Can the moon turn red even without an eclipse?
Yes, pollution from (for example) wildfires can cause the moon to appear red. It is normally not noticed unless the moon is low in the sky.

Earthsky magazine is reporting that red sunsets and red moons are being reported across the USA. caused by wildfires. Even when the moon is quite high in the sky. I believe that fires from logging in the jungles of Borneo and the Philippines can have the same effect.

This has also been answered on https://earthscience.stackexchange.com/questions/12223/why-were-both-the-sun-and-the-moon-red-today