Water Risk Profile — ZIP 48109
Flood risk, local cost data, climate factors, and insurance context for your ZIP code.
Flood Risk
Medium
Cost Range
$1,500–$8,500
Avg Response
42 min
NFIP
State participates
Local Climate & Risk Factors
Ann Arbor area water damage claims reflect Michigan's lake-effect climate: heavy snowfall that creates roof load and ice dam conditions, spring flooding from snowmelt, and summer convective storms from Lake Michigan or Lake Huron moisture. Michigan's iron and copper mining legacy leaves communities in the UP with unique water quality and plumbing challenges. Detroit-area combined sewer systems have a documented pattern of sewage backup into basements during rainfall events above 1.5 inches per hour. Michigan Insurance Commissioner regulates claim timelines — contact DIFS if your insurer is delaying beyond 10 business days.
Flood-prone areas: Kerrytown and Old West Side neighborhoods overlie the former Allen Creek channel, experiencing chronic basement flooding when the underground storm drain surcharges. Burns Park features older homes on heavy clay where high groundwater tables overwhelm sump pumps. Lower Town sits in the Huron River floodplain with documented flood history.
Water Category Cost Table — Ann Arbor, MI
Extraction & drying cost per square foot by IICRC water category
| Water Category | $/sq ft |
|---|---|
| Category 1 — Clean Burst supply line, clean appliance overflow | $2.72–$6.74 |
| Category 2 — Gray Dishwasher, washing machine, toilet bowl (no feces) | $6.74–$8.16 |
| Category 3 — Black Sewage backup, floodwater, toilet overflow with feces | $9.59–$12.1 |
Estimates exclude reconstruction (drywall, flooring replacement). National benchmarks: Cat 1 $3.75–$4.25, Cat 2 $4.10–$6.50, Cat 3 $7–$7.50/sq ft — adjusted for Ann Arbor market (3.2–11/sq ft range).