Does my city's water contain lead?

Utility-level testing may show low or no lead at the treatment plant, but lead can still leach into your water from your home's plumbing or the service line connecting your home to the street. The only way to know your personal exposure is to test your tap water directly.

What removes lead from tap water?

Reverse osmosis (RO) systems and NSF/ANSI 53-certified activated carbon filters are both effective at removing lead. Look specifically for the NSF/ANSI 53 certification for lead reduction — not all carbon filters are certified for lead. Simple pitcher filters must be certified for lead specifically.

How do I reduce lead exposure while waiting for a filter?

Flush your tap for 30–60 seconds before using water for drinking or cooking, especially after water has sat overnight. Use cold water only (hot water leaches more lead). This doesn't eliminate lead but reduces your exposure.

Does my home have a lead service line?

Homes built before 1986 are most likely to have lead service lines or lead solder. Many utilities now offer lead service line replacement programs. Contact your water utility to request a service line material record or schedule an inspection.

Is lead in well water a concern?

Lead is rarely found in groundwater naturally. Well water lead exposure almost always comes from lead in the well pump, pressure tank, or household plumbing — not the aquifer. Testing your well water is still recommended if you have older plumbing.

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high risk levelHeavy Metals

Lead in Drinking Water

Lead enters drinking water primarily through corrosion of lead service lines and lead-containing plumbing fixtures — not typically from the water source itself. There is no safe level of lead exposure for children. The EPA is revising its Lead and Copper Rule to eliminate lead service lines nationwide by 2037.

Quick Answer

Lead is a naturally occurring heavy metal that was widely used in plumbing infrastructure until it was banned for new installations in 1986. An estimated 9.2 million lead service lines still connect homes to public water mains across the United States, along with millions of homes with lead solder in their internal plumbing.

Why Do People Care?

Lead exposure causes irreversible neurological damage in children, with no threshold below which effects are absent. The Flint, Michigan crisis (2014–2019) demonstrated how quickly lead contamination can escalate when corrosion control is inadequate.

Children under 6 and pregnant women face the greatest risk. Homes built before 1986 are most likely to have lead plumbing. Renters and low-income households in older urban housing stock face disproportionate exposure.

Known Health Effects

Permanent cognitive and behavioral impairment in children

Reduced IQ and learning disabilities

Hyperactivity and attention problems

Slowed growth and developmental delays

High blood pressure and kidney disease in adults

Miscarriage and premature birth risk during pregnancy

Common Sources

Lead service lines connecting street main to the home

Lead solder in household plumbing (pre-1986 construction)

Brass faucets and fixtures with lead content

Lead-lined storage tanks in older buildings

Corrosive water chemistry that dissolves lead from pipes

Regulatory Limit

EPA Maximum Contaminant Level (MCL)

15 ppb (action level)

The EPA's Lead and Copper Rule sets an Action Level of 15 parts per billion (ppb) — if more than 10% of tap samples exceed this, utilities must take corrective action. The Maximum Contaminant Level Goal (MCLG) is zero, meaning no level of lead is considered safe. The 2024 Lead and Copper Rule Improvements require utilities to replace all lead service lines within 10 years.

How to Test for It

Lead testing requires a 'first draw' sample — water that has sat in pipes for at least 6 hours. Testing kits are available from certified labs. Many utilities offer free testing for residents. Because lead contamination is highly localized (it depends on your specific pipes, not just the source water), individual testing is more meaningful than utility-wide results.

Effective Treatment Options

These treatment methods have demonstrated effectiveness for Lead.

Reverse Osmosis

Reverse osmosis (RO) is the most comprehensive point-of-use water treatment technology available for residential use. It removes 90–99% of dissolved contaminants including PFAS, lead, arsenic, nitrates, and disinfection byproducts by forcing water through a semi-permeable membrane with pores of approximately 0.0001 microns.

PFAS / PFOA / PFOS — 90–99% removalLead — 95–99% removal

Activated Carbon

Activated carbon is the most widely used residential water treatment technology. It removes chlorine, taste and odor compounds, disinfection byproducts, many volatile organic compounds (VOCs), and — with NSF/ANSI 53 certification — lead and some PFAS. It is available as pitcher filters, under-sink units, and whole-house systems.

Chlorine and chloramine — virtually complete removalTaste and odor compounds — highly effective

Frequently Asked Questions

Reverse Osmosis Filtration

Removes: Lead

Activated Carbon Filtration

Removes: Lead

Arsenic in Drinking Water

Heavy Metals

Data Sources & Provenance

All data on this page is sourced from official U.S. government or public datasets.

EPA Drinking Water Contaminant InformationView source

ATSDR ToxFAQs / Toxicological ProfilesView source

EPA SDWIS — violation and detection dataView source

Last updated: 2025-01-15

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