Septic in Hidalgo, TX

Welcome to Hidalgo, where friendly neighborhoods meet practical, down‑to‑earth home care. If you've walked a Hidalgo street and heard a quiet hum from a buried tank, you're not alone—septic systems are a familiar, reliable part of local life.

Is septic common in Hidalgo? Should I expect septic if I own or buy a home? Yes. In Hidalgo and the surrounding areas, many homes rely on septic because they're outside the footprint of city sewer service or sit on larger lots. If you own or are buying a home here, it's safe to expect a septic system unless the property is connected to municipal sewer. It's a good idea to confirm with the seller and the local utility or code official, and to get the system details and maintenance history in writing.

Why homes typically use septic systems in Hidalgo

• Rural layouts and larger lots: Many Hidalgo properties aren't close to centralized sewer lines, so an on-site solution becomes the practical choice.
• Cost and logistics: Extending sewer mains through broad neighborhoods, along farms, or past gates and driveways can be expensive and time‑consuming.
• Soil and site conditions: Local soils and drainage often suit on-site treatment better than trying to force a connection to distant sewer mains.
• Local development patterns: A long tradition of single‑family homes on acreage and smaller subdivisions without direct sewer access keeps septic as a common, dependable option.

High-level explanation (why septic exists here)

In Hidalgo, many homes were built when centralized sewer wasn't practical to reach every parcel. A well‑designed septic system treats household wastewater on site, reducing the need for immediate connections to a city sewer. The basic idea is simple: a tank separates solids from liquids, and a drain field lets treated water seep into the soil where it can safely meet the groundwater.

A few practical notes from a neighbor who's also a local septic pro

• If you're buying, plan a pre‑purchase septic inspection and ask for current pumping records and any past repairs.
• Regular maintenance goes a long way: know your tank size, typical pumping interval, and what not to flush or pour down the drain.
• Simple habits matter: conserve water, space out heavy use, and avoid letting chemicals or fats overwhelm the system.

In the sections ahead, you'll find straightforward guidance on locating your tank, understanding maintenance needs, and choosing a trusted local pro.

Where Septic Systems Are Common in Hidalgo

Rural, unsewered areas

In Hidalgo County, a large share of septic systems serve properties outside the city sewer grid. The Rio Grande Valley's mix of ranch land, small-acreage lots, and colonia-style neighborhoods means many homes rely on on-site wastewater treatment rather than a central sewer system. Septics are common where service extensions are not yet feasible or are cost-prohibitive for developers and homeowners.

Common property types and settings

• Rural acreages (1 acre and up) on the edge of city limits where a sewer line isn't practical.
• Older subdivisions that never connected to a municipal system or were developed before centralized sewer expansion.
• Farms, ranches, and worker housing near agricultural operations, especially where parcels are spread out.

These settings often feature soils and drainage patterns that require design and maintenance tailored to on-site systems. If you're unsure, consult a licensed septic designer about setback distances from wells, property lines, and structures.

Soil and drainage considerations

Hidalgo County sits in the Rio Grande Valley, with soils ranging from permeable alluvial sands to heavier clays and caliche layers. Drainage and groundwater conditions vary by neighborhood, and some parcels sit on floodplains or have perched water tables that affect drainfield performance. Key factors to consider:

• Soil absorption: coarse soils drain quickly but may lack adequate buffering; fine textures may slow absorption.
• Water table: high groundwater in rainy seasons can reduce the drainfield's effective depth.
• Drainage features: proximity to canals, ditches, or flood zones can influence system design and placement.

If you're evaluating a property, a site evaluation by a licensed septic designer is essential to ensure the drainfield will function properly and remain above grade.

How to know if you have a septic system

1. Check your property records or ask the seller; you may have an OSSF permit filed with the state.
2. Look for a septic tank lid or access port in the yard and a drainfield area clear of structures—an installer can confirm.
3. Contact Hidalgo County Environmental Health or the Texas Commission on Environmental Quality (TCEQ) to verify permits and system status.

Maintenance and best practices

• Pump the tank every 3–5 years, or per the designer's recommendations.
• Keep heavy equipment off the drainfield; avoid planting trees or shrubs with deep roots nearby.
• Install water-efficient fixtures to minimize wastewater volume.
• Do not pour fats, oils, grease, solvents, or chemicals down drains.
• Protect the drainfield from contamination by keeping surface runoff away.

