Radon Mitigation & Testing in Lockport
Platted in 1837 as headquarters of the I&M Canal, Lockport keeps one of the best-preserved limestone downtowns in canal country — surrounded by subdivisions young enough that the town's median home dates to 1998. Two housing stocks, two radon playbooks, one licensed fix.
The canal-town core: stone above, soil gas below
Lockport's historic district — the canal commissioners' town, with landmarks like the 1838 Gaylord Building — is built of the same dolomite limestone the canal crews cut from the Des Plaines valley. Those walls have stood for nearly two centuries; what they were never designed to stop is soil gas. Rubble-jointed limestone foundations, stone-walled cellars, and partial crawl spaces give radon more entry area than any modern foundation, and the fix often pairs a sub-slab suction point with a sealed crawl membrane. Installers who work these houses route pipe to keep street-facing facades clean — the district earned its preservation, and a radon stack shouldn't cost it.
The other Lockport: subdivisions on a 1998 median
Most of today's Lockport isn't historic at all. The city's median home was built in 1998, and ownership runs deep — 84.6% owner-occupied with a median household income around $112,000 and median home values near $316,000. Those 1990s and 2000s two-stories share Shorewood's problem: modern tight construction, full basements, built before the June 2013 radon-resistant construction requirement. They're also the easy install — one suction point, one day, typically $1,200–$1,700 through the city's Building Department permit process.
Don't let the label pick for you
Will County's EPA "Zone 2" tag suggests moderate readings; Illinois state data shows more than 40% of tested homes statewide at or above the 4.0 pCi/L action level, and the statewide average of 5.1 clears the action level on its own. A canal-era cellar and a 2005 basement two miles apart can post nearly identical high numbers off the same glacial soil. An $8 county kit from the Will County Health Department answers the only question that matters: what does your house read?
Stone cellar or new build — Lockport tests the same.
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