-per-minute result recorded when the well was drilled.
DNR says this is the initial test only; it does not establish current yield.
Official record guidanceLook up groundwater and well data
Casing and sealing or grouting details
Helps a licensed professional review how the well was protected during construction.
A report entry is not a substitute for an on-site condition or compliance inspection.
Official record guidanceWisconsin water well driller license exam study guide
What the record cannot prove
Keep construction history separate from current conditions.
A well record is not a current water test.
Construction details and historic samples cannot certify the water you drink today. Use current Wisconsin testing guidance for the actual household decision.
Evidence boundaryLook up groundwater and well dataGroundwater Retrieval Network
A blank map is not proof that no well exists.
Search limitations, old ownership fields, delayed entry, and missing historic reports can all produce no match.
Evidence boundaryLook up groundwater and well data
A map point is a search aid, not field verification.
Use the mapped result to narrow candidates, then compare the report and property and have a professional locate the well when the physical location matters.
Evidence boundaryLook up groundwater and well dataInformation for private well owners
Depth and geology do not prove water safety.
They describe construction context. Only appropriate sampling and laboratory analysis answer a current water-quality question.
Evidence boundaryLook up groundwater and well dataGroundwater Retrieval Network
Your next water decision
A construction report cannot replace a current test.
Use the Wisconsin testing guide to choose the routine, event-triggered, purchase, or regulated-work path that fits the property.
Open Wisconsin private-well testing →Official sources
These sources were checked on 2026-09-22. Live search tools, county roles, and contact paths are rechecked every 90 days where marked.
- Wisconsin Department of Natural Resources: Look up groundwater and well dataReviewed 2026-09-22 · Recheck every 90 days
- Wisconsin Department of Natural Resources: Groundwater Retrieval NetworkReviewed 2026-09-22 · Recheck every 90 days
- Wisconsin Department of Natural Resources: Assigning and Verifying Wisconsin Unique Well NumbersReviewed 2026-09-22
- Wisconsin Department of Natural Resources: Information for delegated countiesReviewed 2026-09-22 · Recheck every 90 days
- Wisconsin Department of Natural Resources: Information for private well ownersReviewed 2026-09-22 · Recheck every 90 days
- Wisconsin Department of Natural Resources: Wisconsin water well driller license exam study guideReviewed 2026-09-22