JASTRZEBIE-ZDRJ

city, Katowice wojewdztwo (province), south-central Poland. With the cities of Racibrz, Rybnik, and Katowice, Jastrzebie-Zdrj constitutes a secondary industrial zone within Poland's Upper Silesian agglomeration bordering on the Czech industrial region of Ostrava. Jastrzebie-Zdrj became popular in the 1860s as a thermal spa whose iodobromide waters were used to treat nervous disorders, rheumatism, and heart diseases. When it received city rights in 1963 its population was 3,000. The discovery of large coking-coal deposits near the city caused a dramatic surge in population within the decade. Pop. (1991 est.) 104,000.