Hydrographic & Impairment Statistics

The Hydrographic and Impairment Statistics (HIS) database provides summary statistics of surface hydrography (acres of lakes, miles of streams, etc.) within and adjacent to each national park unit using the U.S. Geological Survey's (USGS) high resolution National Hydrography Dataset (NHD), the NPS Administrative Park Boundary Dataset, and other sources. Information regarding water impairments are supplied by state management agencies and attributed to NHD to derive impairment statistics for each national park unit. Impaired waters are identified by the State according to the federal Clean Water Act (CWA) Sections 303(d) and 305(b). Using the functionality below you can obtain an estimate of the total miles of waterway (rivers, streams, canals, etc.), acreage of waterbodies (lakes, reservoirs, ocean, etc.), number of lakes, the acreage of icemass, and much more about any national park unit or summarized across the entire National Park System. You can also see which parks contain CWA impaired hydrography, which parks have no hydrography, and which parks are 'coastal'.

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Search the HIS Database

Last update: January 17, 2013

View hydrographic and impairment statistics by park, region, or network.

-- Servicewide -- Abraham Lincoln Birthplace National Historic Site Acadia National Park Adams National Historical Park African Burial Ground National Monument Agate Fossil Beds National Monument Alagnak Wild River Alaska Region Alibates Flint Quarries National Monument Allegheny Portage Railroad National Historic Site American Memorial Park Amistad National Recreation Area Andersonville National Historic Site Andrew Johnson National Historic Site Aniakchak National Monument Antietam National Battlefield Apostle Islands National Lakeshore Appalachian Highlands Network Appalachian National Scenic Trail Appomattox Court House National Historical Park Arches National Park Arctic Network Arkansas Post National Memorial Arlington House / The Robert E. Lee National Memorial Assateague Island National Seashore Aztec Ruins National Monument Badlands National Park Bandelier National Monument Benjamin Franklin National Memorial Bent's Old Fort National Historic Site Bering Land Bridge National Preserve Big Bend National Park Big Cypress National Preserve Big Hole National Battlefield Big South Fork National River and Recreation Area Big Thicket National Preserve Bighorn Canyon National Recreation Area Biscayne National Park Black Canyon Of The Gunnison National Park Blue Ridge Parkway Bluestone National Scenic River Booker T. Washington National Monument Boston African American National Historic Site Boston Harbor Islands National Recreation Area Boston National Historical Park Brices Cross Roads National Battlefield Site Brown v. Board Of Education National Historic Site Bryce Canyon National Park Buck Island Reef National Monument Buffalo National River Cabrillo National Monument Canaveral National Seashore Cane River Creole National Historical Park Canyon De Chelly National Monument Canyonlands National Park Cape Cod National Seashore Cape Hatteras National Seashore Cape Krusenstern National Monument Cape Lookout National Seashore Capitol Reef National Park Capulin Volcano National Monument Carl Sandburg Home National Historic Site Carlsbad Caverns National Park Carter G. Woodson National Historic Site Casa Grande Ruins National Monument Castillo De San Marcos National Monument Castle Clinton National Monument Catoctin Mountain Park Cedar Breaks National Monument Cedar Creek and Belle Grove National Historical Park Central Alaska Network Central High School National Historic Site Chaco Culture National Historical Park Chamizal National Memorial Channel Islands National Park Charles Pinckney National Historic Site Chattahoochee River National Recreation Area Chesapeake and Ohio Canal National Historical Park Chickamauga & Chattanooga National Military Park Chickasaw National Recreation Area Chihuahuan Desert Network Chimney Rock National Historic Site Chiricahua National Monument