- What This Cheat Sheet Covers (and What It Doesn't)
- Exam Format at a Glance
- Fees, Retests, and Renewal Costs
- Eligibility and Application Quirks
- The Six Knowledge Domains: One-Line Summaries
- The Seven Reference Texts
- Exam-Day Logistics and Source Discrepancies
- After the Exam: Certification and Renewal
- CEAT vs. CEAI vs. CEAC
- A Domain-Ordered Review Sequence
- Frequently Asked Questions
- The exam is 50 multiple-choice questions, two hours, closed-book, with a 70% passing score set by the Modified Angoff method.
- Combined fee is $400 for US/Canadian applicants and $425 elsewhere; retests cost $100 and two-year renewal costs $300.
- ACAC publishes six unweighted domains and no percentage allocations, so study all six rather than gambling on one.
- Renewal needs 10 RCs for field activity plus 30 hours of professional development, with records kept for audit.
What This Cheat Sheet Covers (and What It Doesn't)
This page is a one-screen review of the facts that matter for the Council-certified Environmental Allergen Technician (CEAT), a vocational credential awarded by the CEAT Certification Board of the American Council for Accredited Certification (ACAC). The acronym is shared by several unrelated credentials in other industries, and none of their details apply here. Everything below comes from ACAC's CEAT-specific materials.
If you're still orienting yourself, start with What Is CEAT? or What Does CEAT Stand For?, then return here. For deeper study planning, pair this sheet with the CEAT Study Guide, and when you're ready to test yourself, try the CEAT practice tests.
Exam Format at a Glance
| Element | CEAT Detail |
|---|---|
| Question count | 50 multiple-choice questions |
| Answer options | At least four per question |
| Time limit | Two hours |
| Book policy | Closed-book |
| Passing score | 70%, set using the Modified Angoff method |
| Randomization | Questions and answer choices are randomized |
| Results | Available electronically, immediately |
| Testing provider | Kryterion, Inc., with scheduling through ACAC |
| Delivery options | Authorized testing center, secure online video proctoring, or instructor-proctored vocational delivery by prior arrangement |
What the numbers mean in practice
Fifty questions in two hours works out to a comfortable pace of roughly two and a half minutes per item, so this is not a speed test. At a 70% threshold, you need 35 correct answers out of 50. Because questions and answer choices are randomized, memorizing the position of an answer or the order of a practice set will not help; you need to know the content. For more on how the cut score is derived, see CEAT Passing Score: Exactly What You Need to Pass.
Fees, Retests, and Renewal Costs
| Item | Amount |
|---|---|
| Combined exam + certification fee (US/Canada) | $400 |
| Combined exam + certification fee (elsewhere) | $425 |
| Domestic breakdown: examination fee | $100 |
| Domestic breakdown: vocational certification fee | $300 |
| Retest | $100 |
| Two-year vocational renewal | $300 |
These figures come from the live Official CEAT Application. No preparation course is mandatory, and ACAC is independent of preparation-course providers, so study materials are an optional extra on top of these costs. A full budget picture, including optional study spending, is in CEAT Certification Cost: Complete Pricing Breakdown.
Eligibility and Application Quirks
Core eligibility
- Current employment in environmental allergen investigations or consulting.
- Legal work eligibility.
- Attestation through a signed affidavit and required email verification.
For a fuller walkthrough, see CEAT Requirements: Eligibility, Prerequisites & How to Qualify.
Conflicting instructions you should know about
ACAC's current application page and the older handbook do not fully agree. Rather than guess which wins, confirm the current instructions directly with ACAC before you submit.
| Topic | Current application page | Handbook |
|---|---|---|
| Time to finish application and exam | Six months | 90 days |
| Project sheets | CEAT explicitly exempt | Retains project-sheet language |
| Notarization, diploma/transcript | Not emphasized | Generic notarization and diploma/transcript language retained |
After you pass, the certification board reviews your file and certification requires unanimous approval. Passing the exam is therefore necessary but not the final step. Also note that passing an examination for state licensing alone does not authorize use of the CEAT designation.
The Six Knowledge Domains: One-Line Summaries
ACAC publishes six official, unweighted knowledge domains. There are no official percentage allocations, so any site claiming exact domain weights is guessing. For the long version, read CEAT Exam Domains: Complete Guide to All 6 Content Areas.
Domain 1: The allergic response in humans
The biology behind why exposure leads to symptoms.
- How sensitization and allergic reactions develop
- The link between exposure and respiratory outcomes such as asthma
- Why individual susceptibility varies between occupants
Domain 2: Types of allergens and their presence in the built environment
What the allergens are and where they accumulate indoors.
- Common indoor allergen categories and their typical sources
- Where allergens settle: dust reservoirs, soft furnishings, floors
- How building conditions influence allergen presence
Domain 3: Principles of the Built Environment
How buildings behave, because allergen problems are often building problems.
- Ventilation, moisture, and air movement concepts
- How construction and occupant habits shape indoor conditions
- Healthy-housing principles from the CDC and HUD references
Domain 4: Investigation principles, procedures, and equipment
How a technician actually gathers evidence.
- Aeroallergen sampling methods and their limitations
- Vacuum dust sample collection protocol for allergens
- Laboratory considerations for indoor air testing
Domain 5: Allergen evaluation and remediation strategies
Turning findings into decisions and corrective action.
