Houston, TX
Houston water service lines: the inventory and 'unknown material' letters
Updated · Editorial team; not yet technically reviewed
Short answer
Houston Public Works hasn't found any lead pipes in its service lines, but most of the city's roughly 534,000 lines were listed as 'unknown material' on the public or private side, so about 430,000 customers received notices. The inventory map lets you look up your address, and the line from the meter to your house is yours to repair if it leaks.
What's different in Houston
Houston Public Works has not found any lead pipes in its service lines; of 534,165 service lines, 447,955 had unknown material on the private or public side, and 86,210 had identified materials. [1]
HPW sent notices to 429,662 customers whose service line material is unknown, by November 15, 2024. [1]
A public service line inventory map lets residents search their address to see the recorded material, and the city is planning replacement of any lead or galvanized-requiring-replacement lines found. [1]
Got an 'unknown material' letter?
Don't panic
Unknown means unrecorded, not lead; no lead lines had been found.
Look at your pipe
Check where the line enters or rises near the house; see how to identify lead pipes.
Report what you find
Use the city's inventory tools to update your record.
Houston service line leaks
Shifting clay soil and slab construction make buried line leaks common. A meter test tells you whether water is escaping past the meter; then leak detection pinpoints it. Repair quickly: Houston's leak adjustment credit shrinks after 30 days (see Houston high water bills).
What Houston homeowners usually check next
- SymptomSigns of a hidden leak
- SymptomWater bill suddenly high
- SymptomNo water in the house
Common questions
Does Houston have lead water service lines?
Houston Public Works hasn't found any, but many lines are still listed as unknown material.
Why did I get a Houston 'unknown material' notice?
Your service line material isn't recorded on the public or private side; about 430,000 customers got one.
How many Houston service lines are unknown?
447,955 of 534,165 at the time of the announcement.
Is Houston's service line map public?
Yes, anyone can search an address on Houston Public Works' inventory map.
Will Houston replace galvanized lines?
The city is planning replacement of lead or galvanized-requiring-replacement lines if any are found.
What does an unknown service line mean for my water?
Only that the material isn't recorded; you can check the pipe yourself or ask a plumber.
When were Houston service line notices sent?
By November 15, 2024.
Why do Houston water lines leak underground?
Clay soil shrinks and swells, stressing buried lines.
Who repairs a leak between my Houston meter and house?
Generally the property owner; the private side runs from the meter to the house.
What yard signs point to a Houston service line leak?
A soggy strip between the meter and house in dry weather, or new low spots along the line.
More plumbing help in Houston
- Water Heater Replacement in HoustonReplacing a water heater in Houston: the required plumbing permit, the registered master plumber rule, permit fees, inspection.
- Drain backing up in HoustonWhy Houston drains back up: grease and wipes cause 70% of the city's sewer overflows, and overflows double when it turns cold. Symptoms, safe checks and fixes.
- Water bill suddenly high in HoustonHouston's leak adjustment: credits for leaks from freezes, corrosion or wear, 100% to 50% by repair speed, and the paperwork needed.
- Backflow Testing in HoustonHouston backflow testing: testing companies must register with the city, testers need TCEQ licenses, and gauges need annual calibration reports filed with Houston.
- Sewer Line Replacement in HoustonReplacing a sewer line in Houston: a registered master plumber must pull the permit, how the homestead permit differs, minimum fees and inspections.
- Frozen Pipe Repair in HoustonFrozen pipes in Houston: Houston Public Works' prep tips, why it has advised against dripping faucets (pumps, not towers), and shutting off and draining instead.
- Water Line Repair: the full guideSigns the water service line from the meter to your house is leaking, who owns it, repair vs. replacement, lead lines, and trenchless options.
- Plumbing in HoustonLocal water, housing and climate conditions, and the calls Houston homes need most.
How other cities handle it
- Lead service line replacement in ChicagoHow lead water service line replacement works in Chicago: free and fee-waived city programs, who qualifies, what state law requires, and what the job involves.
- Lead service line replacement in DetroitHow Detroit and Michigan law handle lead water service line replacement: who pays, full-line requirements, timelines, and what homeowners should do meanwhile.
- Lead service line replacement in DenverHow Denver Water replaces customer-owned lead service lines with copper at no direct cost, which homes are most likely affected, and what to do while you wait.
