May 2008, Vol. 20, No.5


Green Costs Less

Robert S. Ruppert

Regarding your article (“Green, But at What Cost?,” March), I have been averaging 55.67 mi/gal over 78,832 mi [in my Prius]. This relates to an average cost of $0.39/mi, including the $26,000 to purchase the car and maintenance items. I still pay less per tank fill-up than I did with my Jeep, even with the gas being $1/gal more. I know that I am getting more than twice the mileage that I used to get with the Jeep — about 23 mi/gal. If I were still driving the Jeep, I would have used about 3427 gal, versus the 1416 gal [I have used with] the Prius in 27 months — 2011 gal less. 

I know that I work at getting the best mileage, but it really is not that hard.

What Do You Think?

WE&T welcomes your observations on topics that are covered in the magazine or are otherwise relevant to the wastewater treatment industry. Letters that are chosen for publication may be edited for factual accuracy, clarity, style, and length.

Please send your letters intended for publication via e-mail to, or mail to Melissa H. Jackson, WE&T, c/o Water Environment Federation, 601 Wythe Street, Alexandria, VA 22314-1994 USA. Please include your full name, professional title, organization name, daytime phone number, and city, state, and country of residence

Robert S. Ruppert CME Associates Parlin, N.J.