Renee, they are suppose to be changed every 2 mo. or 30 -40 gal. or so. Walgreens carries them in 3 packs
Here's detail:
This filter's activated carbon and ion exchange resin work together to transform ordinary tap water into healthier, great-tasting drinking water. Better for the environment and your wallet: One filter can replace as many as 300 standard 16.9 oz plastic water bottles.
Fits in all Brita pitchers and dispensers
Reduces harmful contaminants
Keeps a healthy level of fluoride, a water additive that promotes strong teeth (applies to fluoridated municipal tap water)
Reduces chlorine (taste and odor), mercury, copper, zinc (metallic taste) and more
This product reduces the following harmful contaminants that may be in your tap water
Copper: Source: Corrosion of household plumbing systems, erosion of natural deposits. Potential health effects: Short-term, gastrointestinal distress. Long-term: Liver or kidney damage
Mercury: Source: Erosion of natural deposits, runoff from landfills and cropland. Potential health effects: Kidney damage
Cadmium: Source: Corrosion of galvanized pipes, runoff from waste batteries and paints. Potential health effects: Kidney damage
