Gas Line Repair in Markham, IL
Most of Markham is on the gas main: 96% of households. That means a meter on the wall and a service line under the ground, and a boundary between them that federal rules put in a specific place.
Read this first
A buried service line and a meter sit on most properties in Markham, where 96% of homes are on mains gas. Federal rules end the utility's service line at the meter outlet, so everything downstream of the meter is the owner's to maintain and repair.
Source: US Census Bureau, American Community Survey table B25040; the service line boundary is 49 CFR § 192.3.
If you smell gas right now
Leave the building on foot. Do not use a phone or a light switch inside. Call 911 and your gas utility from somewhere else, and do not call us — we are a referral service, not an emergency line. The full list, in order.
How Markham is supplied
49 CFR § 192.3 fixes the end of the service line at the meter outlet. It is a precise answer to a narrow question, and it is not the same as who is responsible for repairs, which varies by utility and by state.
Establishing which side of the meter a fault is on is the first thing any contractor should do, because it decides whether they are the right person to call.
| Households in Markham | Share |
|---|---|
| Utility (mains) gas | 96% |
| Bottled or tank propane | under 1% |
| Electricity | 3% |
| Fuel oil and kerosene | 0% |
| Wood and everything else | 1% |
Source: US Census Bureau, American Community Survey 5-year estimates, table B25040 (house heating fuel), 2023 release. Universe: 3,655 occupied housing units. This is the heating-fuel table. It does not enumerate service lines, and no table does at this geography; what it gives is the best available indication of which arrangement a property is on. Service line definition: 49 CFR § 192.3, via PHMSA interpretation PI-12-0003.
Across Illinois as a whole, 82% of households are on mains gas and 2% on tank propane. Markham sits 14 points above the state on mains and 1 point below it on propane. A state figure would flatten exactly that difference, which is the reason these pages are built town by town instead.
Before anyone digs on the property
PHMSA describes excavation damage as the leading cause of pipeline incidents, and puts the effect of one free phone call plainly: someone who calls 8-1-1 before they dig has a 99 percent chance of avoiding an incident, injury, harm to the environment and even death.
Source: PHMSA, 811 Day.
What to ask whoever quotes it
Ask them to describe the fault before they price it. "The line needs replacing" is not a diagnosis, and on a buried run the difference between one damaged point and a line at the end of its life is most of the cost.
Other Illinois towns we route in
- Berkeley 97% mains gas · 0% tank propane
- Midlothian 89% mains gas · 2% tank propane
- Davis 72% mains gas · 17% tank propane
- Northbrook 82% mains gas · 1% tank propane
- Justice 86% mains gas · under 1% tank propane
Checking a plumber in Illinois
Illinois licenses are issued by the Illinois Department of Public Health, Plumbing Program, which publishes a public search you can use before work begins.
Gas work is separately permitted and separately licensed in most jurisdictions, so ask specifically about gas rather than plumbing in general.
For repair work, not for a suspected leak.If you can smell gas, leave and call 911 or your utility from outside; this is the wrong number for that. For everything else — a line, a meter, an appliance connection — we will route you to a contractor covering your area, free of charge to you. Other Markham requests are covered by the same line.
Call (888) 752-8038