CONCORD, Mass.  Henry David Thoreau was jailed here 164 years ago for refusing to pay taxes while living at Walden Pond. Now the town has Jean Hill to contend with.

Mrs. Hill, an octogenarian previously best known for her blueberry jam, proposed banning the sale of bottled water here at a town meeting this spring. Voters approved, with the intent of making Concord the first town in the nation to strip Aquafina, Poland Spring and the like from its stores.

In orchestrating an outright ban, Mrs. Hill, 82, has achieved something that powerful environmental groups have not even tried. The bottled water industry is not pleased; it has threatened to sue if the ban takes effect as planned on Jan. 1. Officials here have hinted that they might not strictly enforce it, but Mrs. Hill, who described herself as obsessed, said that would only deepen her resolve.

“I’m going to work until I drop on this,” she said. “If you believe in something, you have to persist and you have to have a thick skin.”