- How the Four Domains Fit the Exam
- Domain 1: Infectious Diseases and Transmission
- Domain 2: Construction, Demolition and Renovation
- Domain 3: Infection Control Project Management
- Domain 4: Effective Infection Control Practices
- Reference Editions and the ASHRAE 170 Discrepancy
- Question Style, Format and Scoring
- Eligibility, Fees and Application Mechanics
- Sequencing the Domains in a Study Plan
- Who Uses This Credential
- Frequently Asked Questions
- The CEICC from ACAC is built around four unweighted competency areas drawn from the handbook's Required Skills.
- The exam has 120 multiple-choice questions in three hours, closed book, with a 75% passing threshold.
- Domain 2 (construction, demolition and renovation) is where project-based infection control judgment is most heavily tested in practice.
- The handbook lists ASHRAE 170-2008 but the 2020 study guide omits it; study both lists.
How the Four Domains Fit the Exam
The Council-certified Environmental Infection Control Consultant (CEICC) credential is issued by the American Council for Accredited Certification (ACAC), with testing delivered through Kryterion. Unlike many exams that publish a neat blueprint with percentage weights, the CEICC materials present four competency headings under the handbook's Required Skills section. The optional study guide corroborates those same four headings.
That distinction matters for how you prepare. The four domains are unweighted in the source materials, and they do not establish exhaustive exam coverage. In other words, you should treat them as the backbone of your preparation, not as a guarantee that nothing else can appear. Anyone who tells you a specific domain is "30% of the exam" is inventing a number the published materials do not support.
The four domains, using the exact names from the handbook, are:
- Infectious Diseases and Their Modes of Transmission in the Healthcare Setting
- Principles of Infection Control During Construction, Demolition and Renovation
- Infection Control Project Management
- Effective Infection Control Practices
If you are still deciding whether to pursue the credential, start with What Is CEICC Certification? and the overview of CEICC requirements and eligibility. This guide assumes you have decided to sit the exam and want to understand what each content area demands.
Domain 1: Infectious Diseases and Their Modes of Transmission in the Healthcare Setting
This is the foundation domain. A consultant who cannot reason about how organisms move through a healthcare facility cannot design barriers, specify ventilation controls, or judge the risk of a given construction activity. The exam expects you to connect pathogen behavior to environmental conditions, not simply recite definitions.
Domain 1: What Candidates Must Understand
Expect questions that link a transmission route to a facility condition or control measure.
- Modes of transmission: contact, droplet, airborne, and common-vehicle routes, and how each is interrupted
- Environmental reservoirs: water systems, air handling, surfaces, dust, and soil
- Pathogens of particular concern in construction contexts, including fungal spores such as Aspergillus and waterborne organisms such as Legionella
- Patient populations with elevated susceptibility, such as immunocompromised patients, and why their risk is different
- Standard precautions versus transmission-based precautions as the framing for facility-level decisions
Where the CDC guideline anchors this domain
The reference list in the CERT FACTS for this credential includes the CDC environmental infection control guideline (2003, updated 2019). This is the single most important document for Domain 1 and, frankly, for much of the rest of the exam. Read it as a working document, not as background. Pay particular attention to how it organizes environmental infection control: air, water, environmental services, and the special case of construction and renovation.
Common mistakes in this domain
- Memorizing organisms without mechanisms. The exam rewards knowing why a hospital water system or a disturbed ceiling plenum becomes a transmission pathway.
- Confusing precaution categories. Know which transmission route drives which control.
- Ignoring susceptible hosts. A condition that is trivial for a healthy visitor can be serious for a transplant patient.
Domain 2: Principles of Infection Control During Construction, Demolition and Renovation
This is the domain that most clearly separates the CEICC from general infection prevention credentials. It covers what happens when contractors open walls, demolish structures, and renovate occupied or adjacent healthcare space. The central question is always the same: how do you keep dust, moisture, and the organisms they carry away from vulnerable patients?
Domain 2: What Candidates Must Understand
Think in terms of source, pathway, and receptor for every construction activity.
- Pre-construction risk assessment: classifying the type of work and the patient risk group affected
- Physical barriers, negative air pressure containment, and sealing of penetrations
- Control of dust at the source, including wet methods, HEPA-filtered equipment, and cleaning protocols
- Traffic control: routes for workers, debris, and materials through or around occupied areas
- Air handling system management, including protecting intake, return, and filtration during work
- Water system management during renovation, including flushing and the risk of stagnation
- Post-construction cleaning, verification, and release of the area back to patient use
Why ASHRAE 170 shows up here
Ventilation design for healthcare facilities is a recurring theme in this domain. The handbook's reference list includes ASHRAE 170-2008, while the linked 2020 study guide omits it. That is a real discrepancy in the source materials, and the sensible response is to preserve it in your preparation: treat ASHRAE 170 as a reference you should know at the conceptual level (air change rates, pressure relationships, filtration expectations for different space types), even though the study guide does not walk you through it. See the dedicated section below for how to handle this.
