Septic in New Mexico

Last updated: Mar 21, 2026

If you've spent time in the high desert and open sagebrush of New Mexico, you know this land asks for smart, practical choices about water and waste. Here in NM, many homes rely on on-site septic systems, a dependable solution that fits our spread-out neighborhoods and unique soils as well as our budget.

Is septic common in NM? Should I expect septic if I own or buy a home?

  • In much of New Mexico, especially outside city sewer districts and in rural or mountain areas, septic systems are the norm. Municipal sewer lines don't always reach every neighborhood, so on-site systems are a practical, cost-effective alternative.
  • If you own or buy a home in NM, you should generally expect to deal with a septic system unless the property is connected to a public sewer. It's wise to verify this with the listing, title report, or a licensed inspector, and to budget for routine maintenance.

Why homes typically use septic systems in NM

  • Distance from sewer mains: Extending city sewer lines across ranches, subdivisions, or remote hillside lots can be prohibitively expensive. On-site septic keeps costs reasonable for homeowners while still protecting the environment.
  • Soil and groundwater considerations: New Mexico soils vary widely—from rocky and caliche-rich to sandy and porous. A properly designed septic system uses the on-site soil as part of the treatment process, which is a practical fit for many NM properties when properly installed and maintained.
  • Water conservation culture: Our hot, dry climate makes water use a top concern. Septic systems paired with conservative water use help reduce load on the drainfield and extend the life of the system.
  • Local infrastructure realities: In many communities, especially smaller towns and rural areas, centralized sewer services aren't available to every property. On-site systems provide a reliable alternative that aligns with NM's development patterns.

A friendly reminder from your local neighbor and septic expert: regular maintenance matters. Pumping on schedule, avoiding disposal of inappropriate materials, and having experienced local contractors on speed dial keeps NM septics performing well through the seasons. If you're preparing a purchase, a thorough septic inspection is a smart step—it helps you plan for maintenance, costs, and any upgrades you might need.

Transitioning from here, you'll find practical tips, common questions, and trusted NM-specific guidance to help you keep your system healthy and your family, groundwater, and property protected.

Why Septic Is Common in NM

Rural layouts and municipal sewer gaps

  • New Mexico has many rural, dispersed homes on ranches, homesteads, and small communities. Extensions of central sewer lines to every property simply aren't practical or affordable in large swaths of the state.
  • When sewer mains don't reach a property, a well-designed onsite system becomes the practical, cost-effective option for handling household waste.
  • Local health departments often regulate septic installation and maintenance, especially in rural areas, ensuring safe operation even when sewer service isn't available.

Climate, water, and soil considerations in NM

  • Arid and semi-arid climates mean water use is often restricted and potable water supplies are precious. Septic systems must be designed to handle typical household flows without wasting water or overloading the drainfield.
  • Soils in NM range from sandy and permeable to rocky or shallow to bedrock. Both extremes affect how effluent percolates and whether a conventional drainfield will work.
  • Percolation testing and soil evaluation are essential steps before installation. In areas with poor percolation, mound systems, ET/evapotranspiration beds, or other alternatives may be used to treat and dispose of wastewater.

Regulations and local support

  • In New Mexico, onsite wastewater systems are overseen by the New Mexico Environment Department (NMED) and local county health departments. Permits, design reviews, and inspections help ensure long-term performance and protect groundwater resources.
  • Expect steps such as site assessment, system design approval, a licensed installer's permit, and periodic inspections during installation.
  • Maintenance requirements are typically set by the local authority, with recommended pumping intervals and record-keeping to prevent system failure.

Common NM system types you'll see

  • Conventional gravity systems: Most homes with suitable soil can use a standard drainfield and septic tank.
  • Mound systems: Used where soils are shallow, percolation is slow, or bedrock limits drainage. They extend the drainfield vertically and add engineered fill.
  • Evapotranspiration (ET) beds or alternative advanced systems: Implemented in areas with limited drainage or very shallow groundwater, where evaporation and plant uptake assist treatment.
  • Graywater and smaller-diameter systems: In some NM properties, simplified or adapted systems are used when loads are lower or space is constrained. Always follow local regulations.

