WASHINGTON — The Homeland Security Department paid for an underwater robot in a Midwest city with no major rivers or lakes nearby, a hog catcher in rural Texas and a fish tank in a small Texas town, according to a new congressional report highlighting what it described as wasteful spending of tax money intended for counterterrorism purposes.

Sen. Tom Coburn, R-Okla., said in his 54-page report that while much of the spending for the department’s Urban Area Security Initiative appeared to be allowed under the program’s rules, it was still inappropriate in an age of budget austerity and as the federal government faces a $16 trillion national debt.

“Every dollar misspent in the name of security weakens our already precarious economic condition, indebts us to foreign nations, and shackles the future of our children and grandchildren,” Coburn said.

The report focused on UASI spending in the last few years in several states. Among the projects Coburn found questionable were:

• $21 for a fish tank in Seguin, Texas, a small town outside of San Antonio.

• $98,000 for an underwater robot in Columbus, Ohio, where there are no major rivers and few lakes.

• $24,000 for a “latrine on wheels” in Fort Worth, Texas.

• A “BearCat” armored vehicle bought with a $285,933 grant in Keene, N.H., a small New England town that is home to an annual pumpkin festival that draws up to 70,000 people.

• $250,000 for security upgrades, including $9,000 in signage, at Lucas Oil Stadium in Indianapolis.