Resources for Hidalgo homeowners

• Texas Commission on Environmental Quality (TCEQ) – On-Site Sewage Facilities (OSSF):
• U.S. Environmental Protection Agency (EPA) – Septic systems:

Septic vs Sewer: What Homeowners in Hidalgo Should Know

Key differences

• Septic systems are an on-site wastewater treatment method. Wastewater flows into a tank, then a drain field releases treated water into the soil. Sewer service means your wastewater is collected by a city utility and treated at a centralized plant.
• Availability varies. In Hidalgo, some neighborhoods are tied into municipal sewer lines, while others—especially rural or newer developments without mains—rely on septic systems. Check with your city or county utility to confirm what serves your property.
• Costs and responsibilities differ. With septic, you're responsible for installation, regular pumping, and field maintenance. With sewer, you typically pay a monthly service charge and connection fees (if you're not already connected), with maintenance handled by the utility.

Is sewer available where you live in Hidalgo?

• Distance to mains matters. Homes farther from sewer mains may face higher connection costs or no service at all.
• Local utility maps. City of Hidalgo or Hidalgo County utility departments can confirm service availability and any required conversions from septic to sewer.
• Permits and code. If you switch to sewer, you'll need permits and inspections per local and state rules.

Costs and maintenance: septic vs sewer

• Septic systems
  • Upfront: installation and any required upgrades or replacements.
  • Ongoing: periodic pumping (typically every 3–5 years), inspections, and routine field maintenance.
  • Daily use habits: limit heavy water use, avoid flushing non-biological items, and minimize disposal of fats, oils, and chemical cleaners.
• Sewer connections
  • Upfront: one-time connection or tap fees when joining the municipal system.
  • Ongoing: monthly sewer service charges based on your utility's rate schedule.
  • Maintenance: handled by the utility; no drain field risk on your property.

Environmental and health considerations for Hidalgo

• Drain field health: a well-maintained septic system reduces the risk of groundwater contamination, which is especially important in areas with seasonal rainfall.
• Flooding and soils: Hidalgo's local soils and flood patterns can influence septic performance; ensure proper installation, setback distances, and drainage to protect groundwater and surface water.
• Climate factors: hot Texas summers can affect microbial activity in septic tanks; proper maintenance and limiting loading help preserve system life.

Step-by-step: Evaluate your options

1. Confirm service status. Contact the local city or county utility to verify whether sewer is available and if your property is already metered or needs a connection.
2. Gather cost quotes. Get a current septic pumping quote and a sewer hookup/connection quote from the relevant utility or service providers.
3. Compare long-term costs. Include installation or hookup, monthly charges, and anticipated maintenance when calculating total cost of ownership over 15–30 years.
4. Assess land and soil. If you have a septic system, consider soil percolation, groundwater level, and drainage; a local septic professional can help assess compatibility and risks.
5. Plan for future needs. If you're remodeling, expanding, or selling, factor in potential code upgrades, compliance requirements, and whether sewer service would be advantageous.

Practical tips for Hidalgo homeowners

• Keep good records. Maintain tank pumping receipts, inspections, and any repairs; these help during resale and when scheduling future service.
• Hire licensed pros. Use TCEQ-licensed septic installers/inspectors and reputable sewer utility contractors. For official guidance, see the Texas Commission on Environmental Quality (TCEQ) On-Site Sewage Facilities program: https://www.tceq.texas.gov/permitting/ossf'>https://www.tceq.texas.gov/permitting/ossf.
• Understand your rights and obligations. Review your property's service agreements, franchise terms, and local ordinances to know when you can switch, what approvals are needed, and any environmental protections required.
• Consider official resources. For broader guidance on septic systems in the United States, see EPA's Septic Systems page: https://www.epa.gov/septic'>https://www.epa.gov/septic.

Official resources:

• Texas Commission on Environmental Quality – On-Site Sewage Facilities: https://www.tceq.texas.gov/permitting/ossf
• U.S. Environmental Protection Agency – Septic Systems: https://www.epa.gov/septic

Typical Septic System Types in Hidalgo

Conventional gravity septic systems

• How it works: Wastewater flows from the house into a septic tank, where solids settle; liquid effluent then drains by gravity into a drain field of perforated pipes placed in trenches.
• Pros: Simple design, reliable where soils are well-drained and the groundwater table is deep.
• Cons: Requires adequate soil depth and permeability; performance declines with high clay content or perched water.
• Maintenance: Pump the tank every 2–4 years (usage varies); avoid disposing of grease, solvents, or harsh chemicals; practice water-efficient habits to extend the life of the leach field.

