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In 2018, Spain had 2059 urban waste water agglomerations of more then 2 000 population equivalent (p.e). These agglomerations generated a total load of 64 535 402 p.e. 99% of this load is connected to collecting systems and 1% addressed through Individual and Appropriate Systems (storage or septic tanks, micro-stations,...). These agglomerations are connected to 30 primary treatment plant, 566 secondary treatment plants and 1203 more stringent treatment plants. All these treatment plants have a total design capacity of 99 794 323 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 system63,628,387 pe, 98.6 %
Individual and Appropriate Systems638,768 pe, 1 %
Discharged without treatment268,248 pe, 0.4 %
Total64,535,402 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 system5,923,633 pe
129 na
Combine system28,985,459 pe
939 na
No information29,489,929 pe
978 na
Separative system136,381 pe
13 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
Compliant54,102,996 pe
Not Compliant10,432,406 pe
Total64,535,402 pe
*pe: Population equivalent
Number of agglomerations by compliance
See the data table
Number of agglomerations by compliance
See diagram
Compliance state2018
Compliant1,579
Not Compliant480
Total2,059
*: 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 connected252,038 pe
Not Compliant7,767,592 pe
Not relevant422,372 pe
Compliant57,180,657 pe
Total65,622,659 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 connected220
Not Compliant259
Not relevant75
Compliant1,465
Total2,019
*: 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 treatment12,096,504 pe
Primary treatment668,790 pe
Not connected165,458 pe
More stringent treatment52,691,907 pe
Total65,622,659 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 treatment603
Primary treatment31
Not connected181
More stringent treatment1,204
Total2,019
*: 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 pe6,035,959 pe
10,000 to 100,000 pe19,721,599 pe
> 100,000 pe38,777,844 pe
Total64,535,402 pe
*pe: Population equivalent
Number of agglomerations by size
See the data table
Number of agglomerations by size
See diagram
Size2018
< 10,000 pe1,265
10,000 to 100,000 pe668
> 100,000 pe126
Total2,059
*: 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
BOD45,203,231.75 tons/year3,288,591.14 tons/year
COD93,088,440.63 tons/year31,994,686.12 tons/year
N5,933,281.23 tons/year16,703,317.98 tons/year
P707,244.42 tons/year1,421,125.36 tons/year
BOD, COD, N, P concentration
See the data table
BOD, COD, N, P concentration
See diagram
2018
ParameterEnteringDischarged
BOD11,644.05 mg/l847.12 mg/l
COD23,978.96 mg/l8,241.62 mg/l
N1,528.37 mg/l4,302.66 mg/l
P182.18 mg/l366.07 mg/l

MS Level statistics

Sludge destination
See the data table
In 2018, 552,310 Tons DS of sludge was generated
Sludge destination
See diagram
In 2018, 552,310 Tons DS of sludge was generated
Destination2018
Discharged into surface waters : Pipelines0.0
Discharged into surface waters : Ships0.0
Discharged into surface waters : Others11,346.9
Re-used: Soil and agriculture423,514.0
Re-used: Others0.0
Disposed: Landfill54,212.1
Disposed: Incineration55,251.9
Disposed: Others7,984.4
Missing0.8
Total552,310.0

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
201863,505,8181,029,584 -
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
20182,0545 -
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
201856,486,2427,022,177386,866
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
20181,511440108
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
201815,210,7824,007,51244,410,093
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
2018213631,783