Environmental Hazards for the Texas Real Estate Exam

Environmental hazards show up on the Texas exam because they show up in real deals. A buyer asks about the popcorn ceiling, a seller admits the house flooded, an inspector flags mold in a bathroom. You do not need to be a scientist. You need to know what each hazard is, who handles it, and where your disclosure duty starts and stops.

This guide walks the six hazards the exam tests, then covers the one rule that carries the most weight: the federal lead-based paint disclosure. Keep the agent's role in mind the whole way through. You disclose what you know and point people to the right expert. You do not diagnose, test, or remediate.

What are the environmental hazards tested on the Texas exam?

Snippet answer: The Texas exam focuses on six environmental hazards: lead-based paint, asbestos, radon, mold, wetlands, and flood risk. Lead paint and asbestos are age-related building materials. Radon and mold are conditions inside the home. Wetlands and flood risk are land and location issues. Each has a different regulator, and the agent's core duty is honest disclosure, not testing or repair.

Group the six hazards by type and they get easier to remember.

The pattern to carry into the exam: lead and asbestos are about the age of the materials, radon and mold are about conditions inside the home, and wetlands and flood are about the land and its location. Now take each one in turn.

Lead-based paint: the most-tested hazard

Snippet answer: Lead-based paint is the hazard most likely to appear on your exam because it carries a federal disclosure rule. Lead paint was banned for residential use in 1978. Any home built before 1978 is treated as possibly containing lead paint, which triggers a federal disclosure and pamphlet requirement on sale or lease. Lead is dangerous mainly to young children and pregnant women.

Lead was common in paint until the federal government banned it for consumer use in 1978. The danger is not a wall of intact paint. It is the dust and chips from peeling, sanding, or renovation, which young children can ingest. Lead exposure can cause brain and nervous-system damage in children.

Because of that risk, Congress passed the Residential Lead-Based Paint Hazard Reduction Act of 1992, often called Title X. It directs the EPA and HUD to require disclosure of known lead paint before the sale or lease of most housing built before 1978. This is the one environmental rule with a hard federal mandate behind it, so the full disclosure mechanics get their own guide, covered in lead-based paint disclosure.

For this overview, hold three facts. The line is 1978. The rule is federal, not a Texas invention. And the agent has a duty to make sure the disclosure happens, not to test the paint.

Asbestos: an age-related material hazard

Snippet answer: Asbestos is a fibrous mineral once used in insulation, floor tile, popcorn ceilings, and pipe wrap, mostly in buildings from before the 1980s. It is dangerous only when disturbed and the fibers become airborne, which can cause lung disease decades later. Undisturbed asbestos is often left in place. There is no single federal sale-disclosure form like lead paint, but agents still disclose what they know.

Asbestos was prized for fire resistance and insulation, so it turns up in older popcorn ceilings, vinyl floor tile, pipe and duct wrap, and roofing. The key concept for the exam is the word friable. Friable asbestos crumbles easily and can release fibers into the air. Intact, undisturbed asbestos is generally not an immediate hazard, which is why the common professional advice is to leave it alone rather than rip it out.

That has a practical consequence agents should understand. Disturbing asbestos during a remodel is often more dangerous than leaving it sealed in place. Removal is a job for trained, licensed abatement contractors, not the homeowner and not the agent. In Texas, asbestos work in public buildings is regulated under the Texas Department of State Health Services rules, and federal EPA rules also apply. On the exam, connect asbestos to older buildings, the friable concept, and the leave-it-or-abate-it-properly choice.

Radon: the invisible soil gas

Snippet answer: Radon is a naturally occurring radioactive gas from the breakdown of uranium in soil and rock. It seeps into homes from the ground and collects in lower levels. It is colorless and odorless, and long-term exposure is a leading cause of lung cancer. The EPA action level is 4.0 pCi/L. No federal or Texas law requires radon testing before a sale, but Texas §5.008 lists radon as a disclosable hazard.

Radon comes up from the soil, so it enters through foundation cracks, sumps, and crawl spaces, and it concentrates in basements and ground-floor rooms. You cannot see or smell it, which is why testing is the only way to know a level. The EPA sets an action level of 4.0 picocuries per liter, and above that it recommends a mitigation system, usually a vent pipe and fan that pulls the gas out from under the slab.

Texas is a useful special case worth knowing. The 1993 EPA radon-zone map placed most Texas counties in the lowest-risk category, so radon has historically drawn less attention here than in states like Colorado or Pennsylvania. Newer testing shows elevated readings in parts of Texas anyway, so the low-risk label is not a guarantee. No law forces a radon test before a Texas sale, but the Texas seller's disclosure notice under §5.008 does list radon among the conditions a seller must disclose if known.

Mold: the moisture problem Texas licenses

Snippet answer: Mold is a fungus that grows wherever moisture, warmth, and organic material meet, so it follows leaks, floods, and humidity. Some molds cause allergic and respiratory reactions. Texas is one of the few states that licenses mold work: under Occupations Code Chapter 1958, the TDLR licenses mold assessors and remediators. Jobs under 25 contiguous square feet are exempt from that licensing.

