Sanitarian Written Exam Study Guide Part 1 – 2025/2026 | 120+ Verified Q&A on Water Safety, Infectious Disease, Food Sanitation, Waste Disposal | Public Health & Environmental Science

This in-depth exam study guide includes 120+ professionally verified questions and answers, specifically prepared for the 2025/2026 Sanitarian Written Exam. It targets candidates preparing for Registered Sanitarian (RS) or Registered Environmental Health Specialist (REHS) exams at both state and national levels, including those administered by boards like NEHA or state departments of health. The content is structured in a Q&A format covering major public and environmental health topics essential for a certified sanitarian, including: Infectious diseases and their transmission (e.g., trichinosis, hepatitis, staphylococcus, Q fever) Food safety protocols, pathogens, and disinfection techniques Water quality control, coliform testing, chlorine dosing, and contamination prevention Milk and dairy safety, pasteurization, and nutrient evaluation Sewage treatment systems, grease trap management, oxidation ponds, and septic tank operation Hazardous and infectious waste management, including hospital procedures Vector control and pest prevention, focusing on rodents, insects, and public sanitation Environmental law, with emphasis on the Sanitary Code of Louisiana, DEQ regulations, and IRP-based standards Hospital and school sanitation practices, morgue standards, air disinfection, lighting, and attire compliance Emergency preparedness, public health risk mitigation, and disease surveillance This document is highly relevant for: Environmental Health students in universities or community colleges Public Health majors, especially those pursuing licensing or certification RS and REHS exam candidates across U.S. states Health department trainees, inspectors, and sanitarian interns Educators and trainers in the field of public health or environmental sanitation It also provides practical insight into technical calculations (e.g., chlorine dosing, food temperatures), disease incubation periods, inspection protocols, and legal frameworks, making it a complete resource for both study and instruction. Keywords: registered sanitarian, REHS, environmental health, infectious disease, food safety, water treatment, septic system, hazardous waste, public health, chlorine residual, milk sanitation, pest control, coliform testing, DEQ, oxidation pond, air disinfection, sanitary code, epidemiology, morgue standards, vector control