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HearthDry
Research · Updated 2026-08-22

U.S. Water Damage Statistics

The latest data on water damage claims, costs, causes, and flood risk — sourced from Triple-I, FEMA, EPA, and IICRC standards. Cite freely with attribution.

27.6%

Home insurance claims from water damage & freezing

Share of all U.S. homeowners losses, 2022 (Triple-I, from ISO/Verisk). Second only to wind and hail at 40.7%.

1 in 60

Insured homeowners filing water/freeze claims annually

1.61 claims per 100 house years, 2018–2022 (Triple-I, from ISO/Verisk)

$13,954

Average water damage insurance claim

Average claim severity, water damage and freezing, 2018–2022 (Triple-I, from ISO/Verisk). See the correction note below — the widely republished “$15,400” figure does not appear in Triple-I data.

$25,000

Damage from 1 inch of floodwater in a home

FEMA / NFIP estimate for typical single-family home

$180B+

Annual U.S. flood damage costs

National aggregate (FEMA)

10,000 gal

Household water wasted by leaks annually

EPA WaterSense — average U.S. home

24–48 hrs

Mold colonization window after water damage

FEMA; IICRC S500 drying urgency standard

90%

Natural disasters involving flooding

NFIP — share of U.S. natural disasters with flood component

Water Damage Claim Trends (2019–2023)

YearShare of Homeowners Losses
201824%
201929%
202019.6%
202123.4%
202227.6%

Source: Insurance Information Institute (Triple-I), water damage and freezing share of homeowners losses by year.

Average Claim Severity

Triple-I reports this as a rolling five-year average, not an annual figure.

Five-Year WindowAverage Claim
2016–2020$11,650
2017–2021$12,514
2018–2022$13,954

Source: Insurance Information Institute (Triple-I), from ISO (a Verisk business). 2018–2022 is the most recent window Triple-I has published.

National Restoration Cost Benchmarks

National average restoration project

$1,384–$6,384(avg $3,867)

Clean water (Category 1) per sq ft

$3.75–$4.25/sq ft

Gray water (Category 2) per sq ft

$4.1–$6.5/sq ft

Black water (Category 3) per sq ft

$7–$7.5/sq ft

Class 1 (partial room)

$150–$400

Class 2 (entire room, walls ≤12 in)

$500–$1,000

Class 3 (ceilings, walls, floors)

$1,000–$3,000

Class 4 (major structural / flood)

$20,000–$100,000

Use our free cost calculator for a personalized estimate by water category, square footage, and state.

Top Causes of Water Damage

Plumbing leaks & burst pipes29%
Appliance failures (water heater, washer, dishwasher)21%
Weather / storm-related (non-flood)18%
Roof leaks14%
HVAC / AC condensate8%
Sewer backup6%
Other4%

Expert Perspectives

“FEMA's estimate reflects the widespread damaging impacts that water can have on flooring, walls, insulation, furniture, and personal belongings. Water can damage drywall, warp floors, ruin electronics, and promote mold growth.”

— Michael Loik, Ph.D., Professor of Environmental Studies, UC Santa Cruz

“Most homes have at least some degree of flood risk, regardless of their location. FEMA says even with low or moderate flood risk, your home is still five times more likely to flood than experience a fire over the next 30 years.”

— Courtney Klosterman, Home Insights Expert, Hippo Insurance

“Clean water has a low to minimal contamination level. Gray water carries mild to moderate health risks. Black water has a high contamination level and carries severe health risks.”

— Juneseok Lee, Ph.D., Professor, Manhattan University

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<a href="https://hearthdry.com/research/water-damage-statistics">U.S. Water Damage Statistics 2026 — HearthDry</a>

Data licensed under CC BY 4.0. Primary sources linked below.

Corrections & Disputed Figures

Statistics we checked against the primary source and could not confirm — including one we had published ourselves.

Unverifiable

Claim: “Average U.S. water damage insurance claim is $15,400 (2019–2023, Insurance Information Institute)”

This figure is widely republished and attributed to the Insurance Information Institute, but it does not appear in Triple-I's published data. Triple-I's table is “Average Homeowners Losses, 2018-2022” (source: ISO, a Verisk business), and its table archive contains no 2019-2023 edition. The water damage and freezing row reads $13,954.

Verified figure: $13,954 average claim severity, 1.61 claims per 100 house years, 2018–2022.

Trend: 2016–2020 $11,650 → 2017–2021 $12,514 → 2018–2022 $13,954.

Possible origin: The same Triple-I table lists “All property damage” at $15,570 average — one row below the water damage line. A misread of that row is a plausible origin, though we cannot confirm it.

How we checked: Retrieved the raw HTML of the Triple-I homeowners facts page and searched it directly; “15,400” returns no match, “13,954” does. Cross-checked against Triple-I's table archive listing every historical edition.

Check the primary source yourself

Primary Sources

Methodology: How HearthDry sources and updates data

Water Damage Statistics FAQ

How common is water damage for U.S. homeowners?
According to Triple-I data drawn from ISO/Verisk (2018–2022), about 1 in every 60 insured homes files a water damage or freezing claim each year — 1.61 claims per 100 house years. Water damage and freezing accounted for 27.6% of all homeowners losses in 2022, second only to wind and hail at 40.7%.
What is the average cost of a water damage insurance claim?
The average water damage and freezing claim paid by insurers was $13,954 over the 2018–2022 period (Triple-I, from ISO/Verisk) — the most recent figure Triple-I has published. Out-of-pocket restoration costs for uninsured or partially covered events typically range from $1,384 to $6,384 nationally, with an average around $3,867.
How much damage can 1 inch of water cause?
FEMA and the NFIP estimate that just 1 inch of water in a typical home can cause up to $25,000 in damage to flooring, drywall, insulation, furniture, and personal belongings.
How fast does mold grow after water damage?
FEMA and IICRC S500 standards indicate mold spores can begin germinating within 24–48 hours under warm, humid conditions. Professional structural drying should begin within the first 24 hours to prevent mold colonization.
Does homeowners insurance cover all water damage?
Standard homeowners insurance typically covers sudden and accidental internal water damage (burst pipes, appliance failures) but excludes gradual leaks, poor maintenance, and flooding from external sources. Flood damage requires separate NFIP or private flood insurance.

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