The factors that made it difficult for Eastern Europe to improve its water quality were outdated sewer systems, raw water quality, worn-out water utilities and unskilled employees. So we can say that four options given in the question fits the bill perfectly. These basic infrastructural reasons were responsible for being a hurdle towards improving the water quality. <span />
The factors that make it difficult for Eastern Europe to improve its water quality are: outdated sewer systems
, raw water quality
, unskilled employees
, worn-out water utilities.
The majority of countries in Europe do have safe drinking water. However, there are few where you'll need to take precautions and some other, where you'll want to avoid drinking water In general, Western Europe has safe tap water but Eastern Europe is a place to be wary of the water.