- Interpreting sampling results in context
- Selecting and sequencing remediation approaches
- Exposure assessment concepts from the EPA handbook chapter
Domain 6: Guidelines, regulations, and standards
The framework a technician works within.
- Which guidance documents apply and what authority they carry
- The difference between a guideline, a standard, and a regulation
- Professional limits of practice for a technician
A note on spelling: the handbook contains editorial carryovers from the sibling CEAI and CEAC credentials, but the shared study packet explicitly confirms the content applies to the CEAT, and the domain names above use the corrected spelling.
The Seven Reference Texts
The study packet supplies seven reference texts. The dates below are publication dates, not exam-version identifiers; neither the handbook nor the packet publishes a version identifier.
- APHL, Environmental Laboratories and Indoor Air Testing: A Primer (2015)
- CDC, Healthy Housing Reference Manual, chapter 5 (2006)
- EPA, Exposure Factors Handbook, chapter 19 (updated 2018)
- Levetin, Methods for Aeroallergen Sampling (2004)
- HHS, Airborne Allergens: Something in the Air (2003)
- HUD, Healthy Homes Issues: Asthma (2012)
- HUD, Vacuum Dust Sample Collection Protocol for Allergens (2008)
Key Takeaway
Map each reference to the domains it feeds. The Levetin text and HUD vacuum protocol anchor Domain 4, the APHL primer supports laboratory questions, the CDC and HUD housing documents feed Domains 2 and 3, and the EPA chapter supports exposure reasoning in Domain 5. Read complete documents, not just highlighted pages.
Exam-Day Logistics and Source Discrepancies
- Arrival time: The CEAT handbook asks you to arrive 30 minutes early, while the generic ACAC page says 15 minutes. Follow the longer window, since an early arrival costs nothing and a late one can cost you the attempt.
- Delivery mode: Choose among a testing center, secure online video proctoring, or instructor-proctored vocational delivery arranged in advance. Online proctoring means your room and equipment need to meet the proctor's rules before you begin.
- Closed-book: Plan for no reference materials during the exam.
- Immediate results: You will see your outcome electronically as soon as you finish, though certification itself follows board review.
Scheduling windows and deadlines are covered in CEAT Exam Dates: Testing Windows, Deadlines & Scheduling.
After the Exam: Certification and Renewal
Certification lasts two years. Renewal costs $300 and requires a renewal attestation and payment, along with documentation of your credits. The numbers are another place where ACAC's sources differ:
| Source | Renewal requirement |
|---|---|
| Handbook | 40 Recertification Credits (RCs) |
| Current Recertification Procedures | 10 RCs for continued field activity plus 30 hours of professional development during the term |
Both add up to the same 40 total, but the current procedures break it into two buckets, so track them separately from day one. Keep records of everything, because they may be audited. A tidy log of field work and training dates will save you a scramble at renewal time.
CEAT vs. CEAI vs. CEAC
ACAC's environmental allergen family includes sibling credentials that share a study packet, which is why the handbook has carryover text. The CEAT is the technician-level credential, and the packet explicitly confirms its applicability. Do not assume fees, question counts, or requirements from a sibling apply to the CEAT; use the CEAT-specific handbook and application. If you're weighing whether the credential suits your career, see Is the CEAT Certification Worth It? and CEAT Jobs for the kinds of roles in allergen investigation and consulting that this credential is built around.
A Domain-Ordered Review Sequence
Because the domains build on each other, a sensible order moves from biology to buildings to field methods to decisions. This is a suggested sequence, not an official one.
Domains 1 and 2
- Read the HHS and HUD asthma documents for the allergic response
- List each allergen type and where it accumulates indoors
Domain 3
- Work through the CDC Healthy Housing chapter
- Connect moisture and ventilation to allergen presence
Domain 4
- Study the Levetin sampling methods and the HUD vacuum protocol step by step
- Review the APHL primer for laboratory handling
Domains 5 and 6, then review
- Practice interpreting results and choosing remediation steps
- Sort guidance by authority; take timed practice sets at the practice test site
Difficulty is subjective and depends heavily on your field experience; see How Hard Is the CEAT Exam? for a balanced view, and note that no verified pass rate is published (details in CEAT Pass Rate: What the Data Shows).
Frequently Asked Questions
The exam has 50 multiple-choice questions with at least four answer options each, delivered closed-book over two hours. The passing score is 70%, set using the Modified Angoff method, which means 35 correct answers.
The combined examination and certification fee is $400 for US/Canadian applicants and $425 elsewhere. The domestic total is a $100 examination fee plus a $300 vocational certification fee. A retest is $100, and two-year renewal is $300.
No. ACAC publishes the six domains as unweighted knowledge areas and does not provide percentage allocations. Prepare for all six rather than concentrating on one.
No. No preparation course is mandatory, and ACAC is independent of preparation-course providers. Candidates are directed to study the complete reference publications in the study packet.
Certification lasts two years. To renew, you submit an attestation and the $300 fee, backed by records of your recertification credits. Current procedures specify 10 RCs for continued field activity plus 30 hours of professional development, while the older handbook cites 40 RCs in total.