Basement Waterproofing Contractors in Gloucester County, NJ
In Gloucester County, the state's radon data and the townships' own soil surveys tell a consistent story: much of the county's ground holds water and soil gas close to the basement floor.
Woolwich, Swedesboro and the other Tier 1 towns
NJDEP's 2015 report counted 258 of 700 tested Woolwich homes, about 37%, at or above 4 pCi/L. Swedesboro had about 28% of 654 and East Greenwich about 25% of 790, and Deptford, Harrison, South Harrison and Wenonah were Tier 1 as well.
Soils that stay wet
South Harrison's 2008 inventory found more than two-thirds of the township's soils hydric. Mantua's 2005 inventory maps about 6.5% of the township, 664 acres, in the 100-year floodplain along Mantua Creek, Chestnut Branch and Edwards Run.
Washington Township's 2017 inventory is the drier exception, at 7.01% hydric soils, most of the township lying on the Cohansey and Kirkwood formations.
Gloucester County's newer homes
DVRPC's housing profile (ACS 2022) says more than half of Gloucester County's housing went up after 1980. For a newer poured basement on a wet Gloucester County lot, ask first about drainage and pump capacity.
Recent storms
The September 2021 storm spawned an EF-3 tornado in Mullica Hill. In 2026, Gloucester County ranked among the top 25 U.S. counties for flash flood warnings, and a September 1 storm in Mantua affected about 25 roads and flooded at least one resident's basement.
Gloucester County basement questions
Who calls me back about a Gloucester County request?
One participating contractor, the one that covers your Gloucester County ZIP code, usually within a business day.
What if there's no contractor for my Gloucester County ZIP code?
We tell you by email, keep the request on file without sharing it, and let you know when a participating Gloucester County contractor is available.
Which Gloucester County town had the highest radon share?
Woolwich and Wenonah were both about 37% in NJDEP's 2015 report, the highest of the Gloucester County towns we list.
Are South Harrison's soils especially wet?
Yes. Its 2008 environmental inventory classed more than 68% of the township's soils as hydric.
Waterproofing work in Gloucester County
Neighboring counties
Planning a waterproofing job in Gloucester County?
Your Gloucester County ZIP code decides which single participating contractor receives the request. Their estimate is yours to accept or decline.
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