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In 2018, Greece had 464 urban waste water agglomerations of more then 2 000 population equivalent (p.e). These agglomerations generated a total load of 11 870 177 p.e. 91% of this load is connected to collecting systems and 9% addressed through Individual and Appropriate Systems (storage or septic tanks, micro-stations,...). These agglomerations are connected to 6 secondary treatment plants and 226 more stringent treatment plants. All these treatment plants have a total design capacity of 13 982 461 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 system10,777,575 pe, 90.8 %
Individual and Appropriate Systems1,092,602 pe, 9.2 %
Discharged without treatment0 pe, 0 %
Total11,870,177 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 system6,473,890 pe
35 na
Combine system1,417,627 pe
35 na
No information1,028,167 pe
199 na
Separative system2,950,493 pe
195 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
Compliant11,452,376 pe
Not Compliant417,801 pe
Total11,870,177 pe
*pe: Population equivalent
Number of agglomerations by compliance
See the data table
Number of agglomerations by compliance
See diagram
Compliance state2018
Compliant435
Not Compliant29
Total464
*: 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 connected7,899 pe
Not Compliant419,627 pe
Not relevant268,875 pe
Compliant10,564,516 pe
Total11,260,917 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 connected4
Not Compliant29
Not relevant48
Compliant155
Total236
*: 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 treatment20,271 pe
More stringent treatment11,240,646 pe
Total11,260,917 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 treatment8
More stringent treatment228
Total236
*: 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 pe1,510,909 pe
10,000 to 100,000 pe3,088,722 pe
> 100,000 pe7,270,546 pe
Total11,870,177 pe
*pe: Population equivalent
Number of agglomerations by size
See the data table
Number of agglomerations by size
See diagram
Size2018
< 10,000 pe338
10,000 to 100,000 pe116
> 100,000 pe10
Total464
*: 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
BODdata not available3,377.20 tons/year
CODdata not available15,263.12 tons/year
Ndata not available3,537.81 tons/year
Pdata not available314.37 tons/year
BOD, COD, N, P concentration
See the data table
BOD, COD, N, P concentration
See diagram
2018
ParameterEnteringDischarged
BODdata not available8.14 mg/l
CODdata not available36.80 mg/l
Ndata not available8.53 mg/l
Pdata not available0.76 mg/l

MS Level statistics

Sludge destination
See the data table
In 2018, 103,281 Tons DS of sludge was generated
Sludge destination
See diagram
In 2018, 103,281 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 agriculture10,188.0
Re-used: Others0.0
Disposed: Landfill36,828.0
Disposed: Incineration37,706.0
Disposed: Others18,559.0
Total103,281.0
Water re-use

2018 : 2 % of treated waste water are re-used. This water is used in agriculture and in others use.
Explanation : For wastewater reuse refer to general comments. ground water recharge and reuse for the needs of the wastewater treatment plant

As regards landfill disposal, it takes place only after previous appropriate treatment of sludge and not as raw organic matter. Treated sludge is usually used as a landfill coating layer, combined with other materials, according to the relevant environme

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
201811,870,177 - -
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
2018464 - -
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
201810,123,127397,600256,849
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
201818928247
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
20186,565,50035,6004,176,475
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
2018153446