Pressure distribution septic systems

• How it works: An electric pump moves effluent from the septic tank into a network of laterals, distributing it more evenly across the drain field.
• Pros: Better distribution on soils with varying percolation; can accommodate marginal soils or shallow bed conditions.
• Cons: Higher upfront and ongoing costs; needs electricity and regular pump/controls maintenance.
• Maintenance: Annual or semiannual inspections; verify pump and control panel operation; keep the distribution system accessible and free of root intrusion.

Mound systems

• How it works: A lifted, sand-filled mound sits above the native soil to provide the necessary infiltration area when soils are too shallow, too dense, or water tables are high.
• Pros: Enables functioning septic treatment in challenging Hidalgo soils; protects groundwater by providing a contained absorption area.
• Cons: More expensive to install and maintain; needs more land area and protection from compaction.
• Maintenance: Avoid driving or digging on the mound; monitor for wet or soggy spots; schedule regular pumping and system checks.

Chamber systems

• How they work: Drain field trenches use interconnected plastic chambers instead of gravel and PVC pipes, providing flexible, wide-area drainage.
• Pros: Often quicker to install; can be more space-efficient and adaptable to site constraints.
• Cons: Proper slope and connection are essential; cost varies by installation.
• Maintenance: Regular inspections and pump service; look for signs of saturation or poor infiltration.

Aerobic treatment units (ATU) / Aerobic septic systems

• How it works: Adds controlled air to the tank to boost microbial breakdown; treated effluent may discharge to a drain field or secondary treatment stage.
• Pros: Very effective in challenging soils; smaller or more flexible drain fields; better effluent quality.
• Cons: Higher energy use and service requirements; more complex equipment.
• Maintenance: Professional service every 6–12 months; monitor alarms and replace consumables (filters, aerators) per manufacturer recommendations.

Sand filter systems

• How they work: Post-tank effluent passes through a constructed sand filter bed for additional treatment before infiltration.
• Pros: Strong performance in soils with limited permeability or high water tables.
• Cons: Requires space and ongoing maintenance; may need occasional sand bed care.
• Maintenance: Regular inspection and routine pumping; monitor for clogging or surface pooling.

Holding tanks

• How they work: Wastewater is stored in a tank with no on-site drainage; pumped out at regular intervals.
• Pros: Useful when soils are unsuitable for any drain-field or when sewer connection is temporarily unavailable.
• Cons: Requires frequent pumping; odors and space considerations; environmental risk if not managed properly.
• Maintenance: Adhere to a strict pumping schedule; check for leaks or venting issues; ensure proper disposal of pumped waste.

Choosing the right system for Hidalgo

Soils, groundwater depth, and lot conditions in Hidalgo strongly influence system choice. A site evaluation by a licensed designer or septic professional is essential to determine feasible options and code-compliant designs.

1. Obtain a soil and site evaluation to assess percolation and depth-to-groundwater.
2. Consider space, slope, and proximity to wells or structures.
3. Compare long-term costs, maintenance needs, and energy use.
4. Review local permitting requirements with the county or city authority.
5. Hire a licensed installer to design, install, and certify the system, then schedule ongoing inspections.

Official resources:

• EPA: Septic Systems overview and maintenance tips —

Common Septic Issues in Hidalgo

Drain-field saturation and failure

Hidalgo's combination of clay soils, variable percolation, and high groundwater in flood-prone areas can push a drain field toward saturation. Heavy rain events, landscape irrigation, and shallow "soil absorption" zones leave wastewater unable to disperse properly, raising the risk of backups and surface wet areas.

Symptoms:

• Soggy, spongy ground over or near the drain field
• Strong sewage odor around the yard or septic tank lid
• Lush, unusually green patches over the leach field

What to do:

1. Conserve water during wet seasons and heavy rains to reduce load on the system.
2. Keep vehicles and landscaping away from the drain field to prevent compaction.
3. Schedule a professional evaluation if you notice pooling or odors.
4. Consider a drain-field assessment or upgrade if the soil won't absorb efficiently (potentially a mound system or advanced treatment unit, depending on site).
5. Pump the septic tank if needed, as recommended by a licensed contractor.

