Muddy water supply during rains

My query is pertaining to the city of Belagavi in Karnataka. It lies in the western ghat region and receives heavy rainfall during monsoon.

My queries are as follows:

  1. Why is the municipal water supply muddy during the rainy season?
  2. Is it because of the inefficiency in the water treatment facilities?
  3. Are the treatment methods used outdated? Please brief me on the various treatment methods.
  4. Isn't the water supply board legally bound to supply safe potable water?