Christiansted National Historic Site City of Rocks National Reserve Clara Barton National Historic Site Colonial National Historical Park Colorado National Monument Congaree National Park Constitution Gardens Coronado National Memorial Cowpens National Battlefield Crater Lake National Park Craters of the Moon National Monument Cumberland Gap National Historical Park Cumberland Island National Seashore Cumberland Piedmont Network Curecanti National Recreation Area Cuyahoga Valley National Park Dayton Aviation Heritage National Historical Park De Soto National Memorial Death Valley National Park Delaware National Scenic River Delaware Water Gap National Recreation Area Denali National Park Devils Postpile National Monument Devils Tower National Monument Dinosaur National Monument Dry Tortugas National Park Eastern Rivers and Mountains Network Ebey's Landing National Historical Reserve Edgar Allan Poe National Historic Site Edison National Historic Site Effigy Mounds National Monument Eisenhower National Historic Site El Malpais National Monument El Morro National Monument Eleanor Roosevelt National Historic Site Eugene O'Neill National Historic Site Everglades National Park Federal Hall National Memorial Fire Island National Seashore First Ladies National Historic Site Flight 93 National Memorial Florissant Fossil Beds National Monument Ford's Theatre National Historic Site Fort Bowie National Historic Site Fort Caroline National Memorial Fort Davis National Historic Site Fort Donelson National Battlefield Fort Frederica National Monument Fort Laramie National Historic Site Fort Larned National Historic Site Fort Matanzas National Monument Fort McHenry National Monument and Historic Shrine Fort Monroe National Monument Fort Necessity National Battlefield Fort Point National Historic Site Fort Pulaski National Monument Fort Raleigh National Historic Site Fort Scott National Historic Site Fort Smith National Historic Site Fort Stanwix National Monument Fort Sumter National Monument Fort Union National Monument Fort Union Trading Post National Historic Site Fort Vancouver National Historic Site Fort Washington Park Fossil Butte National Monument Franklin Delano Roosevelt Memorial Frederick Douglass National Historic Site Frederick Law Olmsted National Historic Site Fredericksburg & Spotsylvania National Military Park Fredericksburg National Cemetery Friendship Hill National Historic Site Gates of the Arctic National Park Gateway National Recreation Area Gauley River National Recreation Area General Grant National Memorial George Rogers Clark National Historical Park George Washington Birthplace National Monument George Washington Carver National Monument George Washington Memorial Parkway Gettysburg National Military Park Gila Cliff Dwellings National Monument Glacier Bay National Park Glacier National Park Glen Canyon National Recreation Area Gloria Dei (Old Swedes') Church National Historic Site Golden Gate National Recreation Area Golden Spike National Historic Site Governors Island National Monument Grand Canyon National Park Grand Portage National Monument Grand Teton National Park Grant-Kohrs Ranch National Historic Site Great Basin National Park Great Lakes Network Great Sand Dunes National Park Great Smoky Mountains National Park Greater Yellowstone Network Green Springs National Historic Landmark District Greenbelt Park Guadalupe Mountains National Park Guilford Courthouse National Military Park Gulf Coast Network Gulf Islands National Seashore Hagerman Fossil Beds National Monument Haleakala National Park Hamilton Grange National Memorial Hampton National Historic Site Harpers Ferry National Historical Park Harry S. Truman National Historic Site Hawaii Volcanoes National Park Heartland Network Herbert Hoover National Historic Site Hohokam Pima National Monument Home of Franklin D. Roosevelt National Historic Site Homestead National Monument of America Hopewell Culture National Historical Park Hopewell Furnace National Historic Site Horseshoe Bend National Military Park Hot Springs National Park Hovenweep National Monument Hubbell Trading