BREVARD COUNTY, Fla. – Residents of Brevard County may soon be asked to extend a financial commitment towards the Indian River Lagoon’s cleanup for an additional decade.

On Tuesday, county commissioners are set to revisit discussions about continuing the half-cent sales tax introduced in 2016, which is scheduled to expire on the next Election Day.

Craig Wallace, who chairs the Brevard Indian River Lagoon Coalition, emphasizes that the extensive effort required to rehabilitate the lagoon’s contaminated waters might span several decades.

The tax, initially approved by voters in 2016 following a significant fish mortality event attributed to pollution, is approaching its termination next year.

[WATCH: Updates on efforts to address the fish kill from 2019]

“The experience from restoration efforts in multiple places around the country have been that it takes 20 to 40 years to actually, fully restore an estuary that was impaired as much as this one is,” Wallace said.

Like in 2016, putting a voter referendum on the ballot next Election Day is up to the commission.

Brevard County Community Correspondent James Sparvero heard favorable opinions toward another tax at Manatee Sanctuary Park in Cape Canaveral.

“Just damage that we’re doing, overall, to the environment and to all the species here, I think we’ve gotta do a lot better job,” Sean Hendrickson said.

Ash Dunne backed up Hendrickson’s thoughts, saying the water should be clean.

“Especially in Florida, the water’s kind of our thing,” he said.

[WATCH: ‘Restore our Shores’ works to restore oyster reefs in Indian River Lagoon]

Wallace said the primary result sought from cleanup efforts is restoring seagrass, the food source for manatees.

“Once we get to the point where the water has cleared up enough so the seagrass can regrow again, that’s really gonna be where we say we’re over the hump,” he said.

According to a new lagoon report card from the Marine Resources Council, conditions are gradually improving.

[WATCH: Brevard Zoo team celebrates seagrass milestone crucial to Indian River Lagoon]

When the MRC presented its first report card in 2018, the group said the lagoon’s health was bad.

Now, though, thanks to about $100 million in completed projects, most of the lagoon scored an ‘OK’ grade.