Water Risk Profile — ZIP 63106
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
St. Louis area water damage risks include Missouri's spring storm season and river corridor flooding. St. Louis's combined sewer overflow system releases raw sewage into basements during heavy rain events affecting tens of thousands of properties annually — the Metropolitan Sewer District has been under EPA consent decree for decades. Kansas City faces similar overflow challenges in older neighborhoods. Sewer backup endorsements are essential in both metro areas. Missouri's tornado season (March–May) produces wind-driven rain that penetrates roofs and creates interior water damage even in homes that avoid direct tornado damage.
Flood-prone areas: Carondelet in south St. Louis sits close to the Mississippi River floodplain and experienced basement flooding during the historic 1993 and 2019 river crests — the neighborhood's combined sewer system discharges raw sewage into basements when rain exceeds 0.3 inches per hour, and the Metropolitan Sewer District has been under EPA consent decree for over a decade to address these overflows. Lemay and Mehlville in south St. Louis County face severe risk from the Meramec River, which set consecutive record crests in 2015 and 2016 that flooded thousands of homes in the Watson Road corridor and prompted a major federal buyout program for the most at-risk properties.
Water Category Cost Table — St. Louis, MO
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 St. Louis market (3.2–11/sq ft range).