Over 44% of the homes here predate 1940
The Census figures for Lawrence are blunt. Of 31,845 housing units, 44.4% were built in 1939 or earlier, and the citywide median build year is 1950. That means a lot of original pipe is still inside walls, under slabs and in the street connection.
Age shows up as galvanized steel choked with rust, cast iron drains that have flaked inside, and lead or unknown-material water services. When one of those fails at night, it is an emergency, and our 24/7 line is built for it.
| ZIP | Share built 1939 or earlier | Median year built | What it means for a call |
|---|---|---|---|
| 01841 | 48.9% | 1943 | Expect old drains, galvanized lines and mixed repairs from decades of owners |
| 01843 | 41.2% | 1954 | Older stock alongside postwar houses, so the pipe material varies house to house |
| 01840 | 32.7% | 1955 | Fewer pre-1940 homes, but the City Hall ZIP still has older housing |
Only 28.1% of Lawrence homes are owner-occupied, so many households here are tenants. If you rent, tell your landlord the minute you find a leak. Call us if you cannot reach them and water is still running.
Lead, unknown and copper: where Lawrence service lines stand
Lawrence draws from the Merrimack River and treats it at its own plant on Water Street. The Water & Sewer Department reports 12,777 service lines in the city. Since 2017 it has replaced 126 lead lines, records show about 57 possibly still in place, and 345 are of unknown material.
Those two leftover groups matter to you. In the 2026 report, the 30 homes sampled came in at 0.000 mg/L at the 90th percentile, but the pipe in your own yard is a separate question.
You own the pipe from the street main through the meter
The City states that the service runs from the main up to and including your meter and that the owner pays to maintain it. Since January 2014 new lead cannot go into a service, so lead services are not repaired. The City encourages replacing them with copper. Check the City's service line inventory map for your address, then call a licensed plumber for the replacement.
| Inventory result | What to do | Who is involved |
|---|---|---|
| Lead | Plan a copper replacement, do not patch it | Licensed plumber with the Water & Sewer Department |
| Unknown material | Have it identified by exposing the line at the meter or entry | Plumber, then the City records |
| Copper | Watch for leaks if the water bill climbs | Plumber for leak location |
A full water service failure is a street-to-house job, so see our page on water line repair for how the work goes. For houses with old galvanized plumbing inside, a repipe ends the cycle of patch after patch.
Water pouring in a Lawrence basement right now?
Call (603) 815-9179 and we will dispatch a licensed plumber from Methuen.
Combined sewers, the Spicket, and basements that fill in a storm
Lawrence runs about 137 miles of sanitary and combined sewers. Roughly 30% of the system has been separated, so combined pipes still carry both storm runoff and household waste through the older parts of the city. The Greater Lawrence Sanitary District permit lists 6 combined sewer overflow outfalls, and the same district treats the flow in North Andover.
In a hard rain, that shared pipe can fill faster than it drains. Water then looks for the lowest opening, which is your basement floor drain. A backwater valve on the building drain and a working sump pump are the practical defenses.
The Arlington lesson
Arlington sits beside the Spicket River, and it has flooded. In 2003 FEMA, with HUD funds, paid to relocate 22 owners and tenants there, which it called the largest such acquisition in New England. If your basement stays damp near the river, a sump pump check before storm season costs far less than a flooded finish.
Report a sewer overflow to the City at 978-620-3580, then call us if sewage is inside your house.
When a sewer line itself has collapsed or cracked, the fix is excavation or lining, and our page on sewer line repair explains how that decision gets made. Crews that cover Lawrence also take calls from North Andover on its east side and Andover to the south, all through the same dispatch.
Cold snaps, meters and frozen pipes
The state building code table uses a 48 inch frost depth, and the City itself warns that pipes and meters freeze in attics, basements, crawl spaces, garages and exterior walls. It suggests keeping the thermostat at 55 F or higher and finding your master shutoff before you need it.
Because the service through the meter is yours, a frozen meter or split pipe is your repair. If a pipe bursts in the middle of the night, we treat it as an emergency call, and our page on burst pipe repair covers what we do on site.
Before the first hard freeze
- Find the main shutoff and turn it once to make sure it moves
- Insulate pipes in garages, crawl spaces and exterior walls
- Open cabinet doors under sinks on exterior walls in a cold snap
- Keep the thermostat at 55 F or higher if the house is empty
Gas appliances in South Lawrence and everywhere else
After the September 13, 2018 over-pressurization of the Columbia Gas system, which hit Lawrence, Andover and North Andover, gas piping and appliance hookups in many homes were disconnected, abandoned or relit. Eversource now operates the gas system.
A licensed plumber and gas fitter should confirm that your water heater has a correct vent, a shutoff and a sound connection. If you smell gas, leave the house and call Eversource or 911 first. Do not call a plumber first.
Permits and inspections in Lawrence
Lawrence Inspectional Services sits at 200 Common Street, and permits are filed through the City's online permit portal. We do not guess at permit rules the City has not published, so ask us and we will confirm the process for your job when you call. Massachusetts requires emergency work to be inspected by the next working day.
A burst pipe or active leak in a Lawrence home: do these four things before the plumber arrives. The line to call, day or night, is (603) 815-9179.
Shut off the main
Turn the main valve at the meter or where the service enters the house. If you cannot reach it or it will not turn, call the Water & Sewer Department at 978-620-3110 about the street side.
Kill power near the water
Switch off the breaker for any wet room, basement or kitchen. Do not step into standing water near outlets or a panel.
Clear the area
Move people and pets out of the wet zone. Lift rugs and valuables if you can do it dry and safely.
Call the 24/7 line
Call (603) 815-9179 with your address, the ZIP and what you see, and we will dispatch a licensed plumber.
Lawrence plumbing questions
Yes. Our licensed plumbers answer the 24/7 emergency line for burst pipes, sewer backups and water heater failures in Lawrence, and we dispatch from 251 Broadway in Methuen, just across the river. Same-day appointments when available.
Yes. ZIP 01841 is the largest by population and has the oldest median build year (1943). ZIPs 01840 and 01843 are also Lawrence ZIPs. We take calls in all three.
According to the City, your water service runs from the main in the street up to and including your meter, and the owner is responsible for maintaining it. A licensed plumber handles the repair, coordinated with the Water & Sewer Department.
The City publishes a service line inventory map. Look up your address, and if the material shows as lead or unknown, ask us about exposing the line to confirm it.
No. The City says new lead has been prohibited in a service since January 2014, so lead services are not repaired. It encourages owners to replace them with copper.
Older parts of the sewer system are combined, so storm runoff and waste share the same pipe and can overload it. Floor drains are the lowest opening in many basements. A backwater valve, a clean main drain and a working sump pump all help.
Leave right away and call Eversource or 911 from outside. Do not flip switches or light anything. A plumber and gas fitter can inspect the appliance after the utility has cleared the house.
Yes. Only 28.1% of Lawrence homes are owner-occupied, so many households here are tenants. Tenants should tell the landlord first. If water is still running, call us to stop the damage.
Not sure which pipe it is? Call (603) 815-9179 any hour and describe what you see.

