Environmental Hazards for the Texas Real Estate Exam

The official Pearson VUE outline places five of this area's nine scored items under property conditions and environmental issues. That makes breadth important. A candidate who memorizes only lead, asbestos, and radon is leaving several named outline points uncovered.

Use this page as your field guide. For each topic, learn one defining fact, one legal connection, and the safest role for a sales agent.

The environmental topics in the official outline

Lead-based paint

Federal disclosure rules apply to most housing built before 1978, called target housing. Before a buyer or tenant becomes obligated, the seller or lessor generally discloses known lead-based paint and hazards, provides available records, supplies the EPA pamphlet, and includes the required warning and acknowledgments. A purchaser also receives a 10-day opportunity for a lead inspection or risk assessment unless the parties agree in writing to another period or the buyer waives it in writing.

The rule does not require the owner to test or remove lead. That distinction is a favorite distractor. For the exact exemptions, timing, agent responsibility, and the revised 2026 pamphlet, use the lead-based paint disclosure guide.

Asbestos, radon, and mold

Asbestos

Asbestos was used in insulation, pipe wrap, floor tile, roofing, and textured materials. The exam word to remember is friable. Friable material can be crumbled or reduced to powder by hand pressure and is more likely to release fibers. Intact material may be managed in place after professional evaluation. An agent should never scrape, sample, or recommend do-it-yourself removal.

Federal law does not create a single asbestos disclosure form for every residential resale. Known asbestos can still be a material property condition under applicable state law and general disclosure duties.

Radon

Radon is a colorless, odorless radioactive gas produced by the natural breakdown of uranium in soil and rock. Testing is the only way to know a home's level. The EPA recommends fixing a home at 4 picocuries per liter, or pCi/L, and considering mitigation between 2 and 4 pCi/L.

The 4 pCi/L figure is not a nationwide requirement to test every property before sale. On an exam question, separate an EPA health recommendation from a transaction mandate.

Mold

Mold follows moisture. The sensible sequence is to address the water source and then use qualified people to assess or remediate the affected material.

Texas Occupations Code Chapter 1958 regulates mold work. The exam-worthy distinctions are:

• A license is generally required for regulated mold assessment or remediation.
• Work affecting less than 25 contiguous square feet is outside the licensing requirement in Section 1958.102(c).
• A license holder generally may not assess and remediate the same project because Section 1958.155 separates those roles.
• A 2025 amendment added a limited exemption for an owner, managing agent, or employee working on residential property with fewer than 10 dwelling units when the person is not engaged in the mold business for the public.
• When a seller has mold remediation certificates from the preceding five years, Section 1958.154(b) requires delivery of those certificates to the buyer.

Do not turn the 25-square-foot line into a safety opinion. It is a Texas licensing threshold, not a statement that a small area is harmless.

Groundwater contamination and underground storage tanks

An underground storage tank, or UST, can leak gasoline, heating oil, or chemicals into soil and groundwater. Former gas stations, vehicle facilities, farms with fuel storage, and industrial sites deserve careful historical review.

Here is the legal distinction candidates often miss:

• CERCLA generally excludes petroleum, including crude oil and petroleum fractions, from its hazardous-substance definition.
• Federal UST rules are primarily authorized by Subtitle I of the Resource Conservation and Recovery Act, or RCRA, and appear in 40 CFR Part 280.
• States usually lead UST release response and enforcement.

That does not make a petroleum leak harmless or liability-free. It means the correct legal pathway is often the UST program and state law, not a routine CERCLA answer. A former gas station can also contain nonpetroleum hazardous substances, so an environmental professional must evaluate the facts.

Waste disposal sites and brownfields

A waste disposal site may contain discarded hazardous substances and can create cleanup, land-use, financing, and disclosure issues. A brownfield is real property whose expansion, redevelopment, or reuse may be complicated by the presence or potential presence of a hazardous substance, pollutant, or contaminant.

Brownfield does not mean unusable. Federal and state programs encourage investigation, cleanup, and reuse. It also does not mean contamination has been conclusively proved. The definition includes potential presence.

Past uses that deserve attention include dry cleaners, metal-plating businesses, chemical plants, landfills, salvage yards, and pesticide storage. The agent's role is to identify known facts and historical red flags, recommend appropriate investigation, and avoid promising that a site is clean.

Floodplains, flood zones, and flood insurance

These three terms are related but not interchangeable:

• A floodplain is land susceptible to flooding.
• A flood zone is a FEMA map designation reflecting a level or type of risk.
• A flood-insurance requirement depends on the zone, the building, and the financing. A building in a Special Flood Hazard Area with applicable federally related financing is the classic mandatory-purchase scenario.

Standard homeowners policies generally exclude flood damage, so a buyer may need a separate flood policy even when a lender does not require one.

Texas Property Code Section 5.008 asks covered residential sellers about floodplain status, prior flooding, reservoir or flood-pool conditions, and certain flood claims or assistance. The notice is based on the seller's knowledge. FEMA maps are important, but a map designation does not erase a known flooding history.

Clean Air Act, Clean Water Act, and EPA

The Environmental Protection Agency, or EPA, administers and enforces major federal environmental laws. On exam day, match the law to the medium:

The Clean Air Act and Clean Water Act affect land use because a property's proposed operation may need permits or face limitations. The national licensing exam generally tests recognition, not permit engineering.

CERCLA, SARA, and environmental due diligence

CERCLA, enacted in 1980 and commonly called Superfund, lets the federal government respond to hazardous-substance releases and recover costs from defined potentially responsible parties. Liability is strict and retroactive. Courts may impose joint and several liability when the harm is indivisible.

