Critical habitat is now part of every Groundcheck property screen. The report checks the saved parcel against the U.S. Fish and Wildlife Service's separate final and proposed critical-habitat polygon layers and identifies the associated species and mapped units.
This matters early because a project involving a federal permit, license, authorization, or funding source can require Endangered Species Act consultation. An intersection does not automatically stop private development, but it can change permitting questions, project layout, schedule, and the agencies that should be involved.
What the USFWS source provides
The USFWS Environmental Conservation Online System publishes a national ArcGIS feature service with separate polygon layers for final and proposed critical habitat. Available records can include common and scientific names, species and entity identifiers, habitat units and subunits, listing status, Federal Register references, publication and effective dates, vacate dates, and mapping accuracy.
The live polygon service reported an August 5, 2026 data edit when this Groundcheck layer was added. Groundcheck queries the live service when a report runs and saves the query time with the result rather than presenting the data as permanently current.
How Groundcheck uses the layer
Groundcheck checks the parcel polygon against final and proposed habitat separately. If no parcel boundary is available, it uses a clearly labeled approximate 30 meter search around the saved property point. Returned polygons are included in the report's expandable map so you can see the mapped evidence.
Final and proposed records remain separate in the report, and vacated records are retained as historical context rather than treated as active designations. Repeated service features are collapsed without merging genuinely different units or subunits.
How to interpret an intersection
Groundcheck uses moderate concern for a current final or proposed intersection. It does not automatically call the property high risk because the effect depends on the project and whether there is a federal nexus. A proposed designation is also labeled as pending rather than effective.
If the layer intersects, confirm the current designation and Federal Register materials with USFWS and the agencies responsible for the project's permits or funding. The map is an early screening signal, not a legal boundary determination or an official species list.
- Identify any federal permits, authorizations, licenses, or funding tied to the project.
- Review which species, units, and rule dates appear in the finding.
- Compare the mapped habitat with the likely area of disturbance and access routes.
- Ask the responsible agency whether consultation or a more complete species review is needed.
What a clear result cannot prove
The ECOS portal warns that not all USFWS-designated critical habitat is available through the portal. Groundcheck's first version checks polygon layers only, while some habitat is represented as lines. Species under the sole jurisdiction of NOAA Fisheries also require a separate source.
No mapped intersection does not prove that listed species, important habitat, or Endangered Species Act obligations are absent. The Federal Register rule and official maps control when they differ from the screening service, and project-specific review still belongs with the agencies and qualified environmental professionals.
Use the new layer
Check the property you are considering
Groundcheck combines this source with parcel details and other available national, state, and local layers.
Start a property check See every Groundcheck data layerGroundcheck provides early public data screening, not a legal, engineering, surveying, environmental, planning, permitting, or buildability determination. Verify important findings with the responsible agencies and qualified professionals.