How Brita Pitcher Filters Work: Activated Carbon Basics
Brita filters use granular activated carbon (GAC) derived from coconut shells. Water flows through the carbon media under gravity, and contaminants adsorb onto the carbon surface. The Standard filter uses GAC only. The Longlast+ Elite adds an ion exchange resin layer that captures lead and mercury ions through chemical exchange -- this is the mechanism behind NSF 53 lead certification. The Stream filter uses a unique flow-through design where carbon media sits inside the pitcher lid rather than the reservoir, allowing faster fill at the cost of contact time and contaminant reduction scope.
What Brita Does Not Remove
Brita pitcher filters do not remove: water hardness (calcium and magnesium), nitrates, bacteria, viruses, arsenic, or fluoride. For any of these concerns, Brita is the wrong product category -- reverse osmosis (APEC ROES-50, Waterdrop G3P800), gravity filters (Berkey), or specialty filters (ZeroWater for TDS, Clearly Filtered for PFAS) are the appropriate alternatives. Brita is the right choice when the primary concern is chlorine taste and odor in municipal tap water.
Brita vs. PUR vs. ZeroWater: Which Pitcher Filter to Choose
Brita Longlast+ Elite: best for lead in pre-1986 plumbing + chlorine. PUR Lead Reduction: comparable lead performance, shorter filter life at same cost. ZeroWater ZP-010: removes virtually all TDS including hardness, nitrates, and metals -- but filters clog quickly in high-TDS water and replacement cost is high ($10--$15 per 25-40 gallon filter). For most US municipal water households, Brita Longlast+ Elite provides the best combination of performance, filter life, and value.