The Emergency Quota Act had been proposed several times before, but never made it through until 1921. The main reason for passing the Act was that the flood of immigrants in recent years had negative wage effects on native-born Americans. This led to increasing support for immigration restrictions. Another factor was the decreasing political power of immigration groups.
-The immigration level was limited to 3% in 1921 by the Emergency Quota Act, soon to be limited by the Immigration Act of 1924, which brought it down to 2%.
-The average annual inflow of immigrants prior to 1921 was 176,983 from Northern and Western Europe, and 685,531 from other countries, principally Southern and Eastern Europe.
-In 1921, the incoming immigrant population was settled down to 198,082 from Northern and Western Europe, and 158,367 from principally Southern and Eastern Europe (including other countries), being shown as a drastic reduction in immigration levels from other countries, principally Southern And Eastern Europe. This also portrays a 3% level in reduction. This was due to the Emergency Quota Act of 1921.
-The 2% level was reached in the Quota Act of 1924, where levels dropped to 140,999 for Northern and Western Europe, and 21,847 for other countries, principally Southern and Eastern Europe.''
-The census used for the Emergency Quota Act was the 1910 census. (The Immigration Act of 1924 was based on the census of 1890.)
The Act set no limits on immigration from Latin America.