Post National Historic Site Ice Age National Historic Trail Illinois & Michigan Canal National Heritage Corridor Independence National Historical Park Indiana Dunes National Lakeshore Intermountain Region International Peace Garden Isle Royale National Park James A. Garfield National Historic Site Jean Lafitte National Historical Park and Preserve Jefferson National Expansion Memorial National Memorial Jewel Cave National Monument Jimmy Carter National Historic Site John D. Rockefeller Jr. Memorial Parkway John Day Fossil Beds National Monument John F. Kennedy Center for Performing Arts John Fitzgerald Kennedy National Historic Site John Muir National Historic Site Johnstown Flood National Memorial Joshua Tree National Park Kalaupapa National Historical Park Kaloko-Honokohau National Historical Park Katmai National Park Kenai Fjords National Park Kennesaw Mountain National Battlefield Park Keweenaw National Historical Park Kings Canyon National Park Kings Mountain National Military Park Klamath Network Klondike Gold Rush National Historical Park Knife River Indian Villages National Historic Site Kobuk Valley National Park Korean War Veterans Memorial Lake Chelan National Recreation Area Lake Clark National Park Lake Mead National Recreation Area Lake Meredith National Recreation Area Lake Roosevelt National Recreation Area Lassen Volcanic National Park Lava Beds National Monument Lewis & Clark National Historic Trail Lewis and Clark National Historical Park Lincoln Boyhood National Memorial Lincoln Home National Historic Site Lincoln Memorial Little Bighorn Battlefield National Monument Little River Canyon National Preserve Longfellow National Historic Site Lowell National Historical Park Lyndon B. Johnson National Historical Park Lyndon Baines Johnson Memorial Grove on the Potomac National Memorial Maggie L. Walker National Historic Site Mammoth Cave National Park Manassas National Battlefield Park Manzanar National Historic Site Marsh-Billings-Rockefeller National Historical Park Martin Luther King, Jr National Historic Site Martin Luther King, Jr. Memorial Martin Van Buren National Historic Site Mary McLeod Bethune Council House National Historic Site McLoughlin House National Historical Site Mediterranean Coast Network Mesa Verde National Park Mid-Atlantic Network Midwest Region Minidoka Internment National Monument Minute Man National Historical Park Minuteman Missile National Historic Site Mississippi National River and Recreation Area Missouri National Recreational River Mojave Desert Network Mojave National Preserve Monocacy National Battlefield Montezuma Castle National Monument Moores Creek National Battlefield Morristown National Historical Park Mount Rainier National Park Mount Rushmore National Memorial Muir Woods National Monument Natchez National Historical Park Natchez Trace National Parkway National Capital Parks National Capital Parks - Central National Capital Parks - East National Capital Region National Capital Region Network National Mall National Park of American Samoa National Park Natural Bridges National Monument Navajo National Monument New Bedford Whaling National Historical Park New River Gorge National River Nez Perce National Historical Park Nicodemus National Historic Site Ninety Six National Historic Site Niobrara National Scenic River Noatak National Preserve North Cascades National Park North Coast and Cascades Network Northeast Coastal and Barrier Network Northeast Region Northeast Temperate Network Northern Colorado Plateau Network Northern Great Plains Network Obed Wild and Scenic River Ocmulgee National Monument Oklahoma City National Memorial Olympic National Park Oregon Caves National Monument Organ Pipe Cactus National Monument Ozark National Scenic Riverways Pacific Islands Network Pacific West Region Padre Island National Seashore Palo Alto Battlefield National Historic Site Paterson Great Falls National Historical Park Pea Ridge National Military Park Pecos National Historical Park Pennsylvania Avenue National Historic Site Perry's Victory and International Peace Memorial Petersburg National Battlefield