Serravalle a Po is a comune in the Province of Mantua in the Italian region Lombardy, located about 150 kilometres east of Milan and about 20 k…Serravalle a Po is a comune in the Province of Mantua in the Italian region Lombardy, located about 150 kilometres east of Milan and about 20 kilometres east of Mantua. Serravalle a Po borders the following municipalities: Gazzo Veronese, Ostiglia, Borgo Mantovano, Quingentole, Sustinente.