Pain behind the Knees â Causes, Risk Factors and Treatment. An injury or blow to the back of the leg due to a fall or some other accident may lead to considerable pain in the posterior knee region. A sprain may lead to considerable pain, that may be accompanied by redness and swelling.
Ontario is a Province in Canada. There are no US states by that name. There is Ontario California stateside. Valerie Lee.
History of Ontario, San Bernardino County, California. Water is taken from the San Antonio Creek, draining one of the largest mountain districts in Southern California. Ontario has half the surplus flow, owning exclusively a tunnel 2,000 feet long that taps the subterranean flow.