Texture artifact problem

Hey gang. I've got a problem with texture artifacts.

I'm making a 2D game, and I'm creating tiles by generating a mesh and setting the UVs to tiles in a texture atlas which works fine EXCEPT as the camera moves around, artifacts flicker at the edge of some tiles. I've set the wrap mode of the texture to "Clamp", so I'm not sure what else might be wrong. Does anyone have a solution?