Practical guide
How to choose a filter for lead
Lead often enters water from service lines, solder, and household plumbing. A point-of-use filter at the kitchen tap is therefore the relevant home-treatment type for drinking and cooking water.
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What to verify
- Look for an accredited third-party certification to NSF/ANSI 53 or NSF/ANSI 58 that specifically lists lead reduction.
- EPA's current consumer tool also recommends particulate reduction Class I under NSF/ANSI 42, because small particles can contain lead.
- Match the exact model and cartridge to the certification listing, and replace the cartridge on schedule.
- Use only cold water for drinking and cooking, and follow your utility's flushing instructions after water has been standing.
A system-wide 90th-percentile value does not predict the concentration at one home. Plumbing materials and water-use patterns differ, so use a certified laboratory if you need a result for your own tap.