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Todd Mission, Texas
Inside Todd Mission's city limits, shrink-swell clay limits houses without basements on 0% of mapped land. A shallow water table limits basements on 94%, the highest of 6 cities in Grimes County.
That clay share is below Grimes County's 61%. FEMA's flood data list 10 flood losses since 2016 in ZIP code 77363 overlapping the city.
Data as of October 13, 2026 · sources · in Grimes County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 1 overlapping ZIP
Foundation repair in Todd Mission
Foundation repair in Todd Mission: shrink-swell clay limits slab homes on 0% of Todd Mission's mapped land.
| Who designs the repair | The ASCE Texas Section's repair guidelines say a Texas-licensed engineer should evaluate the foundation and design the repair (2022 guidelines) |
| Prices | Cost guide ranges compared |
Soil under Todd Mission city limits
| Expansive clay (limits slab homes) | 0.0% |
| High water table (limits basements) | 93.8% |
| Septic fields very limited | 87.1% |
| Clay swell (LEP, by area) | 3.0% |
| High-swell land (LEP 6%+) | 0.0% |
| Mapped soil | 1,287 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Conroe | 40% | 0% |
| Depcor | 21% | n/a |
| Fetzer | 11% | n/a |
| Nahatche | 11% | n/a |
| Boy | 5% | n/a |
| Splendora | 5% | n/a |
What the numbers mean here
On 94% of Todd Mission's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 87% of the land very limited for septic absorption fields.
Drought in Grimes County
78.3% of Grimes County is in drought (D1 or worse) on the October 13, 2026 map. County detail.
Flood losses by ZIP code
FEMA flood records since 2016 in the ZIP codes that overlap Todd Mission. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 77363 | 100% | 10 | $253,985 |
Homes
Todd Mission has fewer than 100 housing units in the ACS 2020-2024 estimates, too few for reliable shares.
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Plantersville | 5 mi | 19% | 77% |
| Magnolia | 7 mi | 2% | 75% |
| Stagecoach | 11 mi | 11% | 75% |
| Montgomery | 12 mi | 81% | 27% |
| Waller | 14 mi | 2% | 59% |
| Prairie View | 15 mi | 2% | 47% |
| Tomball | 17 mi | 1% | 41% |
| Navasota | 18 mi | 80% | 8% |
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026). Methods · Data status