America’s most endangered rivers in 2021

3. Boundary

Waters, Minn.

1. Snake

River

2. Lower

Missouri

River

9. Raccoon

River, Iowa

8. Ipswich

River,

Mass.

7. McCloud

River, Calif.

5. Pecos

River, NM

6. Tar Creek,

Okla.

4. South

Creek, Ga.

10. Turkey

Creek, Miss.

3. Boundary

Waters, Minn.

1. Snake

River

7. McCloud

River, Calif.

9. Raccoon

River, Iowa

8. Ipswich

River,

Mass.

2. Lower

Missouri

River

6. Tar Creek,

Okla.

5. Pecos

River, NM

4. South

Creek, Ga.

10. Turkey

Creek, Miss.

1. Snake

River

3. Boundary

Waters, Minn.

2. Lower

Missouri

River

9. Raccoon

River, Iowa

8. Ipswich

River,

Mass.

7. McCloud

River, Calif.

6. Tar Creek,

Okla.

4. South

Creek, Ga.

5. Pecos

River, NM

10. Turkey

Creek, Miss.

3. Boundary

Waters, Minn.

1. Snake

River

7. McCloud

River, Calif.

8. Ipswich

River,

Mass.

9. Raccoon

River, Iowa

2. Lower

Missouri

River

6. Tar Creek,

Okla.

5. Pecos

River, NM

4. South

Creek, Ga.

10. Turkey

Creek, Miss.

3. Boundary

Waters, Minn.

1. Snake

River

8. Ipswich

River,

Mass.

9. Raccoon

River, Iowa

7. McCloud

River, Calif.

2. Lower

Missouri

River

6. Tar Creek,

Okla.

5. Pecos

River, NM

4. South

Creek, Ga.

10. Turkey

Creek, Miss.

3. Boundary

Waters, Minn.

1. Snake

River

9. Raccoon

River, Iowa

8. Ipswich

River,

Mass.

7. McCloud

River, Calif.

2. Lower

Missouri

River

6. Tar Creek,

Okla.

5. Pecos

River, NM

4. South

Creek, Ga.

10. Turkey

Creek, Miss.

Guardian graphic. | Source: American Rivers 2021 “America’s Most Endangered Rivers” Report and the US Geological Survey.

Note: The Snake River traverses multiple states, including Idaho, Washington, and Oregon. The Lower Missouri River traverses multiple states, including Iowa, Kansas, Missouri, and Nebraska.