Maintenance and best practices for NM homes

  • Pumping and inspection: Most homes need a professional septic pump every 3–5 years, but intervals depend on household size, tank size, and use patterns. Regular inspections help catch problems early.
  • Water usage: Use water efficiently to reduce load on the septic system. Fix leaks, install high-efficiency fixtures, and spread out large water uses.
  • Protect the drainfield: Keep vehicles, structures, and heavy equipment off the drainfield area. Plant only grasses nearby to avoid roots interfering with pipes.
  • Waste disposal: Don't flush wipes, oils, solvents, paints, or chemicals. Use septic-safe products whenever possible and follow local guidelines for disposal.

Quick reference: steps to get a compliant NM septic system

  1. Contact the local county health department to understand permit and design requirements.
  2. Hire a licensed septic designer or engineer familiar with NM soils and climate.
  3. Obtain the necessary permits and have the system approved before installation.
  4. Use a licensed installer to install the system, with required inspections during construction.
  5. Schedule regular maintenance and keep records of pumping and inspections.

Official resources:

How Septic Is Regulated at the State Level

What oversees septic systems in New Mexico

In New Mexico, the primary regulator is the New Mexico Environment Department (NMED), specifically the Water Quality Bureau's On-Site Wastewater Treatment Systems (OWTS) Program. They establish statewide standards for design, soil Evaluation, installation, and decommissioning. Local counties or health districts enforce these rules on the ground, reviewing plans, issuing permits, and performing inspections under NMED guidelines. Official resource:

What is regulated at the state level

  • Permits and plan approvals for new systems and major repairs.
  • Site evaluation and soil testing requirements to determine feasibility and appropriate system type.
  • Design standards, including components, setback distances, and discharge considerations.
  • Licensing for professionals who design, install, or service OWTS components (as required by the local authority and state rules).
  • Installation oversight, inspections during construction, and final system approval.
  • Decommissioning or replacement procedures when a system is no longer suitable.

The permit and design process (typical path)

  1. Hire a licensed On-site Wastewater Designer or Engineer to evaluate the site and draft a plan.
  2. Conduct required soil evaluations and prepare a proposed OWTS design tailored to the lot.
  3. Submit plans to your county or local health district for review and permit issuance.
  4. After approval, hire a licensed OWTS installer to put the system in place per the approved plan.
  5. Schedule and pass the final inspection; obtain final authorization to operate the system if the district requires it.

Maintenance and long-term compliance

  • Follow pumping and maintenance schedules recommended by the system designer and local requirements.
  • Keep records of inspections, pumping, and any repairs; you may need to provide records to the local health district.
  • If a component fails or the system no longer meets performance standards, arrange repairs or replacement per regulatory guidance.
  • Avoid introducing prohibited waste or activities that could damage the system (fats, oils, chemicals, or non-biodegradable items).

Enforcement and what happens if you don't comply

  • Inspectors may issue corrective action orders, fines, or require immediate repairs.
  • Prolonged noncompliance can lead to additional enforcement steps, including restrictions on use or sale of the property until the system is brought into compliance.
  • Staying in touch with your local health district can prevent misunderstandings and help you navigate required fixes.

Where homeowners should start

  • Contact your county or local health district to understand the exact permit pathway for your property, since enforcement and administrative steps can vary by locality while still aligning with state rules.
  • Work with licensed professionals (designer, installer) who are familiar with NM OWTS requirements to avoid delays or noncompliance.

Official resources

Environmental & Soil Factors Across the State

Climate and Water Availability

New Mexico's dry climate and varied elevations mean moisture and infiltration behave differently from place to place. Most regions experience long dry spells with occasional heavy monsoon storms, which can affect drainage and soil moisture levels.

  • In arid soils, infiltration rates can vary widely by texture and depth to rock or caliche.
  • Droughts lower water tables in many areas, but perched groundwater or seasonal springs can occur in others.
  • Monsoonal rain can temporarily overwhelm poorly drained soils, creating surface pooling or saturated zones.

Purposeful site planning helps ensure your septic system handles seasonal swings without backing up or contaminating nearby areas.

Soil Characteristics that Affect Septic Performance

Soil is the primary driver of how well a septic system treats and disperses effluent. The right mix supports safe, predictable operation.

  • Texture and structure: sandy soils drain quickly but may need supplemental moisture management; clays retain water and slow movement; loams are often ideal for leach fields.
  • Depth to groundwater and bedrock: adequate vertical separation is essential to protect groundwater and allow proper treatment.
  • Caliche and hardpan: shallow, compacted layers or calcium carbonate accumulations near the surface hinder absorption; alternatives like mound systems may be needed.
  • Salinity and soil chemistry: high salt or alkaline soils can affect microbial activity and drainage; design choices should accommodate soil chemistry.
  • Slope and drainage: steep slopes or depressions with poor drainage complicate leach-field placement and may require special design.

