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The states listed are home to industries that reported dumping toxins into these rivers.

1. Ohio River (Illinois, Indiana, Kentucky, Ohio, Pennsylvania, West Virginia) — 32.1 million pounds

2. Mississippi River (Arkansas, Iowa, Illinois, Kentucky, Louisiana, Minnesota, Missouri, Mississippi, Tennessee, Wisconsin) — 12.7 million pounds.

3. New River (North Carolina, Virginia) — 12.5 million pounds.

4. Savannah River (Georgia, South Carolina) — 9.6 million pounds.

5. Delaware River (Delaware, New Jersey, Pennsylvania) — 6.7 million pounds.

6. Muskingum River (Ohio) — 5.8 million pounds.

7. Missouri River (Iowa, Kansas, Missouri, North Dakota, Nebraska) — 4.9 million pounds.

8. Shonka Ditch (Nebraska) — 4.6 million pounds.

9. Tricounty Canal (Nebraska) — 3.4 million pounds.

10. Rock River (Illinois, Wisconsin) — 3.4 million pounds.

Source: Environment Missouri

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