Mold needs water, so it tracks plumbing leaks, roof leaks, flood damage, and high indoor humidity. The exam does not expect toxicology. It expects you to know that mold is a moisture problem first, and that the fix is to remove the water source and then the mold.

Texas stands out because it actually regulates the industry. Under Texas Occupations Code Chapter 1958, the Texas Department of Licensing and Regulation licenses mold assessment consultants, technicians, and remediation contractors. Two rules are worth carrying into the exam. First, small jobs are exempt: remediation of an area under 25 contiguous square feet does not require a license. Second, there is a conflict-of-interest wall. The licensed party who assesses the mold cannot also be the party who remediates it on the same project, which keeps the inspector honest. Agents do not test or clear mold. They disclose what they know and refer clients to licensed professionals.

Wetlands: federally protected land

Snippet answer: Wetlands are land saturated by water often enough to support water-dependent vegetation, such as swamps, marshes, and bogs. They are protected under Section 404 of the federal Clean Water Act. Filling or dredging a wetland usually requires a permit from the US Army Corps of Engineers. For a buyer, a wetland on the land can sharply limit where and whether they can build.

Wetlands matter to real estate because they restrict development. Under Section 404 of the Clean Water Act, you generally cannot discharge dredged or fill material into a wetland without a permit, and the US Army Corps of Engineers runs that permit program alongside the EPA. The permit test favors avoidance: an applicant must show impacts were avoided where practical, minimized where not, and compensated for what remains.

For the exam, the takeaway is impact on use. A buyer who wants to build on rural or coastal land may find a wetland designation blocks or shrinks the buildable area, and getting a permit is slow and uncertain. This is a land-and-location hazard, not a building-material one. Connect it to how land-use controls limit what an owner can do with a parcel.

Flood risk: the Texas disclosure Texas expanded

Snippet answer: Flood risk is a property's exposure to flooding, mapped by FEMA into flood zones. Texas takes this seriously: a 2019 law expanded the §5.008 seller's disclosure to ask about 100-year and 500-year floodplains, past flooding, flood pools, reservoirs, and prior flood-insurance claims. Homes in a mapped high-risk zone with a federally backed loan generally must carry flood insurance.

Flooding is the location hazard most likely to affect a Texas deal, given the state's coast, its flash-flood history, and events like Hurricane Harvey. FEMA maps properties into flood zones, and homes in a high-risk Special Flood Hazard Area that carry a federally backed mortgage are generally required to have flood insurance through the National Flood Insurance Program.

Texas widened its seller disclosure after major flood events. Senate Bill 339, effective September 1, 2019, expanded the §5.008 notice. A seller now discloses whether the home sits in a 100-year or 500-year floodplain, whether it has flooded, whether it is in a flood pool or near a reservoir, whether it was ever repaired for flood damage, and whether the seller received flood-insurance proceeds. Standard homeowners insurance does not cover flood, a point buyers often miss. Flood risk is also tied to a property's water and drainage disclosures, so treat them as a related set.

What is the agent's actual duty with a hazard?

Snippet answer: An agent's duty is to disclose known material facts, not to test for, diagnose, or remediate hazards. If you know of a hazard, you must disclose it. You must not hide or misrepresent it. When a hazard is possible, you refer the client to a qualified inspector or licensed specialist. Overstepping into testing or repair creates liability you are not licensed to carry.

This is the theme that ties all six hazards together, and the exam tests it hard. Draw a clean line between three roles.

The trap answer on the exam usually asks you to do too much: to assure a buyer the house is safe, to declare the mold harmless, or to advise skipping an inspection. The correct answer is almost always the humble one. You disclose known facts, you avoid guessing, and you send the client to the right expert. A hazard you know about and conceal is misrepresentation. A hazard you honestly did not know about is generally not your liability, which is exactly why disclosure and referral protect you.

How to study environmental hazards for the exam

Snippet answer: Study environmental hazards by grouping the six into materials (lead, asbestos), interior conditions (radon, mold), and land or location (wetlands, flood). Memorize the hard facts: 1978 for lead, 4.0 pCi/L for radon, 25 square feet for the Texas mold exemption, Section 404 for wetlands, and 2019 for the expanded Texas flood disclosure. Then anchor everything to the agent's disclose-and-refer duty.

Do not try to become an environmental expert. The exam rewards a small set of anchors plus the right instinct about your role. Learn the one number or agency tied to each hazard, and drill the agent-duty question type until the humble answer feels automatic.

If you want the deeper cuts, three siblings finish this cluster: the lead-based paint disclosure mechanics, material facts and stigmatized property, and CERCLA and Superfund basics for the liability angle.

Frequently asked questions

Does a Texas agent have to test a home for environmental hazards? No. Testing and inspection are jobs for licensed specialists. Your duty is to disclose hazards you know about and to refer the client to a qualified inspector when a hazard is possible. Performing the test yourself steps outside your license and creates liability.