If soils pose a challenge, work with a designer to explore options such as mound systems, evapotranspiration beds, or alternative layouts that keep effluent away from problem zones.

Groundwater & Bedrock Considerations

Groundwater depth and bedrock presence shape where a system can be placed and how it will perform.

  • Depth to groundwater: greater separation reduces risk to groundwater and improves treatment; NM sites vary, so confirm local requirements.
  • Perched water and fractured rock: localized water pockets or preferential pathways can complicate absorption and distribution.
  • Floodplains and seasonal high water: avoid siting leach fields in flood-prone areas or where floodwaters can reach the system.
  • Springs and seeps: identify potential water sources that could receive system effluent or influence drainage patterns.

Site Assessment Steps for NM

Follow these practical steps to align with state rules and site realities.

  1. Check soil and site data for your parcel, starting with state or county resources. Use official soil data sources when possible to anticipate absorption capacity.
  2. Get a formal site evaluation from a licensed professional and submit findings to the NM environment department for approval. Official NM program:
  3. If soils are marginal, discuss alternative designs with your designer (mound systems, evapotranspiration beds, or advanced treatment units) and verify permit requirements.
  4. Review local setback and containment requirements with your county or planning department before finalizing plans.

Regional Variations in New Mexico

  • Northern mountains: deeper, cooler soils with occasional shallow bedrock; frost considerations may influence seasonal construction.
  • Central high desert: caliche and variable depths in soils; mound or specialty absorption methods can be effective.
  • Southern deserts: hotter, deeper soils in some areas; ensure adequate evapotranspiration considerations and irrigation management for surrounding landscape.

Resources

Typical Septic System Types in NM

Conventional septic systems

A conventional system is the standard setup most New Mexico homes use when soils are suitable. It relies on a septic tank to hold and begin treating solids, followed by a soil absorption field (drainfield) where liquid effluent is dispersed and treated by soil.

  • How it works:
    • Wastewater flows into a two- or three-compartment septic tank, allowing solids to settle.
    • Cleared liquid exits to perforated pipes in trenches or beds (the drainfield) and soaks into the soil.
    • The soil, aided by natural bacteria, further treats the effluent before it reaches groundwater.
  • When it fits:
    • Adequate soil depth and permeability.
    • Sufficient space for a drainfield of appropriate size.
  • Pros:
    • Generally lower cost to install and maintain.
    • Simple, proven design with long track record.
  • Cons:
    • Performance depends on soil; a poor soil or high water table can cause failures.
    • Requires regular pumping of the tank (frequency depends on family size and tank size).

Note: In NM, local codes and the environment department may require specific design standards for conventional systems. For official guidelines, see EPA's septic systems overview: and EPA guidance: https://www.epa.gov/septic.

Aerobic Treatment Units (ATUs) and other advanced treatment systems

ATUs treat wastewater with aeration, producing a higher quality effluent before it enters the drainfield or is discharged for spray irrigation.

  • How it works:
    • An aerobic tank powers a blower or impeller to mix air with wastewater, promoting rapid breakdown of organics.
    • Treated effluent may pass through a disinfectant step and then to a drainfield or spray system.
  • When it fits:
    • Poor soil conditions, high strength wastewater, or stricter discharge requirements.
    • Areas where a smaller drainfield footprint is needed.
  • Pros:
    • Higher level of treatment; can reduce nitrogen or pathogens with proper design.
    • Flexible layout options (drainfield, spray, or hybrid setups).
  • Cons:
    • Higher upfront cost and ongoing energy use.
    • Needs regular maintenance and routine inspections to stay within permit conditions.

Official NM guidance and state-specific requirements are available through NM's OWTS program and EPA resources: https://www.env.nm.gov/owts/ and https://www.epa.gov/septic.

Sand filter and other secondary treatment options

In some NM locations, especially with challenging soils, a secondary treatment step such as a sand filter or recirculating gravel filter is paired with a septic tank. These systems provide an additional treatment stage before the effluent reaches the drainfield.

