Nassau County
Mold Removal in Port Washington, NY, From the Harbor Edge to the Hilltop
Tell us how far up the slope your Port Washington house sits and where the damp is showing, and we will say whether the ground or the house is the likelier source before anyone sells you a fix. Inside this one hamlet, USGS wells read the water table 0.37 feet below the surface at a low well near the harbor and roughly 33 to 80 feet down at wells more than 110 feet above sea level.
Request a quote in Port Washington
Tell us the town, the lowest level of the house and where the damp is showing. In Nassau that is usually enough to say whether the water is coming up from the ground or out of the house, and which licensed trade the job needs.
Would you rather talk it through? Call (315) 640-3590.
$100 off your first job
Credited by us on your first booked job.
- One credit per customer per property, on your first booked job.
- Valid through December 31, 2026.
Mention this offer when you book. Full terms.
What USGS wells measured under Port Washington
Five USGS water table wells inside Port Washington read from 0.37 feet to 79.71 feet below the surface in spring 2016: 0.37, 11.38 and 16.11 feet at wells 17 to 44 feet above sea level, and 32.77 to 79.71 feet at wells 110 to 154 feet above sea level.
Source: U.S. Geological Survey, Water Data for the Nation, groundwater field measurements, accessed 2026-09-23
USGS found that September 1996 water table levels on Manhasset Neck ranged from 3 to 120 feet above sea level, with the highest in the central and southern parts of the peninsula, and concluded that in general the water table there tends to parallel the land surface.
Source: U.S. Geological Survey, Water-Resources Investigations Report 00-4193 (Stumm, Lange and Candela, 2002), accessed 2026-09-23
In its annex to the county hazard plan, the Town of North Hempstead reports that only 35 properties in its jurisdiction are located in the flood zone, most of them in Port Washington.
Source: Nassau County Hazard Mitigation Plan 2021, jurisdictional annex for the Town of North Hempstead, accessed 2026-09-23
Census estimates for 2020 to 2024 count 6,486 housing units in Port Washington with 33.4 percent built in 1939 or earlier, a median year built of 1953 and 23.1 percent of occupied homes rented.
Source: US Census Bureau, American Community Survey 2020-2024 5-year estimates, Port Washington CDP, tables B25034, B25035, B25003, B25024 and B25040, accessed 2026-09-23
Is your Port Washington house near the water or up the hill?
Give us a rough idea of where the house sits and where the damp shows. In Port Washington that one detail changes which trade the job starts with.
Harbor level or hilltop: planning a Port Washington job
Port Washington is a hamlet in the Town of North Hempstead, so building questions go to the town, except inside the small incorporated villages on the peninsula, such as Port Washington North and Baxter Estates, which run their own. The ground changes quickly here. USGS found that the water table on Manhasset Neck tends to follow the land surface, which is why the readings climb from under a foot at the lowest wells to tens of feet up the hill. Down near the water, a musty lower level can genuinely be groundwater, and a drainage contractor may be the right first call. Up the slope, the same smell almost always points at the house: a roof, a gutter, a supply line or condensation, and waterproofing bought for it changes nothing. The town's own plan places most of its few flood zone properties in Port Washington, so if yours is one of them, mention it when you write. A third of the homes here predate 1940, and older walls hide old water well.
Mold and water work we arrange in Port Washington
Mold Inspection and Assessment
Find out whether the water behind the mold is coming up from the ground or out of the house itself, and get the scope in writing before anyone quotes for removal.
Mold Inspection in Port Washington →Mold Remediation and Removal
Have the growth taken out by a licensed remediation firm working to the independent assessor's written plan, with the water that fed it repaired first.
Mold Remediation in Port Washington →Water Damage Drying and Restoration
Get the water out and the structure dried before mold starts, including the slab, the flooring and the finished basement walls where water hides.
Water Damage Drying in Port Washington →Describe the Port Washington damp and we will work out its direction
Each request is read by a person, not a script. If what you describe is a small patch you can clean and dry yourself, you will hear that from us plainly.