Petrified Forest National Park Petroglyph National Monument Pictured Rocks National Lakeshore Pinnacles National Monument Pipe Spring National Monument Pipestone National Monument Piscataway Park Point Reyes National Seashore Port Chicago Naval Magazine National Memorial Poverty Point National Monument President William Jefferson Clinton Birthplace Home National Historic Site Presidio of San Francisco Prince William Forest Park Pu'uhonua o Honaunau National Historical Park Puukohola Heiau National Historic Site Rainbow Bridge National Monument Redwood National Park and State Parks Richmond National Battlefield Park Rio Grande Wild and Scenic River River Raisin National Battlefield Park Rock Creek Park Rocky Mountain National Park Rocky Mountain Network Roger Williams National Memorial Ronald Reagan Boyhood Home National Historic Site Rosie the Riveter WWII Home Front National Historical Park Ross Lake National Recreation Area Russell Cave National Monument Sagamore Hill National Historic Site Saguaro National Park Saint Croix Island International Historic Site Saint Croix National Scenic River Saint Paul's Church National Historic Site Saint-Gaudens National Historic Site Salem Maritime National Historic Site Salinas Pueblo Missions National Monument Salt River Bay National Historical Park and Ecological Preserve San Antonio Missions National Historical Park San Francisco Bay Area Network San Francisco Maritime National Historical Park San Juan Island National Historical Park San Juan National Historic Site Sand Creek Massacre National Historic Site Santa Monica Mountains National Recreation Area Saratoga National Historical Park Saugus Iron Works National Historic Site Scotts Bluff National Monument Selma to Montgomery National Historic Trail Sequoia National Park Shenandoah National Park Shiloh National Military Park Sierra Nevada Network Sitka National Historical Park Sleeping Bear Dunes National Lakeshore Sonoran Desert Network South Florida/Caribbean Network Southeast Alaska Network Southeast Coast Network Southeast Region Southern Colorado Plateau Network Southern Plains Network Southwest Alaska Network Springfield Armory National Historic Site Statue of Liberty National Monument Steamtown National Historic Site Stones River National Battlefield Sunset Crater Volcano National Monument Tallgrass Prairie National Preserve Thaddeus Kosciuszko National Memorial Theodore Roosevelt Birthplace National Historic Site Theodore Roosevelt Inaugural National Historic Site Theodore Roosevelt Island National Memorial Theodore Roosevelt National Park Thomas Jefferson Memorial Thomas Stone National Historic Site Timpanogos Cave National Monument Timucuan Ecological & Historic Preserve Tonto National Monument Touro Synagogue National Historic Site Tumacacori National Historical Park Tupelo National Battlefield Tuskegee Airman National Historic Site Tuskegee Institute National Historic Site Tuzigoot National Monument Ulysses S. Grant National Historic Site Upper Columbia Basin Network Upper Delaware National Scenic and Recreation River Valley Forge National Historical Park Vanderbilt Mansion National Historic Site Vicksburg National Military Park Vietnam Veterans Memorial Virgin Islands Coral Reef National Monument Virgin Islands National Park Voyageurs National Park Walnut Canyon National Monument War In The Pacific National Historical Park Washington Monument Washita Battlefield National Historic Site Weir Farm National Historic Site Whiskeytown National Recreation Area White House (President's Park) White Sands National Monument Whitman Mission National Historic Site William Howard Taft National Historic Site Wilson's Creek National Battlefield Wind Cave National Park Wolf Trap National Park for the Performing Arts Women's Rights National Historical Park World War II Memorial World War II Valor in the Pacific National Monument Wrangell - St Elias National Park Wright Brothers National Memorial Wupatki National Monument Yellowstone National Park Yosemite National Park Yucca House National Monument Yukon - Charley Rivers National Preserve Zion National Park