  • How it works:
    • Primary treatment in the septic tank, then effluent passes through a sand or media filter for extra polishing.
    • Final effluent enters the drainfield or is used for applied landscape irrigation where allowed.
  • When it fits:
    • Soils that don't adequately treat effluent in a drainfield alone.
  • Pros:
    • Can improve effluent quality and system reliability.
  • Cons:
    • More complex and costlier; requires maintenance of filter media.

For official context on these systems and when they're appropriate in NM, consult NM's OWTS resources and EPA's guidance at https://www.env.nm.gov/owts/ and https://www.epa.gov/septic.

Drip irrigation (low-pressure drip) or spray irrigation disposals

Some NM homes use low-water-distribution methods to dispose of treated effluent through buried drip lines or spray irrigation in landscaped areas.

  • How it works:
    • After treatment (often with an ATU or other advanced system), effluent is distributed through drip lines or sprinklers to use-area vegetation.
    • Requires careful design to prevent root intrusion and to meet local water-use regulations.
  • When it fits:
    • Landscaping with water-use efficiency goals; limited space for a traditional drainfield.
  • Pros:
    • Conserves water; can provide plant-friendly disposal.
  • Cons:
    • Higher design, installation, and maintenance requirements; monitoring for soil saturation and tree root interference.

Official resources for NM-specific drip/disposal options can be found via NM's OWTS program and EPA's septic pages: https://www.env.nm.gov/owts/ and https://www.epa.gov/septic.

When Septic Becomes a Bigger Issue in NM

Signs a bigger issue is developing in NM

  • Slow drains, frequent backups, or gurgling fixtures
  • Sewage odors around fixtures, the yard, or the drain field
  • Wet, soggy patches or standing water over or near the leach field
  • Lush, green growth or unusually healthy patches of grass over the drain field
  • Higher than normal water/sewer bills or more frequent pumping than usual
  • Sewage backing up into sinks or toilets, especially after a heavy rainfall

NM-specific factors that can worsen issues

  • Drought and seasonal dryness: dry soils can stress microbial activity in the system and shift how water moves through the drain field
  • Clay soils and shallow groundwater are common in parts of NM and reduce infiltration, increasing failure risk
  • Proximity to wells and water sources: malfunctioning septic systems can threaten nearby drinking water; local health departments set guidance and testing requirements
  • Rainfall bursts after drought: sudden saturation can overwhelm an aging system and cause surface backups
  • Local regulations and permitting: follow state and county requirements for installation, maintenance, and inspections to avoid surprises during home transactions

Quick actions to take now

  1. Conserve water: spread out laundry, fix leaks, and avoid long showers while you assess the issue
  2. Flush only toilet paper and human waste; avoid wipes, fats, oils, and chemical cleaners
  3. Inspect for leaks inside and outside the home; small leaks waste significant water over time
  4. Keep surface drainage away from the drain field; don't park or drive on it
  5. Schedule a professional evaluation if problems persist or you're unsure of the system's condition

When to call a licensed NM septic contractor

  • Persistent odors, repeated backups, or sewage in the yard
  • Standing water or unusually damp areas over the drain field that don't dry out
  • Significant changes in water usage (new occupants, irrigation increases) or a system overdue for pumping
  • If you're buying a home and want a pre-purchase assessment of the septic system

What to expect during a NM-focused evaluation

  • A licensed septic contractor will inspect the tank, baffles, and the drain field for signs of failure
  • They may pump the tank to remove solids and assess the remaining capacity and condition
  • The field will be tested for soil saturation, infiltration, and effluent dispersion
  • The provider will review NM regulations and provide a maintenance or repair plan tailored to your property

Practical prevention for NM homeowners

  • Pump on a schedule based on tank size and household use; typical intervals range from 2–5 years
  • Manage water use, especially during dry months and peak irrigation periods
  • Avoid chemical drain cleaners, solvents, and excessive grease disposal
  • Planting near the system: keep trees and deep-rooted shrubs away from the drain field to protect piping
  • Keep thorough maintenance records; note pumping dates, repairs, and any inspections
  • Be mindful of what goes into the system; educate household members on proper disposal practices

Official NM resources

Counties in NM With Significant Septic Use

Bernalillo County

In rural pockets outside the Albuquerque metro, septic systems remain common where sewer lines don't reach or where subdivisions predate central sewer.