When to call a pro:

• Persistent odors, wet spots, or backups despite reduced usage
• Suspected root intrusion or soil compaction around the field

Resources: Texas Commission on Environmental Quality (TCEQ) septic systems guidance for Texas: EPA septic systems overview: general guidance on septic maintenance from EPA:

Tree roots and landscape intrusion

Nearby trees and shrubs can damage pipes and drain fields, a common Hidalgo challenge given older landscapes and irrigation practices.

Symptoms:

• Frequent backups or slow drains in multiple fixtures
• Visible cracks or crushed pipes in exposed lines

What to do:

1. Trim or remove invasive roots with a licensed plumber or arborist's help.
2. Install root barriers or reroute lines if feasible.
3. Regularly inspect lines for early signs of intrusion and address promptly.

When to call a pro:

• Invasive root activity is observed or suspected in piping
• Backups recur after minor repairs

Resources: AgriLife Extension resources on septic systems and landscape planning: https://agrilifeextension.tamu.edu

Maintenance gaps and improper disposal

Neglect and improper disposal (feminine products, chemicals, kitty litter, flushable wipes) are common culprits in Hidalgo's homes with aging systems.

Symptoms:

• More frequent pumping needs
• Lids showing leakage or damp soil around the tank

What to do:

1. Establish a regular pumping schedule based on tank size and household use.
2. Use septic-safe products and dispose of chemicals at authorized facilities.
3. Install proper filtration like lint traps and compost yard waste instead of dumping into the system.

When to call a pro:

• Maintenance has been skipped for years
• Recurrent odors or backups despite following guidelines

Resources: EPA consumer information on septic system maintenance; Texas A&M AgriLife Extension septic facts: https://agrilifeextension.tamu.edu/factsheets/septic-systems/

Septic Inspection, Permits & Local Oversight

Who regulates OSSFs in Hidalgo County

Texas state rules govern on-site sewage facilities (OSSFs), but local offices handle permitting, inspections, and certain oversight for unincorporated areas and some municipalities. In Hidalgo County, the County Environmental Health or Building/Health departments typically issue OSSF permits and perform inspections for properties outside city limits or in areas where the county has authority. Incorporated cities may handle permits through their own building or health departments. If you're unsure, start with the Hidalgo County Environmental Health division or your city's public works/building department.

When you need a permit

• New OSSFs: require a full permit package before installation.
• Replacing or upgrading an existing system: requires a permit and plan review.
• Repairs that modify the system layout (e.g., moving trenches, altering drain fields): require a permit.
• Additions or changes to the septic system that affect capacity or setback distances: require a permit.
• Real estate transactions: often require an OSSF inspection or certification as part of closing.

What inspectors look for during an OSSF inspection

• System integrity: tanks, lids, baffles, and access ports are intact and accessible.
• Leaks, backflow, and surface discharge: no evidence of leaks or effluent on the ground.
• Drain-field condition: even, properly buried trench lines with adequate separation from driveways, wells, and property lines.
• Setbacks and clearances: proper distances from wells, streams, property lines, and buildings.
• Permits and records: current permit, installation records, and maintenance history are available.
• Compliance with approved plans: actual installation matches the approved schematic and soil design.

How to apply for an OSSF permit (step-by-step)

1. Confirm jurisdiction: determine whether your property is county or city jurisdiction.
2. Engage a licensed professional: hire an OSSF designer/installer familiar with Hidalgo County requirements.
3. Complete site evaluation and soil assessment: obtain the necessary soil log and site plan from a qualified professional.
4. Prepare permit package: include the design plan, soil evaluation, site sketch, and any other local forms.
5. Submit to the correct authority: deliver the package to the Hidalgo County Environmental Health office or your city department.
6. Pay fees and await review: plan review may require revisions; respond promptly to any questions.
7. Schedule installation and inspection: once approved, schedule the installation and the final inspection after completion.

Real estate transactions and OSSFs

• Seller or buyer due diligence: request an OSSF inspection or certification as part of the sale.
• Pumping prior to sale: many listings benefit from pumping the tank to reduce odors and simplify inspection.
• Repair needs identified in an inspection: obtain a permit and schedule repairs with a licensed installer.
• Documentation: keep copies of all permits, inspection reports, and maintenance records for the new owner.

