How to Remove Lead from Water

A certified lead-reduction filter can reduce lead in water once it is correctly installed and prepared, but the total time to confirm results and replace affected plumbing varies.

Use filtered water or bottled water for drinking and cooking while you investigate the source. A filter reduces exposure at the tap; replacing lead-bearing plumbing addresses the source but may not eliminate every possible source in a building.

Where does lead in drinking water come from?

Lead can enter water as it travels through a lead service line, household plumbing, solder, fittings or some faucets. The service line is the pipe connecting a building to the water main; responsibility for its different sections can vary by location.

Water sitting in contact with lead-bearing materials can pick up lead. Changes in water chemistry or disturbances to plumbing can also affect how much enters the water. A home can have a lead problem even if the water leaving the treatment plant has little or no lead.

Your water supplier may have information about the service line and local sampling. For the broader context, see drinking water quality.

How does the body handle lead?

Lead exposure after swallowing is a separate concern, discussed in how to detox lead from your body; detox drinks do not make contaminated water safe.

How do you reduce lead in drinking water step by step?

Switch to a safer source. Use bottled water or water from a filter certified specifically for lead reduction for drinking, cooking, making ice and preparing infant formula. Continue using that source while you arrange testing and address the cause. Follow any local water advisory, which may give more specific instructions.
Choose a filter with a verified lead-reduction claim. Look for independent certification to NSF/ANSI Standard 53 or 58 that specifically lists lead reduction for the exact filter model and cartridge. A filter certified only for taste or chlorine reduction is not necessarily certified to reduce lead. Pitcher, faucet-mounted and under-sink filters can work if their particular models have the appropriate claim.
Install and maintain the filter as directed. Follow the manufacturer’s instructions for setup, preparation, use and cartridge replacement. Check that the cartridge fits the certified unit, and do not use it beyond its stated service life. A poorly fitted, bypassed or overdue filter may not provide the expected reduction.
Use cold tap water before filtering. Draw cold water for drinking and cooking, then filter it or heat it if needed. Hot tap water can pick up more lead from plumbing. Boiling does not remove lead and can increase its concentration as water evaporates. If a boil-water advisory is also in effect, follow local instructions; a lead-reduction filter alone may not make water safe from germs.
Ask your water supplier about flushing. Running cold water after it has stood in the pipes can reduce lead in some circumstances, but the appropriate approach depends on the plumbing and service line. Flushing alone is not a guarantee that water is safe; use the certified filter or bottled water, especially while a lead source is suspected. Ask the supplier for instructions suited to your property.
Identify the source. Ask the water supplier about its service-line inventory and whether the line serving your property is known to contain lead. A qualified plumber can also inspect accessible plumbing and fixtures. If you rent, ask your landlord about the building’s plumbing and any planned investigation. A newer faucet or recent renovation does not establish that the entire water pathway is lead-free.
Arrange complete replacement where needed. Contact your water supplier and a qualified plumber about replacing a lead service line or other lead-bearing components. Ask who is responsible for each section and how the work will be coordinated. Disturbing a lead line can temporarily release particles, so follow the supplier’s instructions for using a filter, flushing and testing after the work.
Test the water to check the result. Use a qualified laboratory and follow its sampling instructions. Testing can help identify an ongoing problem and check conditions after repairs, but a single result is only a snapshot. Keep using the recommended filter or alternate source until you have discussed the result and next steps with your supplier or local health department.

Can foods or binders remove lead from water?

Do not add foods, supplements, charcoal products or other purported binders to drinking water to make it safe. There is no reliable evidence that adding them makes lead-contaminated water safe to drink. An ordinary activated-carbon product should not be assumed to remove lead unless the specific filter is certified for that purpose.

Eating a balanced diet matters for general health, but food does not remove lead from a glass of water or replace exposure control. Medical treatment for lead exposure is a separate matter and should be decided by a clinician, not by starting a supplement or binder at home.

How do you test water for lead?

Contact your water supplier or local health department for a laboratory that can test drinking water for lead. Ask the laboratory for containers and instructions before collecting a sample. It may request water from a specific tap after a specified period without use, or samples taken before and after flushing; following its method matters when interpreting the results.

Tell the laboratory or supplier if you want to investigate a particular tap, a service line or the performance of a filter. Sampling before and after a filter may help assess that setup, but the results apply to the samples and conditions tested. Lead levels can vary over time, so discuss whether follow-up sampling is appropriate.

U.S. EPA benchmark	Value	What it means
Health goal for lead	0 mg/L	The goal is zero; it is not a promise that every tap has zero lead.
Lead action level	0.015 mg/L, or 15 ppb	A system-level trigger for required actions, not a safety threshold for an individual tap.
Updated action level	0.010 mg/L, or 10 ppb	EPA’s 2024 rule lowers the action level, with compliance from 2037.

An individual result below an action level does not establish that lead exposure is risk-free. Ask your supplier or health department to help interpret your result and recommend actions for your household.

EPA’s secondary guideline for pH is 6.5–8.5 pH units. If you are working with a pH reading, use the water ph calculator; a pH reading cannot tell you whether lead is present or whether a filter is working.

When should you see a doctor?

Contact a clinician if you or a family member may have consumed water containing lead, especially if the exposed person is a child or is pregnant. A clinician can assess the situation and decide whether a blood lead test is appropriate. Many people with lead exposure have no obvious symptoms, so do not wait for symptoms before asking for advice.

Seek urgent medical help for serious symptoms such as seizures, severe confusion or marked drowsiness. Stop using suspect tap water for drinking, cooking, making ice and preparing formula; use bottled water or appropriately filtered water while you contact your water supplier or health department. If a filter is damaged, overdue for replacement or cannot be verified as lead-certified, stop relying on it and use bottled water.