In Louisiana, officials will continue to monitor 84 miles of coastline where oil still washes up, a Coast Guard official said. The area includes mostly barrier islands about 90 miles south of New Orleans, CNN said. The areas are most affected when large weather systems such as Hurricane Isaac in 2012 stir up the ocean floor.
But in other areas, Lt. Cmdr. Natalie Murphy, a Coast Guard spokeswoman, said remediation efforts have returned the coast to "as close to pre-spill conditions as possible."
Environmental groups said they think calling off cleanup efforts is premature.
"We don't want the nation to think this disaster is over when oil washes ashore somewhere along Alabama's 53 miles of beach every day," Casi Callaway, executive director of Mobile Baykeeper, told CNN. She said it will be up to residents and tourists to play "oil spotter" on Alabama's beaches.
The National Wildlife Federation said there are still upwards of 1 million barrels of oil unaccounted for.