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View park statistics in descending order by selecting a featured category.

Step 1: Pick a category: --category--
Step 2: Pick a statistic:   --statistic--
Step 3:

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View impairment statistics by park for different types of impairment.

Step 1: Pick a type of impairment:  --Parents Impairment--
Step 2: Pick a specific impairment: --impairment--
Step 3:

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View related park reports.

Parks with 303(d) impairments Parks with no hydrography Parks defined as coastal

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Learn how statistics were created.

• Methods - Summary of the methods used to generate hydrographic statistics
• Caveats - Supplemental explanations of procedures used to generate hydrographic statistics
• Data Sources - Select a park below to view data sources

Abraham Lincoln Birthplace National Historic Site Acadia National Park Adams National Historical Park African Burial Ground National Monument Agate Fossil Beds National Monument Alagnak Wild River Alibates Flint Quarries National Monument Allegheny Portage Railroad National Historic Site American Memorial Park Amistad National Recreation Area Andersonville National Historic Site Andrew Johnson National Historic Site Aniakchak National Monument Antietam National Battlefield Apostle Islands National Lakeshore Appalachian National Scenic Trail Appomattox Court House National Historical Park Arches National Park Arkansas Post National Memorial Arlington House / The Robert E. Lee National Memorial Assateague Island National Seashore Aztec Ruins National Monument Badlands National Park Bandelier National Monument Benjamin Franklin National Memorial Bent's Old Fort National Historic Site Bering Land Bridge National Preserve Big Bend National Park Big Cypress National Preserve Big Hole National Battlefield Big South Fork National River and Recreation Area Big Thicket National Preserve Bighorn Canyon National Recreation Area Biscayne National Park Black Canyon Of The Gunnison National Park Blue Ridge Parkway Bluestone National Scenic River Booker T. Washington National Monument Boston African American National Historic Site Boston Harbor Islands National Recreation Area Boston National Historical Park Brices Cross Roads National Battlefield Site Brown v. Board Of Education National Historic Site Bryce Canyon National Park Buck Island Reef National Monument Buffalo National River Cabrillo National Monument Canaveral National Seashore Cane River Creole National Historical Park Canyon De Chelly National Monument Canyonlands National Park Cape Cod National Seashore Cape Hatteras National Seashore Cape Krusenstern National Monument Cape Lookout National Seashore Capitol Reef National Park Capulin Volcano National Monument Carl Sandburg Home National Historic Site Carlsbad Caverns National Park Carter G. Woodson National Historic Site Casa Grande Ruins National Monument Castillo De San Marcos National Monument Castle Clinton National Monument Catoctin Mountain Park Cedar Breaks National Monument Cedar Creek and Belle Grove National Historical Park Central High School National Historic Site Chaco Culture National Historical Park Chamizal National Memorial Channel Islands National Park Charles Pinckney National Historic Site Chattahoochee River National Recreation Area Chesapeake and Ohio Canal National Historical Park Chickamauga & Chattanooga National Military Park Chickasaw National Recreation Area Chimney Rock National Historic Site Chiricahua National Monument Christiansted National Historic Site City of Rocks National Reserve Clara Barton National Historic Site Colonial National Historical Park Colorado National Monument Congaree National Park Constitution Gardens Coronado National Memorial Cowpens National Battlefield Crater Lake National Park Craters of the Moon National Monument Cumberland Gap National Historical Park Cumberland Island National Seashore Curecanti National Recreation Area Cuyahoga Valley National Park Dayton Aviation Heritage National Historical Park De Soto National Memorial Death Valley National Park Delaware National Scenic River Delaware Water Gap National Recreation Area Denali National Park Devils Postpile National Monument Devils Tower National Monument Dinosaur National Monument Dry Tortugas National Park Ebey's Landing National Historical Reserve Edgar Allan Poe National Historic Site Edison National Historic Site Effigy Mounds National Monument Eisenhower National Historic Site El Malpais National Monument El Morro National Monument Eleanor Roosevelt National Historic Site Eugene O'Neill National Historic Site Everglades National Park Federal Hall National Memorial Fire Island National Seashore First Ladies National Historic Site Flight 93 National Memorial Florissant Fossil Beds National Monument Ford's Theatre National Historic Site Fort Bowie National Historic Site Fort Caroline National Memorial Fort Davis National Historic Site Fort Donelson National Battlefield Fort