Maintenance, records, and long-term care

• Regular pumping: typically every 3–5 years depending on tank size, household usage, and manufacturer guidance.
• Maintain access: keep lids and covers clear for easy inspection.
• Keep records: store copies of permit approvals, inspection reports, pump-out receipts, and system evaluations in a central file.
• Watch for signs of trouble: gurgling sounds, toilets that slow to drain, wet areas in the yard, or strong odors may indicate an issue.

Helpful resources and contacts

• Texas Commission on Environmental Quality (OSSF program): official statewide rules, permits, and guidance. https://www.tceq.texas.gov/permitting/ossf
• Local jurisdiction inquiries: contact the Hidalgo County Environmental Health office or your city's building department to confirm who issues permits and conducts inspections for your property. For the county, start at hidalgocounty.us and navigate to Environmental Health or the appropriate public health/permit page.

Septic Maintenance for Homes in Hidalgo

Hidalgo-specific conditions you should know

• Hidalgo sits in the Rio Grande Valley with warm temperatures, clay-rich soils in many neighborhoods, and a relatively high water table in parts of the county. These factors can affect drainage and the performance of drain fields.
• Seasonal rains and occasional flooding can saturate soils around the leach field, slowing treatment and increasing the risk of backups if the system is undersized or overused.
• Soil and groundwater proximity means it's especially important to space and protect the drain field, keep heavy equipment off the area, and avoid planting deep-rooted trees near the system.

How often to pump and inspect

• Pumping frequency depends on household size, water use, and system design. A typical family may require pumping every 3–5 years, but in Hidalgo's warm climate and larger homes, more frequent pumping may be needed if you have heavy disposals (garbage disposal, frequent acute water use) or if the tank fills quickly.
• Have the septic tank(s) inspected at least every 1–3 years by a licensed professional. Inspections verify baffles, sludge and scum levels, and the overall condition of the tank and connecting lines.
• Keep a maintenance log with pumping dates, service notes, and any observations (gurgling sounds, slow drains, wet spots in the yard).

Manage water use to ease pressure on the system

• Spread out high-water-use activities (laundry, dishwashing) rather than running them all at once.
• Use water-efficient fixtures: low-flow toilets, showers, and faucet aerators; fix leaks promptly.
• Be mindful of what goes into the system: limit non-biodegradable items, grease, solvents, paints, pesticides, and harsh cleaners. Additives are not a cure-all and are not a substitute for proper pumping and maintenance.
• If you have a water-softener, talk with your plumber about appropriate discharge management, as brine and regeneration wastes can impact system performance.

Protect the drain field in Hidalgo's climate

• Keep the drain field clear of vehicles, structures, and heavy machinery. Plant only grass or shallow-rooted vegetation nearby.
• Direct downspouts, roof drainage, and sumps away from the drain field to prevent oversaturation.
• Avoid creating a pool of standing water over the drain field after rains; standing water can indicate field saturation and possible issues.

Seasonal considerations and flood readiness

• After heavy rains or flooding events, have a professional check the system before resuming normal use. Water-saturated soils slow biological treatment and can drive effluent toward the surface.
• In drought periods, conserve water to reduce the volume entering the tank and leach field, which helps maintain system balance.

Warning signs you should not ignore

• Backups in toilets or drains, gurgling sounds in plumbing, or sewage odors inside the home.
• Soggy, unusually lush patches of grass over the drain field or wet spots in the yard that persist.
• Frequent need for pumping or repair suggests a larger issue with capacity or soil drainage.

A practical maintenance plan (step-by-step)

1. Locate and map the septic tank(s) and drain field; label access lids.
2. Schedule a professional inspection and, if needed, pumping every 3–5 years or as recommended.
3. Install and maintain water-saving fixtures; fix leaks promptly.
4. Limit trash disposal use and avoid flushing chemicals, solvents, or grease.
5. Protect the drain field: keep vehicles off, trim roots away, and keep irrigation away from the area.
6. After major plumbing work or flood events, have the system inspected before heavy use resumes.

