Pitt Study Suggests Nonchemical Water Treatments Touted As “Green” Fail to Prevent Bacterial Growth in Air-Cooling Systems Found in Hospitals, Large Buildings by SPL2020 | Dec 10, 2010 | News Five devices pitched as alternatives to chemical water treatment for water-based air-conditioning systems allowed the same rate of bacterial growth as untreated water, Pitt researchers found in two-year study. Read more (link to NCD) Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ This site uses Akismet to reduce spam. Learn how your comment data is processed.