- Lead service line replacement in MilwaukeeHow Milwaukee's lead service line rules work: when full replacement is required, what homeowners pay, how to look up your address, and what to do while you wait.
- Lead service line replacement in CincinnatiHow Greater Cincinnati Water Works replaces private lead service lines: who pays, who gets priority, how long the program runs, and how to get started.
- Lead service line replacement in PittsburghPittsburgh Water lead line programs: neighborhood replacements, free income-qualified replacement, plumber reimbursement, and how to apply.
- Lead service line replacement in BostonHow Boston Water and Sewer Commission's free lead service replacement works: free inspection, free replacement, how to check your address, and what to expect.
- Lead service line replacement in ClevelandWhen Cleveland Water replaces your side of a lead line for free, how galvanized pipe is handled, yearly targets, and what to do next.
- Lead service line replacement in St. LouisSt. Louis lead service lines: the city's inventory, why rates can't pay for the private side, grant and loan help, and what owners can do now.
- Lead service line replacement in PhiladelphiaPhiladelphia lead service lines: owner responsibility, free replacement during main work, the free ZIP-code pilot, and 0% HELP loans.
- Water and sewer service line repair in New York CityNYC owners own their water and sewer service lines: DEP 3-day and 30-day notices, the licensed master plumber rule, permits and the $1,000 shutoff fee.
- Water and sewer line repair in New OrleansWho pays for water and sewer service connections in New Orleans: Sewerage and Water Board rules, owner responsibility on post-1954 lots, and Board-caused damage.
- Water service line repair in Kansas CityKC Water service line rules: the City maintains mains to the curb box, owners repair from the curb stop to the house under Ordinance 78-22, and warranty options.
- Lead water service line replacement in Washington, DCLead service lines in Washington, DC: who pays for each side, Block-by-Block replacement of the private side at no cost, and what to do before your block comes up.
- Lead service line replacement in ProvidenceLead service lines in Providence: Providence Water's free private-side replacement for eligible customers, 10-year 0% loans, and the free public-side match.
- Lead service line replacement in Des MoinesLead service lines in Des Moines: Des Moines Water Works' free replacement funded by a $52.6M state loan, the Drake first phase, and how to check your line.
- Water line leaks in Phoenix: the meter decides who paysWater line leaks in Phoenix: the city repairs the street side of the meter, the owner the rest, and city code makes customers pay for water lost past the meter.
- Water and sewer service lines in CharlotteCharlotte water and sewer service lines: Charlotte Water handles mains to the curb, owners handle the laterals from curb to home, and what that means for leaks.
- Water line leaks in AustinWater line leaks in Austin: Austin Water owns the line to the meter box near the sidewalk, owners own everything past it.
- Water service line leaks in BuffaloBuffalo water service lines: the line from the city main to the house is private, the owner keeps up the curb box and valve, and what Buffalo Water will do for free.
- Lead service lines in Newark after the replacement programNewark replaced its 18,720-plus lead service lines at no cost to residents, funded by city and Essex County bonds. What's left to check in an older Newark home.
- Lead service line replacement in Jersey CityJersey City's Lead Free JC: about 16,000 lead lines to replace by June 2031 at no direct cost, JCMUA contractors or your own with a credit, and the inventory lookup.
- Water service line repair in SeattleSeattle water lines: owners install and maintain the private line from the city union to the house, and how SPU's leak adjustments treat city-side and.
- Water service lines in Fort WorthFort Worth service lines: the city owns the line to and including the meter, owners own the rest, the lead inventory shows no lead lines.
- Dallas water service lines and the service line inventoryDallas Water Utilities' service line inventory: how materials were identified, letters to 225,000 unknown lines, and the GIS lookup.
- Water service lines in Los Angeles: no lead foundLADWP's service line inventory found no lead or galvanized-requiring-replacement lines, including customer-owned ones. What that means for LA water line repairs.
- Water service lines in San Antonio: SAWS inventory and free inspectionsSAWS's service line inventory: over half of 600,000 lines unidentified, yearly letters to unknown, lead or galvanized lines, and free inspections for pre-1989 homes.
Sources (1)
- Houston Public Works, City announces plan to identify possible lead pipes · checked 2026-10-03