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In 2016, Spain had 2084 urban waste water agglomerations of more then 2 000 population equivalent (p.e). These agglomerations generated a total load of 64 819 277 p.e. 98% 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 32 primary treatment plant, 619 secondary treatment plants and 1174 more stringent treatment plants. All these treatment plants have a total design capacity of 97 513 858 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
Destination2016
Collected by collecting system63,790,031 pe, 98.4 %
Individual and Appropriate Systems724,507 pe, 1.1 %
Discharged without treatment304,739 pe, 0.5 %
Total64,819,277 pe, 99 %
*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 type2016
Combine system28,184,750 pe
890 na
Separative and combine system5,803,145 pe
129 na
Separative system107,142 pe
13 na
No information30,724,240 pe
1,052 na
*pe: Population equivalent, *na: Number of agglomeration

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 state2016
Compliant50,651,183 pe
Not Compliant14,168,094 pe
Total64,819,277 pe
*pe: Population equivalent
Number of agglomerations by compliance
See the data table
Number of agglomerations by compliance
See diagram
Compliance state2016
Compliant1,531
Not Compliant553
Total2,084
*: 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 state2016
Compliant57,243,173 pe
Not relevant418,843 pe
Not Compliant10,673,164 pe
Total68,335,180 pe
*pe: Population equivalent
Number of treatment plant by compliance
See the data table
Number of treatment plant by compliance
See diagram
Compliance state2016
Compliant1,404
Not relevant75
Not Compliant298
Total1,777
*: 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 type2016
More stringent treatment53,627,276 pe
Secondary treatment13,755,863 pe
Primary treatment952,041 pe
Total68,335,180 pe
*pe: Population equivalent
Number of treatment plant by treatment type
See the data table
Number of treatment plant by treatment type
See diagram
Treatment type2016
More stringent treatment1,169
Secondary treatment577
Primary treatment31
Total1,777
*: 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
Size2016
< 10,000 pe6,178,674 pe
10,000 to 100,000 pe19,305,222 pe
> 100,000 pe39,335,381 pe
Total64,819,277 pe
*pe: Population equivalent
Number of agglomeration by size
See the data table
Number of agglomeration by size
See diagram
Size2016
< 10,000 pe1,292
10,000 to 100,000 pe663
> 100,000 pe129
Total2,084
*: 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
2016
ParameterEnteringDischarged
BOD48,770,815.72 tons/year2,978,236.98 tons/year
COD102,845,547.05 tons/year28,055,268.58 tons/year
N5,163,002.86 tons/year12,952,872.10 tons/year
P520,586.50 tons/year1,182,588.31 tons/year
BOD, COD, N, P concentration
See the data table
BOD, COD, N, P concentration
See diagram
2016
ParameterEnteringDischarged
BOD5,882.75 mg/l359.24 mg/l
COD12,405.27 mg/l3,384.04 mg/l
N622.76 mg/l1,562.38 mg/l
P62.79 mg/l142.64 mg/l

MS Level statistics

Sludge destination
See the data table
In 2016, 819,501 Tons DS of sludge was generated
Sludge destination
See diagram
In 2016, 819,501 Tons DS of sludge was generated
Destination2016
Discharged into surface waters : Pipelines0.0
Discharged into surface waters : Ships0.0
Discharged into surface waters : Others0.0
Re-used: Soil and agriculture664,205.0
Re-used: Others82,492.0
Disposed: Landfill18,693.0
Disposed: Incineration54,111.0
Disposed: Others0.0
Total819,501.0
Water re-use

2016 : 9.72 % of treated waste water are re-used. This water is used in agriculture, in industry and in others use.

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
201662,853,1461,966,131 -
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
20162,06915 -
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
201654,399,4838,995,988394,560
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
20161,488492104
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
201611,938,7326,312,08945,539,210
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
2016167941,823