Quick answer
For water damage in Maplewood, MO, shut off your main valve first, or turn off the well pump breaker if you are on a private well. Call Missouri American Water at 1-866-430-0820 for a main break, or MSD at 314-768-6260 for a sewer backup. Then call a water damage restoration company; drying should start within 24 to 48 hours. Missouri insurers must acknowledge your claim within 10 working days.
Do this first
Local water and sewer lines.
- Shut off the water. Close the main valve at your house. For a main break or water pouring from the street or meter, call Missouri American Water at 1-866-430-0820, open 24/7 for emergencies.
- Make it safe and document it. Cut power to wet rooms from a dry spot, photograph the damage, then report the claim.
- Start drying within 24 to 48 hours. If sewage comes up through a basement floor drain, call MSD at 314-768-6260, open 24 hours. Maplewood's sewer lateral program helps with repairs to the line from your house to the main.
Deer Creek runs through Maplewood and flooded in the November 2024 storms. St. Louis County had 10 flash flood warnings in 2020. Never drive into water over a road.
What to know about water damage in Maplewood
$3,232
The average cost of a sewer lateral repair under Maplewood's program, which handles about 60 repairs a year and is paid for by a $50 yearly fee.
Source: Maplewood City Council work session packet, April 22, 2025
15 damaged homes
After the July 2022 storms and flooding, 19 homeowners who listed Maplewood as their city in ZIP 63143 registered for FEMA aid. Inspectors found damage at 15 homes, totaling about $63,349. Owners who did not apply are not counted.
How the lateral program works
Before the city will act on a sewer lateral claim, the owner must have the line cabled and videotaped.
Source: Maplewood City Council work session packet, April 22, 2025
Deer Creek floods
Spectrum News reported that Deer Creek in Maplewood caused flooding in early November 2024, the same storms that pushed the Meramec River toward a crest.
Source: Spectrum News St. Louis
A city since 1908
Maplewood incorporated in 1908. Missouri American Water runs a separate Maplewood district for the city's water.
Sources: City of Maplewood, history; Missouri American Water, Maplewood water report
Homes in Maplewood
The median home dates to 1952 and about 62% were built before 1960. About 40% are owner-occupied.
Freezes and rain
The NOAA weather station at the St. Louis Science Center, about 3.0 miles away, averages 79.3 nights a year at or below 32°F and 24.6 at or below 20°F. In half of years the first freeze comes by November 4 and the last one after April 1. Pipes in outside walls, unheated basements, and crawlspaces are the first to split. It also averages 43.91 inches of rain a year.
Check your ZIP
How often does St. Louis County get flash flood warnings?
The National Weather Service issued 58 flash flood warnings that included St. Louis County from 2016 through November 12, 2026, peaking at 10 in 2020. Each one means flooding is happening or about to happen.
Source: our count from the National Weather Service warning archive, Iowa Environmental Mesonet.
| Year | Warnings |
|---|---|
| 2016 | 3 |
| 2017 | 0 |
| 2018 | 1 |
| 2019 | 8 |
| 2020 | 10 |
| 2021 | 2 |
| 2022 | 8 |
| 2023 | 4 |
| 2024 | 8 |
| 2025 | 8 |
| 2026 | 6 |
Cost and insurance in Maplewood
How much does water damage restoration cost in Maplewood?
Most jobs run $450 to $16,000 (Angi). Deer Creek water that enters from outside is a flood claim. Older basements with block walls hold water; get the walls tested, not just the floor.
Water removal and restoration in Maplewood
The company that answers handles burst pipes, basement sewer backups, water heater failures, sump pump failures, and storm water seeping through older block walls, plus burst pipes, appliance leaks, drying, and septic backups.
Maplewood questions
Who do I call for a water main break in Maplewood?
Missouri American Water at 1-866-430-0820. It takes emergency calls 24/7.
Who do I call for a sewer backup in Maplewood?
MSD at 314-768-6260, open 24 hours. MSD says its Project Clear work has cut sewer backups by 25%.
Does Maplewood help pay for sewer lateral repairs?
Yes. A $50 yearly fee funds about 60 repairs a year. Have the line cabled and videotaped first, then contact the city at 314-645-3600.
Which ZIP code does this page cover?
ZIP 63143, which is mostly Maplewood and also takes in parts of nearby St. Louis County.