Catalog - Data.gov

An official website of the United States government

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.

This site is currently in beta, and your feedback is helping shape its ongoing development.

Data
Metrics
Organizations
User Guide
Contact

Search datasets

Found 1 dataset matching "University of Wisconsin Arboretum National Historic Landmark".

Draw a geographic box

Draw and drag to set the area, then Apply . Use Within/Intersect to match datasets to the box. The map displays top 20 Within results.

Within

Intersect

#1 Federal
Total Mercury Concentrations in Dragonfly Larvae from U.S. National Parks (ver. 11.0, January 2026)
- Organization: Department of the Interior
- Updated: 2026-01-05T00:00:00Z
Comma-separated values (.csv) file containing data related to mercury concentrations in dragonfly samples from U.S. National Parks, Protected Places, and other federal lands collected as part of...
- xml
- xml
Search relevance: 32.83 | Views last month: 0

Filter selections are applied on each click

Sort by

Filter by Geography
Start typing to see suggestions or use the pencil button to open a larger map

Filter by keyword
Start typing to see suggestions

Popular keywords:

Filter by organization
Start typing to select an organization

Popular organizations:

Organization types

Federal Government

City Government

State Government

County Government

University

Tribal

Non-Profit

Spatial data options

All datasets

Geospatial only

Non-geospatial only

About
Open Government
Website Policies
PERFORMANCE.GOV
Data.gov on Github

Follow @GSA

data.gov

An official website of the GSA's Technology Transformation Services

About GSA
Accessibility statement
FOIA requests
No FEAR Act data
Office of the Inspector General
Performance reports
Privacy policy

Looking for U.S. government information and services?

Visit USA.gov

Draw a geographic box

Total Mercury Concentrations in Dragonfly Larvae from U.S. National Parks (ver. 11.0, January 2026)