Sparkling wine made in the traditional champagne (indicating the year of harvest) and stamped with the VEQPRD (Vinho Espumante de Qualidade Produzido em Região Determinada) certification. VFQPRD is a regional sparkling wine made in the traditional champagne, charmat or transfer method in one of the following determined regions: Douro, Ribatejo, Minho, Alentejo or Estremadura. VQPRD is a sparkling wine that can be made by injecting the wine with gas in the traditional champagne, charmat, transfer method anywhere in Portugal. Espumoso is the cheapest and lowest level of sparkling wine, made by injecting the wine with CO2. Top-quality Espumantes can be found in
Wine Country (California) Valley, and Russian River Valley in Sonoma County. Wine grapes are also grown at higher elevations, such as Atlas Peak and Mount Veeder AVAs. Cities and towns associated with the Wine Country include Santa Rosa, Healdsburg, Sonoma, Kenwood, Petaluma, Sebastopol, Guerneville, Windsor, Geyserville, and Cloverdale in Sonoma County; Napa, Yountville, Rutherford, St. Helena and Calistoga in Napa County; and Hopland and Ukiah in Mendocino County. Lake County is an increasingly important part of the area, surpassing Mendocino County in 2014 in price paid per ton of grapes in the North Coast premium market. Wine Country is generally regarded as the