Water Monitoring

Monitoring for Lead

New York City water is virtually lead-free when it is delivered from the City’s upstate reservoir system, but water can absorb lead from solder, fixtures, and pipes found in the plumbing of some buildings or homes. It is possible that this can increase your potential for exposure. For answers to commonly asked questions, visit Lead in Household Plumbing FAQs.

For information about lead testing results in New York City Public Schools, please visit the NYC Deparment of Education website. For general water monitoring information, visit Drinking Water Monitoring.

Lead in Drinking Water

We have detected lead in the drinking water at some homes that have either:

  • lead service lines (homes built before 1961 may have lead service lines)
  • internal fixtures and plumbing that contain lead
  • internal plumbing joined by lead solder (plumbing installed before 1987 may contain lead solder)

Download Lead-Free NYC: Get the Facts on Tap Water for more information.

Sources of Lead

Lead is a common metal found in the environment. It was historically used in paint, plumbing pipes and faucets, and other products. Lead can be found in household dust and soil, as well as and some imported consumer products like clay pottery, cosmetics, food and toys. Lead is rarely found in rivers and lakes. Tests show the water from New York City’s upstate reservoirs and the water distribution system is virtually lead-free.

Lead can be found in the service lines (pipes) that connect buildings to the City’s water mains, in solder on copper pipes, and in faucets.  The presence of lead in New York City drinking water is caused by corrosion, a reaction between the water and the metallic pipes or solder. When water comes in contact with plumbing that contains lead, the lead can be absorbed into the water. Although this can happen at any time, higher concentrations of lead may be found when the water has not be used for several hours, such as first thing in the morning, or late in the afternoon after getting home from work or school. You can minimize the potential for lead exposure by running your tap for 30 seconds or until the water gets noticeably colder before using water for drinking or cooking.

Although regulations have been put in place to reduce the lead in plumbing, your residence may still contain pipes, solder and fixtures that contain some lead if the were installed before these rules came into effect. Even new faucets, fittings, and valves, including those advertised as “lead-free,” may contribute lead to drinking water. Under current federal law “lead-free” plumbing components can still have up to 0.25% lead in the surface touching the water.  Prior to 2014, “lead free” fixtures could have up to 8% lead. Consumers should be aware of this when choosing fixtures and take appropriate precautions.

How the is City Reducing the Risks of Lead in Drinking Water

Before your drinking water goes into the City’s distribution system, we carefully adjust the pH levels of the water to a specific range to lessen the corrosive nature of the water. We also add phosphoric acid—a common food preservative—that forms a protective film on household plumbing as the water passes through your pipes. These steps minimize the amount of lead that dissolves into water, especially in private homes with lead pipes, fixtures or solder.

We also perform water quality monitoring throughout the City every day to make sure we continue to deliver the healthy, great tasting water that New Yorkers expect. We monitor New York City’s drinking water for approximately 250 contaminants, approximately 100 of which are not currently required by regulations, and conduct more than 600,000 water quality tests each year.

Additional Lead in Drinking Water Resources

Useful Phone Numbers

  • Dial 311 or fill in this online form to order a free lead in drinking water test kit
  • Call the EPA National Lead Information hotline at 1-800-424-LEAD
  • Call the EPA Safe Drinking Water Hotline at 1-800-426-4791

Tips to Reduce Your Exposure to Lead in Drinking Water

Graphic showing how to take apart a faucet head

Run Your Tap Until it’s Cold

Run your tap for at least 30 seconds, until the water is noticeably colder, before using it for drinking, cooking or making baby formula any time the water in a faucet has stood for several hours.

Use Cold Tap Water for Drinking, Cooking and Making Baby Formula

Never use hot tap water for drinking, cooking or making baby formula and baby cereal. Lead can dissolve more easily in hot tap water.

Clean Your Faucet Screens

Sometimes lead and sediment can build up on the individual screens at your faucets. To clean them, periodically take off the faucet strainers from all taps and run the water for 3 to 5 minutes.

Lead in Drinking Water Test Kit

To request a free lead test kit, call 311 or fill in this online form. If you have already received your test kit in the mail, go to Lead in Drinking Water Test Kit for step-by-step sampling instructions (available in multiple languages) and an instructional how-to video.

NYS Lead Service Line Replacement Program

Under this program, New York State is providing funds to the City to work with low-income homeowners to replace privately-owned lead service lines at no cost to the homeowner. Eligible New Yorkers will receive an information packet and application in the mail.

Homeowners are eligible for this program if:

If you already received an application in the mail, you can fill out and submit the Lead Service Line Replacement Program Application online.

If you have already had your service line replaced, download the Water Service Line Replacement at Your Home: Flushing Directions to to minimize your risk of lead exposure through your plumbing.

For more information about lead exposure and prevention in New York City, visit nyc.gov/leadfreenyc.

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