These approaches can be received by checking the industry, municipal waste waters and to evaluate diffuse pollution.
Checking the industry about what type of industry we have there - it is prevailing - we cannot say prevailing but what kind of types of industry is there, what is a specific industry producing on waste water, and the type compared to the environmental relevance. The size of the industry and its water consumption, the estimation of effluents' loads and the process integrated treatment. Point and time of discharge, if all of the affluent goes to the CETP or if part is sent also directly to the surface water, or is it infiltrated on the property itself. And the location of the industry: far away, next to the Vagu, etc.
For the municipal waste water there is a question about the sewerage system: how looks like the treatment system, the estimation of the effluent's loads, the points of discharge, the type of the water supply.
For to evaluate the diffuse pollution, if it comes and to which extent it comes from agriculture, from contaminated soil, how are the properties of the soil, the vulnerability of the aquifer, and the area where its pollution happens, point or diffusive pollution.
All together will be evaluated, all the answers will be evaluated and a classification into low, medium and high concern will be made.