Header Artwork
Header Artwork



Disinfectant Efficacy Testing Study Design and Data Interpretation for the U.S. Environmental Protection Agency

Published Date: May 5, 2022

When developing a disinfectant or sanitizer (herein referred to as disinfectant) for use on environmental surfaces, the sponsor must first develop and support a label claim based upon guidelines set forth by the United States Environmental Protection Agency (EPA). In order to substantiate the claim the sponsor is planning to make on their label, they must perform one or more evaluations as dictated by the EPA.

The goal of this webinar is to provide a general overview of disinfectant-efficacy testing and to provide a detailed methodology to assist in designing studies for submission to the EPA that accurately represent facility procedures and to ensure that OCSPP guidance is followed.

This webinar covers testing methodologies and strategies as well as test method acceptance criteria and interpretation of results from disinfectant-efficacy studies. One specific aim of the webinar is to provide insight into how the results of a disinfectant-efficacy evaluation for the sponsor’s submission to the EPA will be gathered, interpreted, and best presented for the submission.

Takeaway highlights:

  • Study design: How to choose parameters that are representative of your facility while meeting regulatory expectations.
  • Differences between quantitative and qualitative data for submission.
  • Interpretation of results: Translating data into useful information on the efficacy of the disinfectant.

Learn about the presenters below.


Grady Wertman

Study Director

Grady has worked at BioScience Laboratories for 8 years. He started in December 2013 as a laboratory technician without any lab experience, but since that time he has become a study director (Study Director III once integrated into Nelson Laboratories). He has made it his goal to learn and deeply understand any and all methods utilized. Grady holds undergraduate degrees in Cellular Biology/Neuroscience and Microbiology from the Montana State University – Bozeman. In his free time, he enjoys spending time with his family and cooking anything on his Traeger, while enjoying the requisite beverage(s), of course.


Thalia Contreras

Study Director

Thalia has worked for Nelson Laboratories for 2 years. She started in November 2019 as a laboratory analyst within the product sterility department. Through her eagerness and ability to learn quickly, she transitioned into a study director position in May 2021. This position has allowed her to work and expand her knowledge base within microbiology, chemistry, and molecular testing of pharmaceutical and medical products. Thalia holds an undergraduate degree in biological sciences from Rutgers University with minors in nutrition and Africana studies. In her free time, she enjoys volunteering and supporting local charities, particularly those that aim to emphasize the voices of women, especially Latina women, and also women in STEM.

Complete the form below to access the webinar.