Only few years ago Kathmandu city was not facing today problems, as we know now Kathmandu city is second over polluted city of Asia. Nepal is a developing country, so still maximum Nepalese places are under developed, that why every Nepalese has a dream to go Kathmandu and they want to establish there, they want good future for them as well there their child. But now Kathmandu city is facing main problems that is due to the over population. Now Kathmandu city is being over populated and polluted, Bagmati river is a one main river of Nepal, which lies in Kathmandu city but due to the over pollution it has lost it identities. Bagmati river has historical and religion meaning but now just we can see it as a dirty river, so being capital city also Kathmandu city is facing many problems. This is a tourism year of Nepal 2011 but still Nepalese Government has not giving main focus on these problem, so to solve it, as soon as possible Government and every citizen should take positive way.