  • Conditions that lead to septic use:
    • Unsewered, rural areas with dispersed homes and smaller sewer districts.
    • Soil and slope that make centralized sewer or leach-field siting difficult.
    • Older neighborhoods or developments that never connected to a municipal system.
  • Homeowner realities:
    • Regular maintenance is key in arid soils and shallow groundwater zones.
    • Pumping every 3–5 years is typical; inspections after drainage issues help prevent failures.
  • Resources:

Doña Ana County

Much of Doña Ana County relies on septic systems outside Las Cruces and other incorporated areas where centralized sewer service isn't available or affordable.

  • Conditions that lead to septic use:
    • Rural, unincorporated communities and farms with individual well water.
    • Terrain and soil types that complicate sewer expansion.
    • Areas where new development occurred before sewer infrastructure was planned.
  • Homeowner realities:
    • Watch groundwater considerations in desert regions; avoid draining into nearby streams.
    • Regular maintenance and proper disposal practices extend system life.
  • Resources:

Santa Fe County

Santa Fe County contains scenic rural zones where septic systems are prevalent outside the city limits and in older neighborhoods.

  • Conditions that lead to septic use:
    • Unsewered rural tracts with larger lots and hillside terrain.
    • Bedrock, rock outcrops, or shallow soils complicating sewer corridor placement.
    • Growth in remote subdivisions that hasn't been linked to a centralized system.
  • Homeowner realities:
    • Consider site-specific design, especially on slopes and near watercourses.
    • Maintain records of inspections and pumping to prevent field failures.
  • Resources:

Sandoval County

Sandoval includes both denser suburbs and widely spaced rural areas where septic systems remain common.

  • Conditions that lead to septic use:
    • Unsewered or partially serviced rural areas outside Rio Rancho and Bernalillo.
    • Soil types that hinder easy connection to existing sewer lines.
    • Historic subdivisions installed before municipal sewer expansion.
  • Homeowner realities:
    • Plan for routine maintenance; use water wisely to protect leach fields.
    • If upgrading or expanding, verify septic capacity and setback requirements.
  • Resources:

San Juan County

The Four Corners region has large rural stretches where septic systems are common, especially off main highways and in Navajo Nation communities with limited sewer service.

  • Conditions that lead to septic use:
    • Remote, unsewered areas and limited wastewater treatment options.
    • Soil and groundwater considerations that complicate public sewer expansion.
    • Community layouts that rely on individual systems rather than centralized plants.
  • Homeowner realities:
    • Regular pumping and inspections are crucial in sandy or clay soils.
    • Engage licensed professionals familiar with local geology and regulations.
  • Resources:

McKinley County

Rural McKinley County relies heavily on septic systems outside towns like Gallup and other municipalities.

  • Conditions that lead to septic use:
    • Sparse housing density and distant sewer lines.
    • Diverse soils and elevations that challenge gravity sewer design.
    • Historic and new developments that weren't connected to a central system.
  • Homeowner realities:
    • Prioritize regular maintenance; protect leach fields from heavy vehicle traffic.
    • Plan for field upgrades if new construction increases wastewater loads.
  • Resources:

Valencia County

Valencia contains rural communities and pockets of unsewered land surrounding the Albuquerque area.

  • Conditions that lead to septic use:
    • Rural subdivisions and farms without city sewer access.
    • Soil variability and slopes that complicate centralized sewer expansion.
    • Growth areas where sewer lines have not kept pace with development.
  • Homeowner realities:
    • Freshen up maintenance routines; consider upgrades if the system ages.
    • Coordinate with local inspectors for proper permit requirements.
  • Resources:

Taos County

Taos County's mountainous and rural landscape means many homes operate on septic systems outside towns.

  • Conditions that lead to septic use:
    • Steep terrain, rocky soils, and shallow bedrock impede sewer trenching.
    • Remote properties with limited access to municipal services.
    • Historic settlements and new cabins designed with on-site systems.
  • Homeowner realities:
    • Field setbacks and winter temperature considerations affect performance.
    • Regular pumping and seasonal inspections help prevent failure.
  • Resources:

Rio Arriba County

Rural Rio Arriba County features many unsewered homes outside main towns.

  • Conditions that lead to septic use:
    • Long distances between residences and any centralized sewer lines.
    • Soil and topography that challenge sewer construction.
    • Agricultural or ranch land with private waste management needs.
  • Homeowner realities:
    • Frequent system checks, especially after heavy rain or spring thaws.
    • Consider local soil tests before any major system changes.
  • Resources:

Socorro County

Socorro's rural expanses rely on septic where municipal service isn't feasible.

