Reverse osmosis system vs Filter pitcher
Reverse osmosis removes far more (including fluoride and arsenic) and costs less per gallon over time, but needs an under-sink install. A pitcher is cheapest to start and needs zero setup — fine if you only need lead and taste and are certain your filter is NSF 53 certified for it.
| Reverse osmosis system | Filter pitcher | |
|---|---|---|
| Best for | You want the most thorough filtration — the only common type that removes fluoride, arsenic, and dissolved solids. Accept some water waste. | You want the cheapest way to start, with no installation — ideal for renters and small households. |
| Typical cost per gallon | ~20¢ | ~10¢ |
| Removes fluoride / arsenic | Yes | No |
| Most contaminants certified | up to 17 | up to 13 |
| Installation | Under-sink system with a dedicated faucet and storage tank. | Fill and pour. No installation. |
| Filter changes / year | ~1 | ~6 |
| Certified models we track | 130 | 365 |
Still not sure? The right choice depends on what's actually in your water. Look up your ZIP to see your contaminants, then pick whichever type is certified to remove them at the lowest cost per gallon.
Frequently asked
Is reverse osmosis system or filter pitcher better for lead?
Both can be certified for lead — what matters is the specific model's certification, not the category. Look for NSF/ANSI 53 lead certification on the exact model. We list the certified claim for every filter.
Which is cheaper over time?
Compare cost per gallon, not sticker price. Here, Filter pitcher is typically cheaper per gallon (~10¢ vs ~20¢), because the running cost of replacement cartridges usually outweighs the upfront price.