Bad B horror movie about worms

[rocketsauce]

Help me figure out the name of this movie.

It has to do with a town being overrun by earthworms. Seriously. It's probably a 70s or 80s movie.

In one scene, a girl is getting ready to take a bath. She turns on the water and steps away. Suddenly tons of worms are flowing out of the faucet and the tub gets filled with them. That's the only scene I can remember.