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Filtering the kitchen tap may be enough, but what about the waste water?
A point-of-use filter seems like a narrower solution when the concern is drinking and cooking water, but I’m not sure how much that changes cartridge use or water waste compared with filtering the whole supply. It depends on what’s actually in the water and how each system works.
Which contaminants would you want a utility report or water test to identify before choosing? I’d also compare the cartridge replacement schedule and any rinse or reject water, especially for systems that use reverse osmosis. Certifications are specific to the contaminants a filter is tested to reduce, and faucet compatibility can vary too.
Does a kitchen-only setup usually make more sense when the concern is limited to water used for drinking and cooking, or are there cases where whole-house filtration is worth the extra maintenance and water use?
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If a test confirmed a concern that also matters for bathing or laundry - not just drinking and cooking - and a suitable whole-house system could address it, that would make whole-house treatment more compelling. I’d still weigh that benefit against the added equipment and maintenance rather than assuming broader coverage is automatically better.
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