Frederica National Monument Fort Laramie National Historic Site Fort Larned National Historic Site Fort Matanzas National Monument Fort McHenry National Monument and Historic Shrine Fort Monroe National Monument Fort Necessity National Battlefield Fort Point National Historic Site Fort Pulaski National Monument Fort Raleigh National Historic Site Fort Scott National Historic Site Fort Smith National Historic Site Fort Stanwix National Monument Fort Sumter National Monument Fort Union National Monument Fort Union Trading Post National Historic Site Fort Vancouver National Historic Site Fort Washington Park Fossil Butte National Monument Franklin Delano Roosevelt Memorial Frederick Douglass National Historic Site Frederick Law Olmsted National Historic Site Fredericksburg & Spotsylvania National Military Park Fredericksburg National Cemetery Friendship Hill National Historic Site Gates of the Arctic National Park Gateway National Recreation Area Gauley River National Recreation Area General Grant National Memorial George Rogers Clark National Historical Park George Washington Birthplace National Monument George Washington Carver National Monument George Washington Memorial Parkway Gettysburg National Military Park Gila Cliff Dwellings National Monument Glacier Bay National Park Glacier National Park Glen Canyon National Recreation Area Gloria Dei (Old Swedes') Church National Historic Site Golden Gate National Recreation Area Golden Spike National Historic Site Governors Island National Monument Grand Canyon National Park Grand Portage National Monument Grand Teton National Park Grant-Kohrs Ranch National Historic Site Great Basin National Park Great Sand Dunes National Park Great Smoky Mountains National Park Green Springs National Historic Landmark District Greenbelt Park Guadalupe Mountains National Park Guilford Courthouse National Military Park Gulf Islands National Seashore Hagerman Fossil Beds National Monument Haleakala National Park Hamilton Grange National Memorial Hampton National Historic Site Harpers Ferry National Historical Park Harry S. Truman National Historic Site Hawaii Volcanoes National Park Herbert Hoover National Historic Site Hohokam Pima National Monument Home of Franklin D. Roosevelt National Historic Site Homestead National Monument of America Hopewell Culture National Historical Park Hopewell Furnace National Historic Site Horseshoe Bend National Military Park Hot Springs National Park Hovenweep National Monument Hubbell Trading Post National Historic Site Ice Age National Historic Trail Illinois & Michigan Canal National Heritage Corridor Independence National Historical Park Indiana Dunes National Lakeshore International Peace Garden Isle Royale National Park James A. Garfield National Historic Site Jean Lafitte National Historical Park and Preserve Jefferson National Expansion Memorial National Memorial Jewel Cave National Monument Jimmy Carter National Historic Site John D. Rockefeller Jr. Memorial Parkway John Day Fossil Beds National Monument John F. Kennedy Center for Performing Arts John Fitzgerald Kennedy National Historic Site John Muir National Historic Site Johnstown Flood National Memorial Joshua Tree National Park Kalaupapa National Historical Park Kaloko-Honokohau National Historical Park Katmai National Park Kenai Fjords National Park Kennesaw Mountain National Battlefield Park Keweenaw National Historical Park Kings Canyon National Park Kings Mountain National Military Park Klondike Gold Rush National Historical Park Knife River Indian Villages National Historic Site Kobuk Valley National Park Korean War Veterans Memorial Lake Chelan National Recreation Area Lake Clark National Park Lake Mead National Recreation Area Lake Meredith National Recreation Area Lake Roosevelt National Recreation Area Lassen Volcanic National Park Lava Beds National Monument Lewis & Clark National Historic Trail Lewis and Clark National Historical Park Lincoln Boyhood National Memorial Lincoln Home National Historic Site Lincoln Memorial Little Bighorn Battlefield National Monument Little River Canyon National Preserve Longfellow National Historic Site Lowell National Historical Park Lyndon B. Johnson National Historical Park Lyndon Baines Johnson Memorial Grove on the Potomac National Memorial Maggie L. Walker National Historic Site Mammoth Cave National Park Manassas National Battlefield Park Manzanar National Historic Site Marsh-Billings-Rockefeller National Historical Park Martin Luther King, Jr National Historic Site Martin Luther King, Jr. Memorial Martin Van Buren National Historic Site Mary McLeod Bethune Council House National Historic Site McLoughlin House National Historical Site Mesa Verde National Park Minidoka Internment National Monument Minute Man National Historical Park Minuteman Missile National Historic Site Mississippi National River and Recreation Area Missouri National Recreational River Mojave National Preserve Monocacy National Battlefield Montezuma Castle National Monument Moores Creek National Battlefield Morristown National Historical Park Mount Rainier National Park