Septic system requirements in Montgomery County, Texas
The septic rules landplan.io applies in Montgomery County, what a septic tank costs there, and the parcel data we hold.
Updated
Design a septic system for an address in Montgomery County
Texas's state rules apply in Montgomery County: landplan.io has no county rules of its own here. State rules: Reviewed See Texas's rules
Septic systems allowed in Montgomery County
The system types landplan.io permits in Montgomery County:
- Absorptive Drainfields
- ET Drainfields
- Low Pressure-dosed Drainfields
- Drip Irrigation
- Mound
- Surface application disposal
- Soil Substitution System
Septic tank size in Montgomery County
The daily design flow of a home: 75 gal/day per bedroom, at least 225 gal/day. The septic tank is sized from that flow:
| Daily design flow | Minimum tank |
|---|---|
| up to 250 gal/day | 750 gallons |
| 250 to 350 gal/day | 1,000 gallons |
| 350 to 500 gal/day | 1,250 gallons |
Septic setbacks in Montgomery County
| From | To | Distance |
|---|---|---|
| LineString | Private water line | 10 Ft |
| LineString | Streams, Lakes, Creeks | 50 Ft |
| Point | Public water wells | 50 Ft |
| Point | Wells and underground cisterns | 100 Ft |
| Polygon | Existing Septic Component to be Abandoned | 5 ft |
| Polygon | Lakes, Pond, or Retention Basin | 50 Ft |
| Polygon | Swimming Pools | 5 Ft |
| Polygon | Underground Easements | 1 Ft |
Soil loading rates in Montgomery County
| Table | Lowest | Highest | Soil groups |
|---|---|---|---|
| Soil Loading Rate | 0.1 gal/day/ft² | 0.5 gal/day/ft² | 5 |
landplan.io picks the rate from the soil test: texture, structure and percolation.
These are the values the landplan.io design engine applies in Montgomery County. Confirm a design with the Texas health department or your county's before you build.
Parcel data in Montgomery County
landplan.io has parcel boundaries for Montgomery County (99.4% of its area): type an address and the design starts from the parcel.
Septic companies, designers and jobs in Texas
Where the rules come from
The regulations and documents landplan.io's Montgomery County, Texas rules are read from:
- Chapter 285 - On-Site Sewage Facilities (OSSF) (30 Tex. Admin. Code (TAC) Chapter 285)
- Chapter 285 - On-Site Sewage Facilities, as adopted June 14, 2023 (TCEQ clean copy, with the full Table X, 285.91(10)) (30 TAC 285.91(10), Table X)
- North Carolina State University Sea Grant College Publication UNC-SG-82-04 (285.33(d)(3))
Near Montgomery County
- San jacinto County
- Walker County
- Harris County
- Grimes County
- Waller County
- Liberty County
- Madison County
- Polk County
- All of Texas
Questions
What septic systems are allowed in Montgomery County?
landplan.io designs by Texas's state rules there and permits: Absorptive Drainfields, ET Drainfields, Low Pressure-dosed Drainfields, Drip Irrigation, Mound, Surface application disposal and Soil Substitution System.
What size septic tank do I need in Montgomery County?
landplan.io sizes the septic tank in Montgomery County from the daily design flow: up to 250 gal/day: 750 gallons; 250 to 350 gal/day: 1,000 gallons; 350 to 500 gal/day: 1,250 gallons. A home's design flow is 75 gal/day per bedroom, at least 225 gal/day.
How far must a septic system be from a well in Montgomery County?
landplan.io keeps these distances in Montgomery County: Point to wells and underground cisterns: 100 Ft; Point to public water wells: 50 Ft.
Does landplan.io have parcel data for Montgomery County, Texas?
Yes: parcel boundaries cover Montgomery County (99.4% of its area).