Septic system requirements in New Mexico
What landplan.io applies when it designs a septic system in New Mexico: the system types allowed, tank sizes, setbacks and soil loading rates, with what septic products cost there.
Updated
Design a septic system for an address in New Mexico
Reviewed landplan.io designs by New Mexico's own rules, which our staff reviewed against the state's regulations. Last published 5 October 2026.
Septic systems allowed in New Mexico
The system types landplan.io permits in New Mexico:
- Elevated Sand Mound System
- Subsurface Pressure Trench System
- Subsurface Trench System
- Infiltrator Advanced Treatment Leachfield
- Infiltrator Advanced Enviro-Septic® (AES)
- Discharging System
Septic tank size in New Mexico
The daily design flow of a home: 150 gal/day per bedroom, at least 240 gal/day. The septic tank is sized from that flow:
| Daily design flow | Minimum tank |
|---|---|
| up to 240 gal/day | 1,000 gallons |
| 240 to 360 gal/day | 1,500 gallons |
| 360 to 600 gal/day | 2,000 gallons |
| 600 to 720 gal/day | 2,500 gallons |
| 720 to 840 gal/day | 2,750 gallons |
| 840 to 920 gal/day | 3,000 gallons |
| 920 to 1,040 gal/day | 3,250 gallons |
Septic setbacks in New Mexico
| From | To | Distance |
|---|---|---|
| Polygon | Existing Septic Component to be Abandoned | 5 ft |
These are the values the landplan.io design engine applies in New Mexico. Confirm a design with the New Mexico health department or your county's before you build.
Parcel data in New Mexico
landplan.io has parcel boundaries for 26 of New Mexico's 33 counties, and part of 5 more: the counties where 93% of the state's people live. Type an address there and the design starts from the parcel.
Septic companies, designers and jobs in New Mexico
- Septic companies and distributors in New Mexico (22)
- Septic designers in New Mexico
- Septic design jobs in New Mexico
Where the rules come from
The regulations and documents landplan.io's New Mexico rules are read from:
Septic rules by county in New Mexico
- Bernalillo County
- Catron County
- Chaves County
- Cibola County
- Colfax County
- Curry County
- De baca County
- Doña ana County
- Eddy County
- Grant County
- Guadalupe County
- Harding County
- Hidalgo County
- Lea County
- Lincoln County
- Los alamos County
- Luna County
- Mckinley County
- Mora County
- Otero County
- Quay County
- Rio arriba County
- Roosevelt County
- San juan County
- San miguel County
- Sandoval County
- Santa fe County
- Sierra County
- Socorro County
- Taos County
- Torrance County
- Union County
- Valencia County
Questions
What septic systems are allowed in New Mexico?
landplan.io permits these system types in New Mexico: Elevated Sand Mound System, Subsurface Pressure Trench System, Subsurface Trench System, Infiltrator Advanced Treatment Leachfield, Infiltrator Advanced Enviro-Septic® (AES) and Discharging System.
What size septic tank do I need in New Mexico?
landplan.io sizes the septic tank in New Mexico from the daily design flow: up to 240 gal/day: 1,000 gallons; 240 to 360 gal/day: 1,500 gallons; 360 to 600 gal/day: 2,000 gallons; larger flows need larger tanks. A home's design flow is 150 gal/day per bedroom, at least 240 gal/day.
Does landplan.io have parcel data in New Mexico?
Yes, for 26 of New Mexico's 33 counties, and part of 5 more.