Mount Rushmore National Memorial Muir Woods National Monument Natchez National Historical Park Natchez Trace National Parkway National Capital Parks National Capital Parks - Central National Capital Parks - East National Mall National Park of American Samoa National Park Natural Bridges National Monument Navajo National Monument New Bedford Whaling National Historical Park New River Gorge National River Nez Perce National Historical Park Nicodemus National Historic Site Ninety Six National Historic Site Niobrara National Scenic River Noatak National Preserve North Cascades National Park Obed Wild and Scenic River Ocmulgee National Monument Oklahoma City National Memorial Olympic National Park Oregon Caves National Monument Organ Pipe Cactus National Monument Ozark National Scenic Riverways Padre Island National Seashore Palo Alto Battlefield National Historic Site Paterson Great Falls National Historical Park Pea Ridge National Military Park Pecos National Historical Park Pennsylvania Avenue National Historic Site Perry's Victory and International Peace Memorial Petersburg National Battlefield Petrified Forest National Park Petroglyph National Monument Pictured Rocks National Lakeshore Pinnacles National Monument Pipe Spring National Monument Pipestone National Monument Piscataway Park Point Reyes National Seashore Port Chicago Naval Magazine National Memorial Poverty Point National Monument President William Jefferson Clinton Birthplace Home National Historic Site Presidio of San Francisco Prince William Forest Park Pu'uhonua o Honaunau National Historical Park Puukohola Heiau National Historic Site Rainbow Bridge National Monument Redwood National Park and State Parks Richmond National Battlefield Park Rio Grande Wild and Scenic River River Raisin National Battlefield Park Rock Creek Park Rocky Mountain National Park Roger Williams National Memorial Ronald Reagan Boyhood Home National Historic Site Rosie the Riveter WWII Home Front National Historical Park Ross Lake National Recreation Area Russell Cave National Monument Sagamore Hill National Historic Site Saguaro National Park Saint Croix Island International Historic Site Saint Croix National Scenic River Saint Paul's Church National Historic Site Saint-Gaudens National Historic Site Salem Maritime National Historic Site Salinas Pueblo Missions National Monument Salt River Bay National Historical Park and Ecological Preserve San Antonio Missions National Historical Park San Francisco Maritime National Historical Park San Juan Island National Historical Park San Juan National Historic Site Sand Creek Massacre National Historic Site Santa Monica Mountains National Recreation Area Saratoga National Historical Park Saugus Iron Works National Historic Site Scotts Bluff National Monument Selma to Montgomery National Historic Trail Sequoia National Park Shenandoah National Park Shiloh National Military Park Sitka National Historical Park Sleeping Bear Dunes National Lakeshore Springfield Armory National Historic Site Statue of Liberty National Monument Steamtown National Historic Site Stones River National Battlefield Sunset Crater Volcano National Monument Tallgrass Prairie National Preserve Thaddeus Kosciuszko National Memorial Theodore Roosevelt Birthplace National Historic Site Theodore Roosevelt Inaugural National Historic Site Theodore Roosevelt Island National Memorial Theodore Roosevelt National Park Thomas Jefferson Memorial Thomas Stone National Historic Site Timpanogos Cave National Monument Timucuan Ecological & Historic Preserve Tonto National Monument Touro Synagogue National Historic Site Tumacacori National Historical Park Tupelo National Battlefield Tuskegee Airman National Historic Site Tuskegee Institute National Historic Site Tuzigoot National Monument Ulysses S. Grant National Historic Site Upper Delaware National Scenic and Recreation River Valley Forge National Historical Park Vanderbilt Mansion National Historic Site Vicksburg National Military Park Vietnam Veterans Memorial Virgin Islands Coral Reef National Monument Virgin Islands National Park Voyageurs National Park Walnut Canyon National Monument War In The Pacific National Historical Park Washington Monument Washita Battlefield National Historic Site Weir Farm National Historic Site Whiskeytown National Recreation Area White House (President's Park) White Sands National Monument Whitman Mission National Historic Site William Howard Taft National Historic Site Wilson's Creek National Battlefield Wind Cave National Park Wolf Trap National Park for the Performing Arts Women's Rights National Historical Park World War II Memorial World War II Valor in the Pacific National Monument Wrangell - St Elias National Park Wright Brothers National Memorial Wupatki National Monument Yellowstone National Park Yosemite National Park Yucca House National Monument Yukon - Charley Rivers National Preserve Zion National Park

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More Information

• EPA Watershed Assessment, Tracking, and Environmental Results (WATERS)
• USGS National Hydrography Dataset