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

Ash Meadow National Wildlife Refuge Assateague Island National Seashore Banks Lake National Wildlife Refuge Battle Creek Cypress Swamp National Natural Landmark Bear Creek Lake Park Bear Meadows Natural Area National Natural Landmark Big Bend National Park Big Cypress National Preserve Big Thicket National Preserve Bill Williams River National Wildlife Refuge Biscayne National Park Bitter Lake National Wildlife Refuge Black Rock Forest Bluestone National Scenic River Bosque del Apache National Wildlife Refuge Buffalo National River Cape Cod National Seashore Cape Romain National Wildlife Refuge Capitol Reef National Park Carl Sandburg Home National Historic Site Carlsbad Caverns National Park Central California Ukiah Channel Islands National Park Chattahoochee River National Recreation Area Chickasaw National Recreation Area Chugach National Forest City of Rocks National Reserve Clarks River National Wildlife Refuge Colorado National Monument Congaree National Park Crater Lake National Park Craters of the Moon National Monument and Preserve Crescent Lake National Wildlife Refuge Cumberland Island National Seashore Cuyahoga Valley National Park Death Valley National Park Deer Flat National Wildlife Refuge Delaware Water Gap National Recreation Area Denali National Park and Preserve Desert National Wildlife Refuge Devils Tower National Monument Dinosaur National Monument East Inlet Natural Area National Natural Landmark Edwin B. Forsythe National Wildlife Refuge Effigy Mounds National Monument Ell Pond Preserve National Natural Landmark Everglades National Park Fish Springs National Wildlife Refuge Flint Hills National Wildlife Refuge Fort Larned National Historic Site Fort Worth Nature Center and Refuge National Natural Landmark Gates of the Arctic National Park and Preserve Gateway National Recreation Area Gauley River National Recreation Area Glacier Bay National Park and Preserve Glacier National Park Glen Canyon National Recreation Area Golden Gate National Recreation Area Grand Canyon National Park Grand Canyon-Parashant National Monument Grand Portage National Monument Grand Teton National Park Great Basin National Park Great Sand Dunes National Park and Preserve Great Smoky Mountains National Park Gulf Islands National Seashore Hagerman Fossil Beds National Monument Harris Neck National Wildlife Refuge Havasu National Wildlife Refuge Hawaii Volcanoes National Park Herbert Hoover National Historic Site Homestead National Historical Park Hopewell Culture National Historical Park Horseshoe Bend National Military Park Hot Springs National Park Houlton Band of the Maliseet Indians Ice Age National Scenic Trail Imperial National Wildlife Refuge Indiana Dunes National Park Isle Royale National Park Jean Lafitte National Historical Park and Preserve John Day Fossil Beds National Monument Joshua Tree National Park Kanuti National Wildlife Refuge Katahdin Woods and Waters National Monument Katmai National Park and Preserve Kenai Fjords National Park Kenilworth Park and Aquatic Gardens Klondike Gold Rush National Historical Park Knife River Indian Villages National Historic Site Laguna Cartagena National Wildlife Refuge Lake Clark National Park and Preserve Lake Roosevelt National Recreation Area Lassen Volcanic National Park Lewis and Clark National Historical Park Lilley Cornett Woods National Natural Landmark Lostwood National Wildlife Refuge Lowell National Historical Park Lower Suwannee National Wildlife Refuge Mammoth Cave National Park Marsh-Billings-Rockefeller National Historical Park Mattamuskeet National Wildlife Refuge Maurice National Wild and Scenic River Medicine Lake National Wildlife Refuge Mingo National Wildlife Refuge Minute Man National Historical Park Mississippi National River and Recreation Area Monocacy National Battlefield Monte Vista National Wildlife Refuge Montezuma Castle National Monument Moosehorn National Wildlife Refuge Morristown National Historical Park Mount Rainier National Park Muscatatuck National Wildlife Refuge Nashua, Squannacook, and Nissitissit Wild and Scenic Rivers Natchez Trace Parkway and National Scenic Trail National Elk Refuge New River Gorge National Park and Preserve Niobrara National Scenic River North Cascades National Park Northwest Oregon Cascades Northwest Oregon Marys Peak Northwest Oregon Siuslaw Ocmulgee Mounds National Historical Park Ohio River Islands National Wildlife Refuge Okefenokee National Wildlife Refuge Olympic National Park Oregon Caves National Monument and Preserve Ouray National Wildlife Refuge Ozark National Scenic Riverways Padre Island National Seashore Pahranagat National Wildlife Refuge Pennsylvania Allegheny River Penobscot Nation Trust Lands Petersburg National Battlefield Pictured Rocks National Lakeshore Pinnacles National Park Pipestone National Monument Prince William Forest Park Pu'ukohola Heiau National Historic Site Quivira National Wildlife Refuge Redwood National Park Richmond National Battlefield Park Rio Grande Wild and Scenic River Rock Creek Park Rocky Mountain Arsenal National Wildlife Refuge Rocky Mountain National Park Roosevelt-Vanderbilt National Historic Sites Ruby Lake National Wildlife Refuge Saguaro National Park Saint Croix National Scenic Riverway Saint-Gaudens National Historic Site San Juan Island National Historical Park Santa Monica Mountains National Recreation Area Seedskadee National Wildlife Refuge Sequoia and Kings Canyon National Parks Shenandoah National Park Sleeping Bear Dunes National Lakeshore Sonny Bono Salton Sea National Wildlife Refuge St. Marks National Wildlife Refuge Sudbury, Assabet and Concord Wild and Scenic Rivers Tallgrass Prairie National Preserve Timucuan Ecological and Historic Preserve Tonto National Monument Tumacacori National Historical Park Tuzigoot National Monument Two Ponds National Wildlife Refuge UL Bend National Wildlife Refuge USGS:5b92cffce4b0702d0e80a2d5 University of Wisconsin Arboretum National Historic Landmark Upper Delaware National Scenic and Recreational River Valentine National Wildlife Refuge Valle de Oro National Wildlife Refuge Valles Caldera National Preserve Vieques National Wildlife Refuge Virgin Islands National Park Voyageurs National Park War In The Pacific National Historical Park Weir Farm National Historical Park Wekiva Wild and Scenic River White Mountain National Forest White Sands National Park Wichita Mountains National Wildlife Refuge Wind Cave National Park Women’s Rights National Historical Park Wrangell-St. Elias National Park and Preserve Yellowstone National Park Yosemite National Park Yucca House National Monument Yukon - Charley Rivers National Preserve Zion National Park biomarkers biota ecotoxicology environment inlandWaters mercury contamination protected areas