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In 2018, Italy had 3034 urban waste water agglomerations of more then 2 000 population equivalent (p.e). These agglomerations generated a total load of 78 024 142 p.e. 95% of this load is connected to collecting systems and 4% addressed through Individual and Appropriate Systems (storage or septic tanks, micro-stations,...). These agglomerations are connected to 120 primary treatment plant, 395 secondary treatment plants and 3176 more stringent treatment plants. All these treatment plants have a total design capacity of 101 855 779 p.e.

Agglomeration : Generated load by collection

Generated Load by collection type (population equivalent – p.e.)
See the data table
Generated Load by collection type (population equivalent – p.e.)
See diagram
Destination2018
Collected by collecting system74,396,560 pe, 95.4 %
Individual and Appropriate Systems3,053,790 pe, 3.9 %
Discharged without treatment573,727 pe, 0.7 %
Total78,024,077 pe, 100 %
*pe: Population equivalent, *%: Rate
Generated Load by sewage network type (population equivalent – p.e.)
See the data table
Generated Load by sewage network type (population equivalent – p.e.)
See diagram
Network type2018
Separative and combine system19,930,909 pe
316 na
No information25,234,104 pe
2,162 na
Combine system27,927,322 pe
427 na
Separative system4,931,807 pe
129 na
*pe: Population equivalent, *na: Number of agglomerations

Agglomeration : Generated load by compliance

Total generated load by compliance (population equivalent – p.e.)
See the data table
Total generated load by compliance (population equivalent – p.e.)
See diagram
Compliance state2018
Compliant43,987,893 pe
Not Compliant34,036,249 pe
Total78,024,142 pe
*pe: Population equivalent
Number of agglomerations by compliance
See the data table
Number of agglomerations by compliance
See diagram
Compliance state2018
Compliant2,055
Not Compliant979
Total3,034
*: Number of elements

Waste water treatment plant : Load entering by compliance

Total load entering by compliance (population equivalent – p.e.)
See the data table
Total load entering by compliance (population equivalent – p.e.)
See diagram
Compliance state2018
Not connected425,914 pe
Not Compliant7,514,621 pe
Not relevant354,862 pe
Compliant62,418,555 pe
Total70,713,952 pe
*pe: Population equivalent
Number of treatment plants by compliance
See the data table
Number of treatment plants by compliance
See diagram
Compliance state2018
Not connected1,574
Not Compliant505
Not relevant56
Compliant3,130
Total5,265
*: Number of elements

Waste water treatment plant : Load entering by treatment type

Total load entering by treatment type (population equivalent – p.e.)
See the data table
Total load entering by treatment type (population equivalent – p.e.)
See diagram
Treatment type2018
Secondary treatment4,258,714 pe
Primary treatment402,863 pe
Not connected282,742 pe
More stringent treatment65,769,633 pe
Total70,713,952 pe
*pe: Population equivalent
Number of treatment plants by treatment type
See the data table
Number of treatment plants by treatment type
See diagram
Treatment type2018
Secondary treatment396
Primary treatment533
Not connected1,083
More stringent treatment3,253
Total5,265
*: Number of elements

Agglomeration : generated load by agglomeration size

Total generated load by agglomeration size (population equivalent – p.e.)
See the data table
Total generated load by agglomeration size (population equivalent – p.e.)
See diagram
Size2018
< 10,000 pe8,878,074 pe
10,000 to 100,000 pe29,852,743 pe
> 100,000 pe39,293,325 pe
Total78,024,142 pe
*pe: Population equivalent
Number of agglomerations by size
See the data table
Number of agglomerations by size
See diagram
Size2018
< 10,000 pe1,920
10,000 to 100,000 pe978
> 100,000 pe136
Total3,034
*: Number of elements

Waste water treatment plant : Total load entering and discharged

Total load entering and discharged
See the data table
Total load entering and discharged
See diagram
2018
ParameterEnteringDischarged
BOD556,936.21 tons/year27,698.24 tons/year
COD1,171,972.20 tons/year98,098.57 tons/year
N117,503.88 tons/year21,046.11 tons/year
P505,711.25 tons/year9,646.68 tons/year
BOD, COD, N, P concentration
See the data table
BOD, COD, N, P concentration
See diagram
2018
ParameterEnteringDischarged
BOD7.72 mg/l0.38 mg/l
COD16.24 mg/l1.36 mg/l
N1.63 mg/l0.29 mg/l
P7.01 mg/l0.13 mg/l

MS Level statistics

Sludge destination
See the data table
In 2018, 387,289 Tons DS of sludge was generated
Sludge destination
See diagram
In 2018, 387,289 Tons DS of sludge was generated
Destination2018
Discharged into surface waters : Pipelines0.0
Discharged into surface waters : Ships0.0
Discharged into surface waters : Others0.0
Re-used: Soil and agriculture92,705.2
Re-used: Others121,953.2
Disposed: Landfill44,080.6
Disposed: Incineration49,209.0
Disposed: Others79,340.6
Missing0.0
Total387,288.6
Data on wastewater reuse percentage are available only for a few regions (not at national level) and vary from 0.28% to 5%. Wastewater is mainly reused in agriculture and for environmental purposes (e.g. improvement of water bodies qualitative status).

Legal compliance

Legal compliance for collection in p.e.
See the data table
Legal compliance for collection in p.e.
See diagram
YearCompliantNot compliantNot relevant
201874,134,1303,890,012 -
Legal compliance for collection by number of agglomerations
See the data table
Legal compliance for collection by number of agglomerations
See diagram
YearCompliantNot compliantNot relevant
20182,821213 -
Legal compliance for 2nd treatment in p.e.
See the data table
Legal compliance for 2nd treatment in p.e.
See diagram
YearCompliantNot compliantNot relevant
201859,958,74314,696,304294,811
Legal compliance for 2nd treatment by number of agglomerations
See the data table
Legal compliance for 2nd treatment by number of agglomerations
See diagram
YearCompliantNot compliantNot relevant
20182,24571673
Legal compliance for 3rd treatment in p.e.
See the data table
Legal compliance for 3rd treatment in p.e.
See diagram
YearCompliantNot compliantNot relevant
201829,271,3656,002,65939,132,169
Legal compliance for 3rd treatment by number of agglomerations
See the data table
Legal compliance for 3rd treatment by number of agglomerations
See diagram
YearCompliantNot compliantNot relevant
2018475752,484