Center for Environmental Research and Technology Inc.

  • Unparalleled Customer Service
  • Ongoing Technical Support
  • Over 50,000 Courses Taken
  • Serving Students Since 1986

Over 50,000 Course Enrollments - and going strong!

The Center for Environmental Research and Technology Inc. is the leading educational resource for radon measurement, mitigation, and CE courses nationwide. CERTI was established in 1986 to fill the need for better, more convenient education for professionals, and has been in the forefront of radon education ever since. CERTI understands that all students learn differently. From our entry level courses to our continuing education courses, CERTI includes a variety of audio, visual, and live-taught course recordings to optimize the student experience and increase comprehension. Relevant content and industry-driven information is taught by Doug Kladder, lead instructor and founder of the Center for Environmental Research and Technology Inc. CERTI has also regularly collaborated with many industry experts to ensure the classes are effective and pertinent.

Our Valued Students

A Sample of the many excellent reviews and ratings from our valued students.

  • Excellent!!

"Well paced course and good visual aides to help understand the information being presented."

Sue Student

  • Excellent!!

"Very Informative. I've been doing Radon testing for 20 plus years and thought I knew everything about Radon. I was wrong and I actually knew very little about Radon."

Roger Student

  • Excellent!!

"The only place I will ever go for additional training is CERTI. It's been six years and all of my courses and information are still in my same portal so that I can access and refresh myself whenever needed. As good as it gets."

James Student

  • Excellent!

"I took this course to fulfill my continuing education credits and I'm glad I did.  There is simply so much information to remember and this course covers ALL of it!  I cannot say enough about the professionalism, completeness, and methodology of quizzes (which explain the answers gotten wrong so that you can learn from them!)" 

Alan Student

  • Excellent!!

"This was an excellent course.  I went thru a different education provider during the initial licensing agreement but wish I would have known about this course then.  The level of content, supplemental resources, and the ability to go at my own pace was invaluable." 

Mike Student

  • Excellent!

“This was a great course. I appreciate the home page and that we can utilize this information even after completion. I really like the online course and the flexibility to complete the course. That works very well with my schedule.”

Louis Student

Exam Prep Courses now available to help prepare YOU for the NRPP or NRSB Measurement and Mitigation Exams!

From the Blog

Here are some resources that can help with your Radon business or training.

Radon Health Effects: Are We Moving Away From Science?

We recently received a solicitation to review a

Where Can I Put My U-Tube?

Everyone in the radon biz has seen countless

How Do I Price a Large Building or Multi-Family Radon

At CERTI, we are frequently called on for