You need a filter if your tap water smells like a swimming pool, tastes metallic, or has a cloudy appearance. This is your go-to for instant drinking water improvement. A countertop pitcher or an under-sink filter will do the job beautifully.
Practical tip: If your water tastes “earthy” or “fishy,” that’s usually organic matter or algae byproducts. A simple activated carbon filter handles that remarkably well. It’s the difference between “eau de tap” and “eau de pristine mountain stream.”
Filters are also your ally for specific contaminants like lead or microplastics. If you live in an older building, check your local water report. You might be surprised what’s sliding through the municipal system.