Thank you for your feedback on the City's website. We maintain a directory of of all city officials on our website at: http://bloomington.in.gov/directory Specifically, the mayor's email address is mayor@bloomington.in.gov. The NSF has a comprehensive guide about water filtration on their website: http://www.nsf.org/consumer-resources/what-is-nsf-certification/water-filters-treatment-certification/selecting-a-water-treatment-system/ You can find more information about our City's water utility here: http://bloomington.in.gov/sections/viewSection.php?section_id=131 Additionally, the utility customer service staff are available to help answer other questions via phone: 812-349-3930 or email: utilities.cs@bloomington.in.gov We will certainly work toward making this information easier to find on our website. Thanks again for your feedback.