The Superfund Amendments and Reauthorization Act of 1986, or SARA, strengthened CERCLA. SARA Title III also created the Emergency Planning and Community Right-to-Know Act, or EPCRA, which supports emergency planning and public information about hazardous chemicals.

For buyers, distinguish three types of environmental work:

A current Phase I can help satisfy CERCLA's all appropriate inquiries requirement. It does not automatically grant a defense. The buyer must fit the statutory protection and meet any continuing obligations after acquisition. Current EPA-recognized standards include ASTM E1527-21 for most commercial real estate and ASTM E2247-23 for forestland or rural property. All appropriate inquiries generally must be completed within one year before acquisition, with specified components updated within 180 days.

Wetlands protection

Wetlands are areas where water conditions support characteristic soils and vegetation. Under Clean Water Act Section 404, a discharge of dredged or fill material into covered waters may require a permit from the US Army Corps of Engineers. EPA develops environmental criteria and has oversight responsibilities.

Two exam cautions matter. First, not every wet area is automatically within federal jurisdiction. Second, building near wetlands is not automatically forbidden. The real questions are jurisdiction, the proposed activity, exemptions, and permitting. A buyer considering fill, roads, pads, or development should obtain a qualified wetlands determination before relying on an agent's impression.

What should an agent do?

Use a simple four-step response:

1. Identify the fact. Is it known, observed, documented, or merely suspected?
2. Disclose what is known. Never hide a material condition or alter a seller's answer.
3. Do not diagnose. Avoid saying material is asbestos, mold is harmless, or a tank did not leak.
4. Refer and document. Recommend an appropriate inspector, environmental professional, engineer, agency map, or legal adviser, and keep the communication clear.

The best exam answer is usually the one that protects the client's informed choice without pushing the agent outside the license.

Original practice questions

1. A buyer is considering a former gas station. The most accurate statement is:

A. Petroleum releases are always ordinary CERCLA hazardous-substance cases

B. A Phase I guarantees that the buyer can never face environmental liability

C. Petroleum UST releases are commonly addressed under RCRA Subtitle I and state programs

D. The sales agent should collect a soil sample before recommending the property

Answer: C. CERCLA generally excludes petroleum from its hazardous-substance definition, while federal UST rules arise primarily under RCRA Subtitle I. A Phase I is due diligence, not an automatic immunity, and sampling belongs to qualified professionals.

2. Which review is most likely to include targeted soil or groundwater sampling?

A. Phase I Environmental Site Assessment

B. Phase II Environmental Site Assessment

C. Environmental Impact Statement

D. Seller's disclosure notice

Answer: B. A Phase II investigates a concern through targeted sampling and analysis. A Phase I is mainly records, history, interviews, and site observation. An EIS evaluates a proposed major federal action.

3. An agent sees crumbling pipe insulation in an older building. What is the best response?

A. Break off a sample and send it to a laboratory

B. Tell the buyer it is asbestos and calculate removal cost

C. Disclose the observed condition and recommend evaluation by a qualified professional

D. Say nothing because federal law has no universal asbestos home-sale form

Answer: C. The agent should communicate the known observation and recommend qualified evaluation. The absence of a universal federal sale form does not justify concealing a known material condition.

4. A buyer plans to place fill on low land that may contain wetlands. What is the key federal issue?

A. Clean Air Act mobile-source standards

B. Clean Water Act Section 404 jurisdiction and permitting

C. The lead-based paint warning statement

D. The federal 10-day inspection period

Answer: B. Section 404 addresses discharges of dredged or fill material into covered waters. Jurisdiction and the proposed activity must be evaluated before the buyer assumes the land is buildable.

Frequently asked questions

Does federal law require every home seller to test for asbestos, radon, or mold?

No. There is no general federal rule requiring every residential seller to test for those three conditions before sale. Known material facts may still require disclosure, and specific state, local, building, or remediation rules can apply.

Is a Phase I enough to protect every buyer from CERCLA liability?

No. A timely, compliant Phase I can support all appropriate inquiries, but the buyer must meet every element of the relevant statutory protection and any continuing obligations.

Does every property in a FEMA flood zone require flood insurance?

No. FEMA maps contain many zone designations. The familiar mandatory-purchase rule concerns buildings in Special Flood Hazard Areas with applicable federally related financing. Buyers may still choose coverage elsewhere.

What is the safest response when an agent suspects contamination?

State the known facts, avoid a technical conclusion, recommend a qualified environmental professional, and document the referral.

Sources and verification

This lesson was checked against Pearson VUE outline #094401, revision 01/2026, and current EPA, HUD, FEMA, Army Corps, and Texas primary sources on August 12, 2026. The review also confirmed the 2025 Texas small-residential-property mold exemption, current ASTM standards accepted for all appropriate inquiries, and the distinction between federal wetlands jurisdiction and merely wet ground.

• Pearson VUE, Texas Real Estate Candidate Handbook and Content Outlines
• EPA and HUD, Real Estate Disclosures About Potential Lead Hazards
• EPA, Radon action level
• EPA, asbestos frequently asked questions
• Texas Occupations Code Chapter 1958
• EPA, releases from underground storage tanks
• EPA, petroleum brownfields
• EPA, Clean Air Act summary
• EPA, Clean Water Act summary
• EPA, Clean Water Act Section 404
• EPA, all appropriate inquiries
• EPA, Superfund liability
• EPA, NEPA review process
• FEMA, Flood Insurance
• Texas Property Code Section 5.008

This article is exam-prep education, not legal, environmental, health, or engineering advice. Confirm current law and property-specific facts with the appropriate authority and qualified professionals.