Purchasing mistakes, changing skin tones and lapses in expiration dates can leave you with a drawer full of unwanted makeup. However, before you toss that expired or unwanted product, you should consider the eco-toxological effects you may trigger. Some waste water-treatment plants have a difficult time breaking down personal care products to safe levels. Even an innocent-looking tube of lipstick can contain petrochemicals that contaminate groundwater. Since cosmetics do expire, you should throw them away when necessary; but purge your vanity table safely.
Write the purchase date on the product with a permanent marker to track the expiration. Powder-based products last two to three years and do not need to be tossed as frequently. Lipsticks and liners remain good for one to two years, but eye products need replacing every few months. If your product comes with a visible expiration date, it's better to follow the suggested date.
Pour all unwanted liquid makeup into one jar to control potential landfill leaching.
Make sure the lid fits tightly. Place the product in your household garbage can for disposal. If you prefer, contact your area's household-hazardous waste program for specific directions on packaging leftover cosmetics. Some stations have drop off locations available for green customers.