How does lead get into drinking water?

Lead enters drinking water primarily through corrosion of lead-containing plumbing materials — lead service lines, lead solder in copper pipe joints, and brass fixtures. The water itself typically doesn't contain lead when it leaves the treatment plant. It picks up lead as it travels through pipes to your tap, especially when water sits in pipes for several hours (overnight, for example) or when water chemistry is corrosive.

Does boiling water remove lead?

No. Boiling water actually concentrates lead because some water evaporates while the lead remains. If you have lead concerns, use a certified water filter (look for NSF 53 certification for lead removal) or use bottled water for drinking and cooking.

What water filter removes lead?

The most effective options are reverse osmosis systems (95-99% removal) and NSF 53-certified carbon block filters (99%+ removal). Many quality pitcher filters like Clearly Filtered and ZeroWater are certified for lead removal. Standard Brita pitchers with basic carbon filters are NOT effective for lead — you need a filter specifically certified to NSF Standard 53 for lead reduction.

Is there a safe level of lead in water?

No. The EPA, CDC, and WHO all agree there is no safe level of lead exposure. The EPA's Maximum Contaminant Level Goal (MCLG) for lead is zero. The 15 ppb 'action level' is not a safety threshold — it's an administrative trigger that requires utilities to take corrective action when exceeded in more than 10% of sampled homes.

How do I test my water for lead?

The most accurate method is a certified lab test. Companies like Tap Score and SimpleLab offer mail-in lead tests for $30-50. You can also use EPA-listed testing labs in your state. DIY test strips exist but are less precise — they can indicate presence but not exact levels. Test 'first draw' water (first thing in the morning before running the tap) for the most meaningful results.

Does my city have lead in the water?

Most US cities have some homes with lead plumbing — an estimated 6-10 million lead service lines remain in use nationwide. Your city's annual Consumer Confidence Report (CCR) includes lead testing results. However, lead levels vary house by house depending on your specific plumbing, so system-wide data may not reflect your home's exposure. A home water test is the most reliable way to know.

heavy metal

Lead in Drinking Water

Updated: 2026-05-16Written by: TapWaterGuide Editorial Team

What is Lead and is it dangerous in tap water? Lead is a heavy metal contaminant found in drinking water. The EPA maximum contaminant level (MCL) is 15 ppb. The stricter EWG health guideline is 0.5 ppb. Health effects include irreversible neurodevelopmental damage in children, including reduced iq, learning disabilities, and behavioral problems and cardiovascular effects in adults, including increased blood pressure and hypertension. The most effective removal methods are Reverse Osmosis, Activated Carbon (Block), KDF (Kinetic Degradation Fluxion).

Last updated: 2026-05-16 · Source: EPA, WHO, EWG

Regulatory Limits

EPA MCL

15 ppb

Action level, not a true MCL. EPA's goal (MCLG) is zero.

EWG Guideline

0.5 ppb

Based on California's public health goal for cancer risk.

MCLG (Goal)

0 ppb

The level at which no known health effects occur

Health Effects

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Irreversible neurodevelopmental damage in children, including reduced IQ, learning disabilities, and behavioral problems

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Cardiovascular effects in adults, including increased blood pressure and hypertension

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Kidney damage and reduced kidney function with chronic exposure

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Reproductive harm including reduced fertility and adverse pregnancy outcomes

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There is no safe level of lead exposure — the EPA's maximum contaminant level goal (MCLG) is zero

Especially vulnerable: Infants and children under 6, Pregnant women, Immunocompromised individuals

How to Remove Lead from Water

Technology	Effectiveness	Notes
Reverse Osmosis	high	Removes 95-99% of lead. Most comprehensive solution for drinking water.
Activated Carbon (Block)	high	NSF 53-certified carbon blocks remove 99%+ of lead. Must be block, not granular.
KDF (Kinetic Degradation Fluxion)	high	Copper-zinc alloy effectively reduces lead through electrochemical reaction.
Distillation	high	Removes virtually all lead. Slow and energy-intensive for daily use.
Ion Exchange	moderate	Some ion exchange systems reduce lead, but not all are certified for it.
Granular Activated Carbon	low	Standard GAC (like basic Brita pitchers) has limited lead removal. Look for NSF 53 certification.

Where Lead Is Most Common

Cities with pre-1986 plumbing infrastructure (most older US cities)

Chicago, IL — nearly all 400,000+ service lines contain lead

Flint, MI — ongoing remediation from 2014 lead crisis

Newark, NJ — lead service line replacement program ongoing

Washington, DC — historic lead crisis (2001-2004) from chloramine switch

Milwaukee, WI — significant lead lateral pipe infrastructure

St. Louis, MO — lead mining legacy and aging infrastructure

Pittsburgh, PA — lead service lines in older neighborhoods

Common sources include: Lead service lines connecting water mains to homes (estimated 6-10 million in the US), Lead solder used in copper pipe joints in homes built before 1986, Brass faucets and fixtures containing lead, Lead gooseneck connectors in older municipal systems, Corrosion of lead-containing plumbing when water chemistry changes.

Best Filters for Lead Removal

We've tested and compared the top water filters that are NSF-certified to remove Lead. Each recommendation is matched to specific contaminant removal performance, not just marketing claims.

View our top lead filter picks →