Official resources

• Texas Commission on Environmental Quality (TCEQ) Onsite Wastewater Treatment Systems (OWTS):
• U.S. Environmental Protection Agency (EPA) Septic Systems: https://www.epa.gov/septic
• Texas A&M AgriLife Extension Service (homeowner guidance and local adaptation tips): https://agrilifeextension.tamu.edu

Cost Expectations for Septic Services in Hidalgo

Septic Tank Pumping and Cleaning

• What's included: removing accumulated sludge and scum, inspecting baffles and tank integrity, resealing lids, and arranging disposal at a licensed facility. In Hidalgo, heavy clay soils and clay-pan layers can affect how quickly solids settle, so pumping frequency may be higher for homes with smaller tanks or limited access.
• Typical Hidalgo cost: about $250–$600 per pump, depending on tank size (commonly 1,000–1,500 gallons), access to the tank, and disposal fees. Larger tanks or difficult-to-reach lids can push the price upward.

Septic Tank Inspections (Real Estate / Pre-Purchase)

• What's included: a full tank and lid inspection, baffle condition check, sludge layer measurement, and a quick evaluation of the leach field. For real estate transactions, many lenders in Hidalgo require documentation of a functioning OWTS per local practice and state guidelines.
• Typical Hidalgo cost: roughly $100–$300 for a standard inspection; more if a dye test or camera inspection of pipes is needed.

Drainfield Evaluation and Repair

• What's included: soil and drainfield condition assessment, dye tests if needed, inspection of distribution network, and recommendations (repair vs. replacement). Unique Hidalgo factors include local soil composition (caliche layers and heavy clay) that can influence absorption and may necessitate corrective designs.
• Typical Hidalgo cost: $5,000–$15,000 for targeted drainfield repairs or replacement, with higher-end projects for extensive remediation or mound systems.

New Septic System Installation (Full System)

• What's included: site evaluation, soil percolation tests, system design, permitting, installation of tank, distribution network, and drainfield or mound system, plus system start-up.
• Typical Hidalgo cost: $10,000–$25,000, though actual pricing rises with a complex site (high water table, caliche, or required ATU/mound configurations).

Aerobic Treatment Unit (ATU) Maintenance and Replacement

• What's included: routine service of the ATU, aerator and pump maintenance, filter checks, and effluent discharge line inspection; replacement parts may be needed periodically.
• Typical Hidalgo cost: $350–$900 per annual service; component replacements or upgrades can add to the bill.

Tank Lids, Risers, and Access Improvements

• What's included: installing risers and new lids to make future access safe and straightforward; often reduces the need for digging later.
• Typical Hidalgo cost: $1,000–$2,500, depending on materials (plastic vs. concrete) and excavation requirements.

Abandonment of Septic Tank When Hooked to Sewer

• What's included: pump-out, backfill, tank sealing, and proper disposal of the abandoned system, plus removal or capping of lines leading to the house.
• Typical Hidalgo cost: $300–$800, with variability due to tank size and site access.

Sewer Connection / Conversion to Public Sewer

• What's included: permit coordination, trenching to the sewer main, new service connections, and proper backfill/testing; may include decommissioning of the old septic system.
• Typical Hidalgo cost: $5,000–$20,000, highly dependent on distance to the main and soil conditions.

Preventive Maintenance Plans

• What's included: scheduled annual or semiannual pump-outs, inspections, and a maintenance log to prevent surprises.
• Typical Hidalgo cost: $300–$600 per year for a basic plan; comprehensive plans with extra visits or discounts for multi-unit properties may be higher.

Permitting, Inspections, and Documentation

• What's included: required local and state permits, inspection fees, and necessary paperwork for code compliance.
• Typical Hidalgo cost: permit and inspection fees commonly run $100–$400, depending on the municipality and system type.

Steps to plan a service in Hidalgo

1. Confirm license and disposal: verify the contractor holds a valid septic/OSS license and uses a permitted disposal facility.
2. Gather tank basics: know tank size, access points (lids or risers), and any existing permits or prior work.
3. Compare quotes: ask for itemized estimates that include labor, materials, permits, and disposal.

Official resources

• Texas Commission on Environmental Quality (TCEQ) – Onsite Wastewater Treatment Systems (OWTS):
• U.S. Environmental Protection Agency (EPA) – Septic Systems: https://www.epa.gov/septic
• Texas Real Estate Commission (TREC) – guidance related to septic systems in real estate transactions: https://www.trec.texas.gov/