Key Takeaway
For every construction scenario, practice answering three questions in order: what is the work, who is the most vulnerable patient nearby, and which controls break the path between them? Most Domain 2 reasoning follows that chain.
Domain 3: Infection Control Project Management
This domain reflects the consulting side of the credential. Knowing the controls is not enough; a CEICC must also plan, coordinate, document, and verify them across a project that involves owners, architects, contractors, facilities staff, and clinicians. The application process itself mirrors this emphasis: candidates must submit four distinct project sheets with verification, which tells you the credential expects demonstrated project experience, not just book knowledge.
Domain 3: What Candidates Must Understand
Expect scenario questions about process, roles, and documentation.
- Integrating infection control into project planning from design through closeout
- Defining roles and communication paths among the project team and the facility
- Developing and enforcing an infection control plan and permit or authorization process
- Monitoring and inspecting controls during the work, and responding when they fail
- Documentation: records of risk assessments, inspections, corrective actions, and sign-off
- Recognizing when a project must pause, escalate, or change scope because of an infection risk
Ethics and professional conduct
The reference list for this credential includes the ACAC Code of Conduct. Because certification requires unanimous board approval and is subject to documented verification, professional conduct is not a side issue. Be prepared to apply the Code of Conduct to realistic dilemmas, such as pressure from a schedule-driven owner to relax a control, or a conflict between a contractor's convenience and a patient safety requirement.
Domain 4: Effective Infection Control Practices
The fourth domain gathers the day-to-day practices and worker-protection measures that run through every project and facility. It overlaps with the others by design, and it is where regulatory references such as bloodborne pathogen rules and respiratory protection selection appear.
Domain 4: What Candidates Must Understand
Focus on practices that protect both patients and the workers who enter their environment.
- Hand hygiene, personal protective equipment, and appropriate use in a project or clinical setting
- Bloodborne pathogen exposure control, anchored in OSHA 29 CFR 1910.1030
- Respiratory protection: matching the hazard to the respirator, anchored in the NIOSH Respirator Selection Logic (2004)
- Environmental cleaning and disinfection principles and product use
- Waste handling and sharps safety
- Education and training of workers who are not clinicians but enter healthcare space
A useful way to think about Domain 4: where Domain 2 asks "how do we contain the work," Domain 4 asks "how do the people doing the work, and the people near it, stay safe and keep the environment clean." Questions can blend the two, so avoid studying them in isolation.
Reference Editions and the ASHRAE 170 Discrepancy
The CEICC materials name specific reference editions, and edition awareness is part of passing. The table below lists the references in the CERT FACTS and the practical note for each.
| Reference | Edition Listed | Primary Domains Served | Preparation Note |
|---|---|---|---|
| CDC environmental infection control guideline | 2003, updated 2019 | 1, 2, 4 | Core document; read the construction and renovation sections closely |
| OSHA 29 CFR 1910.1030 | Bloodborne pathogens standard | 4 | Know exposure control concepts and employer obligations |
| NIOSH Respirator Selection Logic | 2004 | 4 | Practice matching hazard to respirator type |
| ACAC Code of Conduct | Current ACAC document | 3 | Apply to professional-judgment scenarios |
| ASHRAE 170 | 2008 (handbook only) | 2 | Listed in the handbook but omitted from the 2020 study guide |
Question Style, Format and Scoring
Knowing the format removes a layer of uncertainty. The exam is 120 multiple-choice questions, each with at least four answer choices, and you have three hours. It is closed book. The passing threshold is 75%, set using a Modified Angoff process, which is a standard-setting method in which subject-matter experts judge how a minimally competent candidate would perform on each item.
You can take the exam at a computer-based test center or through secure online video proctoring, and results are available immediately. For a deeper look at how the threshold works, see CEICC Passing Score 2026: Exactly What You Need to Pass. For scheduling logistics, see CEICC Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
What the question style tends to reward
- Scenario judgment. Because the credential is for consultants, expect situations that ask for the best next action, not a recalled definition.
- Distractors that are partly right. With at least four choices per item, wrong answers are often plausible controls applied at the wrong stage or for the wrong risk group.
- Cross-domain items. A single question may require transmission knowledge (Domain 1), a containment principle (Domain 2), and a process step (Domain 3).
For realistic item practice that mirrors this style, use the CEICC practice tests and review rationales for every miss, not just the score.
