We tracked USDA website since January 29, 2018. During last 30 days, it hasn't been working 29 times - on September 21, 2018, September 20, 2018, September 19, 2018, September 18, 2018, September 17, 2018, September 16, 2018, September 15, 2018, September 14, 2018, September 13, 2018, September 12, 2018, September 11, 2018, September 10, 2018, September 9, 2018, September 8, 2018, September 7, 2018, September 6, 2018, September 5, 2018, September 4, 2018, September 3, 2018, September 2, 2018, September 1, 2018, August 31, 2018, August 30, 2018, August 29, 2018, August 28, 2018, August 27, 2018, August 26, 2018, August 25, 2018 and August 24, 2018. The average response time is 0.159 sec which is very good. Note that response time may vary depending on how far you are from the Usda.gov server located in Fort Collins, United States.