Which environmental hazard has an actual federal disclosure form? Lead-based paint. Under the federal Residential Lead-Based Paint Hazard Reduction Act, sellers and landlords of most housing built before 1978 must disclose known lead paint, give the EPA pamphlet, and offer a 10-day inspection window. The other hazards are disclosed through the Texas §5.008 notice or general material-fact duties, not a separate federal form.

Is radon a big concern in Texas? Texas was mapped mostly as low-risk on the 1993 EPA radon-zone map, so it draws less attention here than in some states. Newer testing still finds elevated readings in parts of Texas, and the §5.008 seller's disclosure lists radon. No law requires a radon test before a Texas sale, but a known problem must be disclosed.

Why does Texas license mold work when most states do not? Because of the volume of mold claims tied to the Texas climate and past flooding, the legislature created a licensing system under Occupations Code Chapter 1958. The TDLR now licenses mold assessors and remediators, exempts jobs under 25 contiguous square feet, and separates the party who assesses mold from the party who remediates it.

Practice questions

1. A buyer is under contract on a home built in 1972 and asks the listing agent whether there is lead paint. The agent has no test results. What is the agent's best response? A. Assure the buyer the paint is safe because the home looks well maintained B. Provide the required lead-based paint disclosure and pamphlet, and note the buyer's right to inspect C. Tell the buyer lead paint was banned, so a 1972 home cannot contain it D. Advise the buyer to skip a lead inspection to keep the deal on schedule

Answer: B. The home predates 1978, so the federal disclosure applies. The agent shares the required disclosure and pamphlet and preserves the inspection right. Assuring safety (A) and telling the buyer a pre-1978 home is clear (C) are false. Discouraging inspection (D) is improper.

2. During a showing, a buyer notices a crumbling, dust-shedding pipe wrap in an older home's basement and asks the agent about it. The material is most likely a concern because it may be: A. Radon, which is released by disturbed insulation B. Friable asbestos, which can release fibers when it deteriorates C. Mold, which only grows on pipe insulation D. Lead paint, which is common on pipe wrap

Answer: B. Crumbling, dust-shedding insulation in an older building points to friable asbestos, which is hazardous when it deteriorates and releases fibers. Radon is a soil gas (A), mold requires moisture and organic material (C), and pipe wrap is not a typical lead-paint surface (D).

3. A seller tells the agent the home was in a FEMA 100-year floodplain and flooded two years ago. Under current Texas law, this information: A. Is optional to disclose because flood zones change B. Must be disclosed on the §5.008 seller's disclosure notice C. Is only relevant if the buyer uses a federally backed loan D. Is covered automatically by the buyer's homeowners insurance

Answer: B. Since the 2019 expansion of §5.008, sellers must disclose floodplain status and prior flooding. Disclosure is not optional (A). The insurance requirement is a separate loan issue (C), and standard homeowners policies do not cover flood (D).

4. A homeowner wants to fill a marshy, water-saturated portion of a rural tract to expand a building pad. Before doing so, the owner most likely needs a permit from: A. The Texas Real Estate Commission B. The Texas Department of Licensing and Regulation C. The US Army Corps of Engineers under Section 404 of the Clean Water Act D. No agency, because private land is exempt

Answer: C. Filling a wetland generally requires a Section 404 permit administered by the US Army Corps of Engineers. TREC regulates licensees (A), TDLR handles trades like mold work (B), and private ownership does not exempt a federally protected wetland (D).

Sources and methodology

This guide was written from primary federal and Texas sources and reverified on July 21, 2026. Environmental science and remediation are specialist fields; this page teaches only the exam-level concepts and the agent's disclosure role.

• The 1978 lead-paint line, the pre-1978 disclosure trigger, the pamphlet requirement, and the 10-day inspection window come from the federal Residential Lead-Based Paint Hazard Reduction Act (Title X) and the EPA and HUD disclosure rule.
• The 4.0 pCi/L radon action level and the Texas radon-zone context come from EPA radon guidance and the EPA Map of Radon Zones for Texas.
• The Texas mold licensing framework, the 25-square-foot exemption, and the assessor-remediator separation come from Texas Occupations Code Chapter 1958 and TDLR rules.
• The wetlands permitting rule comes from Section 404 of the federal Clean Water Act as administered by the US Army Corps of Engineers and the EPA.
• The expanded Texas flood disclosure comes from Texas Property Code §5.008 as amended by Senate Bill 339 (2019).

Verify hazard-specific facts and any disclosure duty against the current primary sources before you rely on them in practice.

Official source links

• Texas Property Code §5.008, Seller's Disclosure of Property Condition
• Texas Occupations Code Chapter 1958, Mold Assessors and Remediators
• EPA, Real Estate Disclosures About Potential Lead Hazards
• EPA, Section 404 of the Clean Water Act
• EPA Map of Radon Zones
• TDLR, Mold Assessors and Remediators

This article is exam-prep education for the Texas real estate sales agent license. It is not legal, environmental, or health advice, and it does not create an agency relationship. Environmental hazards, disclosure duties, and remediation rules change and depend on the specific property and current law. Always confirm the primary TREC, EPA, HUD, TDLR, and statutory sources, and work under the supervision of your sponsoring broker before acting.