Herndon: bought water, town-run pipes

Who does what here

Water	The town buys water from Fairfax Water and maintains the distribution system. The owner is responsible for the water pipe from the meter to the building. source
Sewer	The town maintains the sanitary sewer. From the property line in to the building, the lateral and its repairs and backups fall to the owner. source
Permits	Not confirmed: the town's pages did not name an issuer of Herndon plumbing permits. Ask the town before you hire. source
Licensing	Contractor classes are set by the state board according to job value; the permit office, once found, says what it verifies. source
Lead pipes	The town has a Lead and Copper program page. Its contents were not opened here, so ask public works what it holds for your street. source

Buying water is different from making it

Herndon buys its water rather than making it. Fairfax Water is the seller, and the City of Falls Church also relies on that utility for its mains, but Herndon keeps the pipes under its own streets and answers for them. So a main break or low pressure on a Herndon street is a call to the town, not to the wholesaler. For the same question in a neighbor with a different set-up, compare the Town of Vienna sheet, where the town runs a system of its own.

The two ownership lines

On the water side, the town's page puts the owner's duty from the meter to the building. On the sewer side, the owner's duty starts at the property line, not the main. That matters when a root intrudes in the stretch between the property line and the sewer main: the page as we have it does not say who covers that stretch, so ask. The same page makes the owner responsible for backups and for locating lines before digging. Backups are covered in basement backups.

Lead and copper

The town carries a Lead and Copper program page under public works. Federal rules require water systems to find and replace lead pipes within ten years under the 2024 rule, which is under court challenge. What that means for a Herndon street is a question for the town's utility staff.

The permit gap

This map does not guess across a border. Fairfax County's permit portal handles county properties, and in the Town of Vienna the county is the building official, but we found nothing that says the same for Herndon. Call the town first, and have the answer in writing before the plumber opens a wall.

What the map can't tell you

• Which office issues plumbing permits for a Herndon house. The town's pages did not say.
• Where the town's responsibility for the sewer ends and yours begins.
• Whether your own service line is lead, copper or something else. The town page was not read here.
• Whether the Herndon mailing area matches the town limits. It may not.

Check your own address

1. Find the sewer line on the town's utility map, if it offers one, or ask public works to show where your lateral meets the main.
2. Ask the Town of Herndon who issues your plumbing permit and which inspections follow.
3. Read your latest water bill for the town's name and a meter number.
4. Call 811 at least three days before any digging, and keep trench work with licensed contractors.
5. If you smell gas, leave at once and call 911, then 844-927-4427 from outside.

More on checking an address

Survey notes: sources for this page

• Town of Herndon water and sewer. Known to us only from a search listing of the page; the site would not open for us.
• Town of Herndon lead and copper. Known to us only from a search listing of the page; the site would not open for us.
• EPA lead and copper rule improvements. Opened November 3, 2026.
• Virginia 811. Opened November 3, 2026.
• Washington Gas safety page. Opened November 3, 2026.
• Virginia Code 54.1-1100. Opened November 3, 2026.