  • Conditions that lead to septic use:
    • Sparse population with limited sewer infrastructure.
    • Challenging soils and terrain for centralized treatment.
    • Older housing stock without sewer hookups.
  • Homeowner realities:
    • Maintain records and schedule periodic pumping.
    • Inspect system after landscaping or excavation projects.
  • Resources:

Cibola County

Western NM communities often use septic systems due to distance from treatment plants.

  • Conditions that lead to septic use:
    • Unsewered rural areas with dispersed homes.
    • Difficulty financing or extending sewer lines across rugged terrain.
  • Homeowner realities:
    • Safe disposal practices protect groundwater in arid climates.
    • Regular inspection and early intervention prevent costly repairs.
  • Resources:

Los Alamos County (rural outskirts)

The county includes remote areas where septic systems serve properties not connected to town sewer.

  • Conditions that lead to septic use:
    • Areas outside the municipal sewer boundaries.
    • Terrain that makes sewer extension impractical.
  • Homeowner realities:
    • Plan for higher-performance systems in hillside locations.
    • Keep up with maintenance to protect nearby water sources.
  • Resources:

Buying or Owning a Septic Home in NM

Pre-purchase checks

  • Hire a licensed septic inspector to perform a full On-Site Wastewater Treatment System (OWTS) assessment. Ask for a written report that covers tank size, type, drainfield condition, and accessibility.
  • Request documentation: installation date, last pump date, service history, any repairs, and the original design or as-built plan.
  • Verify permits and records with the county and the New Mexico Environment Department (NMED) OWTS program. Having a complete permit history helps you assess the system's lifecycle and any past issues.
  • Look for obvious red flags around the home: backups or slow drains inside, gurgling noises, strong odors, or damp, unusually lush patches of grass over the drainfield.
  • Confirm setbacks and site constraints with local code requirements (distance to wells, structures, driveways, and property lines). If unsure, have the inspector review the site map and any available as-built.
  • Ask about warranties, service contracts, or guarantees on the system and work performed by prior owners or installers.

During ownership

  • Follow the maintenance plan provided by the installer or report. For conventional tanks, plan pump-outs every 3–5 years or as recommended based on household size and usage; more frequent servicing may be needed if there are disposals, large families, or specialty components.
  • Protect the drainfield: keep vehicles off the system area, plant only grass, and avoid deep-rooted trees and shrubs nearby. Do not drive, park, or build on or near the drainfield.
  • Conserve water to reduce load on the system: fix leaks promptly, use high-efficiency fixtures, and spread laundry and dishwasher loads rather than running many cycles at once.
  • Use septic-safe products and avoid flushable wipes, grease, solvents, pesticides, and large quantities of chemicals that can disrupt beneficial bacteria.
  • Maintain clear access to the tank lid and marker so future servicing is straightforward; document any changes to the yard or landscaping that affect the system.
  • If you're planning renovations or additions, check with a septic professional before work begins to prevent overloading or damaging the system.

Maintenance timeline (simple starter plan)

  1. Annually: have a licensed pro inspect the system, check baffles, and confirm any alarms or pumps are functioning.
  2. Every 3–5 years (adjust as advised): pump out the septic tank and inspect the drainfield for signs of distress.
  3. After every major household change (e.g., additional bedrooms, full renovations): reassess the system capacity and load with a pro.
  4. Keep a maintenance log: date of service, pump-out receipts, and any observed issues for future buyers or inspections.

Red flags to watch for

  • Frequent clogs, slow drainage, or sewage odors inside the home.
  • Wet or soggy areas, or strong effluent smell over the drainfield.
  • Standing water in the system area after rainfall or irrigation.
  • Backups or air bubbles in toilets or drains when washing machines run.
  • Evidence of root intrusion, cracks, or damaged lids; delamination or soil heaving near the tank.

Working with a septic professional

  1. Get local referrals from neighbors, builders, or home inspectors familiar with NM OWTS.
  2. Verify licenses, insurance, and any state-specific certifications.
  3. Request a detailed, written scope of work and a breakdown of costs; ensure it includes permit handling with NMED if required.
  4. Ask for a maintenance plan and a projected pumping schedule tailored to your household.
  5. Request copies of reports and maintain a dedicated file for future buyers.

Resources