DON'T POUR IT DOWN THE DRAIN, IT CAN 
CONTAMINATE YOUR GROUND WATER !!!

Clean Valley Council, Inc.

Here are some tips for left over paint. 

• First, has it frozen? If yes - you can't use it again.
  We call it buttermilk, it is now no longer any good.- it has frozen. 
• If not... put a good amount in a glass jar to keep
  handy inside for touch ups. Sponge the paint 
  on instead of brushing or washing. Great for finger prints 
  in halls; you are adding paint instead of washing it off. 
• If you are a keeper of paint in the can, seal the lid well and place upside down for a better seal. It will keep better. The skin that forms will be on the bottom when you open it. 
• Use it up. 
• Give it away to the church or local theater.
• Recycle through your local household hazardous waste day.
  ( This is your answer for oil base paints.)
• Dry up your latex paint for a final resolution,  leave it open and toss when dry with the lid off  into the trash it is now a solid. Keep it somewhere away from pets and children. You can speed up the drying process with sawdust or kitty litter.
• Now, don't over buying paint and keep it in a moderate tempertured site for reuse.
• Organize a neighborhood paint swap one Saturday afternoon. It is a good way to get just what you want for that bookcase that needs painting! A good time is after the neighborhood litter clean up day