The price of diesel exhaust fluid dropped in July to the lowest price recorded by DEF Tracker since its October 2011 launch.

DEF Tracker is an independent monthly DEF price reference for the North American market published by Integer Research, a London-based research service firm that analyzes global commodity markets.

The average U.S. price of DEF at the pump fell 28 cents to $2.70 per gallon between June and July after four straight months of rising prices. Christopher Goodfellow of Integer stated the decrease is a reflection of falling raw material costs, due to the price of urea softening in June.

Goodfellow said Love’s Travel Stops sold DEF at the pump for $2.39 per gallon at its 150 available sites during July. As of Aug. 6, the Love’s website shows it sells bulk DEF at 154 of its 290 locations.

Travel Centers of America recently installed its 100th location with bulk DEF dispensers, according to Tom Liutkus of TA. Each dispenser is complete with the 1+1 transaction system, which pumps diesel fuel and DEF at the same time. The company plans to offer DEF at the pump at all its Travel Centers and Petro Stopping Centers locations by the end of 2012.

North of the border, the DEF price remains at 79 cents Canadian per liter ($2.99 per gallon U.S.) at the six Pilot Flying J locations nationwide offering DEF at the pump, reported Goodfellow. Stateside, Pilot offers pump DEF at 312 locations as of Aug. 6, according to its website.