Noe Valley’s simple wish to get a public bathroom installed in its treasured Town Square appears to be circling the drain — with even Gov. Gavin Newsom wading into the spat over its projected $1.7 million cost.

Newsom’s office told me that the state funds tagged for the single toilet in 150 square feet of space would not be forthcoming considering the stomach-churning price tag.

“A single, small bathroom should not cost $1.7 million,” Erin Mellon, the governor’s communications director, wrote in a statement. “The state will hold funding until San Francisco delivers a plan to use this public money more efficiently. If they cannot, we will go back to the legislature to revoke this appropriation.”