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Lead service lines in Derry, NH

59 water utilities serve Derry, with approximately 23,537 people served.

Last verified from EPA SDWIS + utility inventories: 2026-04-14
Known lead
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Galvanized
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Lead Service Lines in Derry, NH

Derry's public water system serves approximately 23,537 residents across 59 water systems. Like many older communities in New England, Derry may have lead service lines—the pipes that connect homes to the main water main. These lines can leach lead into drinking water, especially in homes built before the 1980s.

What you should know

Lead service lines were commonly installed in the US before lead was banned from plumbing in 1986. If your home was built before that, there's a meaningful chance your connection uses lead. The good news: lead in water can be managed with simple, inexpensive steps.

The Derry Water Department, which serves about 17,290 residents, is your primary source for information about service lines in your area. They can tell you whether your property has a known lead line, and they're required by law to provide this information.

How to find out if you have a lead service line

Contact the Derry Water Department directly. Ask them:

  • Does my address have a known lead service line?
  • If unknown, what's the age and material of my home's connection?
  • What's your recommended next step for testing or replacement?

You can also request a copy of your property's service line record. Many utilities now maintain inventories and can answer these questions quickly.

If you do have a lead service line

Don't panic. A lead line doesn't automatically mean unsafe water. What matters is whether lead is actually entering your water—and that depends on water chemistry, corrosion control, and your home's plumbing.

Simple steps reduce risk: flush cold water for 30 seconds before drinking or cooking, use cold water for drinking and cooking (hot water leaches more lead), and consider a certified lead-reducing filter if you want extra assurance.

If you're concerned about your family's exposure—especially if you have young children—talk to your pediatrician or check CDC guidance on lead and health.

Next steps for residents

  • Contact the Derry Water Department and ask about your service line material and age.
  • Request a copy of your property's service line inventory record.
  • If your line is lead or unknown, use cold water for drinking and cooking.
  • Have your water tested if you want to know lead levels (contact your utility for a certified lab referral).

Utilities serving Derry

Common questions

How do I know if my house in Derry has a lead service line?

Contact the Derry Water Department directly—they maintain service line records and can tell you the material and age of your connection. You can also request a copy of your property's record in writing.

Is lead in drinking water dangerous?

Lead can be harmful, especially to young children and pregnant people. For health concerns, talk to your pediatrician or check CDC.gov/lead. A water test can tell you if lead is actually in your water.

What should I do if I have a lead service line?

Use cold water for drinking and cooking, flush cold water for 30 seconds before use, and consider a certified lead filter. Talk to your utility about replacement options and any rebate programs.

How much does it cost to replace a lead service line in NH?

Costs vary widely ($1,500–$5,000+) depending on line length and yard conditions. Check with the Derry Water Department about rebates, low-interest loans, or state/federal funding programs.