| Characteristic | Number of wastewater treatment plants |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
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Source
Source
Release date
November 2016
More information
Region
Italy
Survey time period
2015
Supplementary notes
Primary (mechanical) treatment: removes gross, suspended and floating solids from raw sewage.
Secondary (biological) treatment: removes the dissolved organic matter that escapes primary treatment.
Tertiary treatment: removes more than 99 percent of all the impurities from sewage, producing almost drinking water quality.
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