ATLANTA – Coffee roaster Volcanica is introducing a low acid coffee collection. The methods used to roast, extract and brew coffee can affect its acidity. Low acid coffees have a pH of 5.6 to 5.2 while the average pH of coffee is around 5.The coffees feature beans from Brazil, Sumatra and other Arabica coffees grown at lower altitudes. They are available in regular and decaf. Varieties in the collection include low acid coffee, Sumatra mandheling reserve, Volcanica house blend, Costa Rica reserve and Brazil estate. The coffees are available direct-to-consumer at volcanicacoffee.com.