Key Takeaway
With 120 questions in three hours, you have roughly 90 seconds per question. Closed-book pacing means you must recall the CDC guideline's logic from memory, so build recall through practice questions rather than rereading.
Eligibility, Fees and Application Mechanics
The domains only matter if you can sit the exam, so a quick orientation to eligibility and cost is worthwhile. Full detail is in CEICC Requirements 2026: Eligibility, Prerequisites & How to Qualify and CEICC Certification Cost 2026: Complete Pricing Breakdown.
| Education Background | Qualifying Coursework | Documented Field Experience |
|---|---|---|
| Relevant four-year degree | Or equivalent 30 qualifying semester credits | Four years |
| Relevant two-year degree | Or equivalent 15 qualifying credits | Six years |
| High-school diploma or GED | None specified | Eight years |
- Project sheets: Four distinct project sheets and verification are required.
- Training: There is no mandatory training course. See CEICC training for preparation options.
- Approval: The award requires unanimous board approval.
- Fees: $100 examination plus $400 certification, for a $500 initial total. A retake costs $100 and renewal costs $400.
- Deadline discrepancy: The current application page allows six months to complete the process, while the handbook says 90 days. Confirm the applicable deadline with ACAC before you begin.
Validity and renewal
The credential is valid for two years. Renewal requires 40 RCs, comprising 10 for continued field activity and 30 hours of professional development, with records subject to audit. The CEICC credential page instead describes 20 professional-development hours annually, so confirm this discrepancy with ACAC when planning renewal.
Sequencing the Domains in a Study Plan
Because the domains are unweighted, sequence them by dependency rather than by assumed importance. Domain 1 supplies the vocabulary and risk logic that Domains 2 and 4 depend on, and Domain 3 is easiest to absorb after you understand the controls it coordinates. A broader plan is in the CEICC study guide; the timeline below shows one way to order the content areas specifically.
Domain 1: Transmission and Environmental Reservoirs
- Read the CDC guideline sections on air and water
- Map each transmission route to its control
- Take a short diagnostic set of practice questions
Domain 2: Construction, Demolition and Renovation
- Work the CDC construction and renovation material in depth
- Study containment, pressure relationships, and traffic control
- Review ventilation concepts, including ASHRAE 170 where available
Domain 3: Project Management
- Draft an infection control plan outline for a sample renovation
- Review the ACAC Code of Conduct against dilemma scenarios
Domain 4: Practices and Worker Protection
- Review OSHA 29 CFR 1910.1030 and NIOSH Respirator Selection Logic
- Practice respirator and PPE selection scenarios
Integration
- Timed 120-question practice sessions in a three-hour block
- Re-study the domains where your misses cluster
Adjust the length to your experience. A candidate who has managed healthcare renovation projects may compress Domains 2 and 3, while a clinician new to construction should spend longer on Domain 2. For a one-page recap near exam day, see the CEICC cheat sheet.
Who Uses This Credential
The domains point to the audience. People who benefit from the CEICC tend to work where construction and healthcare intersect: infection prevention and facilities professionals in hospitals, consultants who advise on renovation projects, contractors who work in healthcare settings, and safety or industrial hygiene professionals involved in project oversight. The credential signals that you can assess risk, specify controls, and document a project, not only perform clinical infection prevention.
For role-specific detail, see CEICC jobs, and for earnings context see the CEICC salary guide. If you are weighing the investment, Is the CEICC Certification Worth It? covers the tradeoffs.
Frequently Asked Questions
The handbook's Required Skills section lists four competency areas: infectious diseases and transmission, infection control during construction, demolition and renovation, infection control project management, and effective infection control practices. They are unweighted and do not establish exhaustive exam coverage.
No weights are published in the materials. Prepare across all four areas rather than assuming one dominates. Any percentage breakdown you see elsewhere is not supported by the ACAC handbook or study guide.
The exam has 120 multiple-choice questions with at least four answer choices, three hours, closed book. The passing threshold is 75%, set using Modified Angoff. You can test at a center or via secure online video proctoring, and results are immediate.
Yes, at least at the conceptual level. The handbook lists ASHRAE 170-2008 while the 2020 study guide does not. Preparing for the broader list is the safer choice when the two ACAC documents disagree.
The initial total is $500: a $100 examination fee plus a $400 certification fee. A retake costs $100 and renewal costs $400. Confirm current fees with ACAC before applying.
Mastering these four domains means thinking like a consultant: understand how organisms move, contain the work that disturbs the environment, manage the project that carries it out, and protect everyone involved. When you are ready to test that thinking under exam conditions, start with the full CEICC practice exam and revisit this guide wherever your results show a gap. For orientation on the credential itself, you can also read CEICC certification and What Is CEICC?.