NADA header

The textbook for our NADA course is written by the instructor:
Helsel, D.R. (2012) Statistics for censored environmental data using Minitab and R (2nd edition). Wiley.
The previous edition had the title Nondetects And Data Analysis. The second edition includes new material on using R statistical software, a new chapter on multivariate methods for nondetects, and other additions.

Reviews of the First Edition:
"Sound methods......a practical guide" SETAC Globe, March 2005

"I would recommend this book for anyone conducting or reviewing the analysis and reporting of environmental data..." Technometrics, February 2006

"..clear explanations...good instructions...solid advice...This is the book I will share with consulting clients who have data with below detection limit values." Journal of the American Statistical Association, March 2006

...a 'must-have' desk reference for environmental practitioners dealing with censored datasets." Vadose Zone Journal, February 2006

And the reviews on Amazon:
"This book should be owned, and read, by anyone and everyone who ever has to deal with environmental monitoring data."
-- Tim Bray

Excellent Resource" -- Jill Lundell

Sensible advice...I recently incorporated many of the concepts from this book into regulatory requirements for coastal water quality standards" -- Steve Saiz

This book fills a huge gap by providing proper statistical methods from the fields of medical and industrial research to the analysis of censored environmental data. ... I have found the information to be extremely helpful in my work as an in-house environmental consultant working for a large manufacturing company." -- Saul Furstein