Environment Database - Generation and discharge of wastewater
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Last updated: March 2020

Contact: ENV.Stat@oecd.org

Data for EU countries, England and Wales, Iceland, Switzerland and Turkey is provisional. Data for these countries will be updated when Eurostat will have published its final data.

Data for non-OECD countries is sourced from UNSD

(https://unstats.un.org/unsd/envstats/qindicators.cshtml)

Austria) Break in series in 2016 due to the additional counting of indepenent treatment.

France) Wastewater treatment: the national register covers only large plants with capacity equalling or exceeding 100,000 population equivalent. These large WWTP cover almost 40% of the French population (around half of the French population connected to the public sewerage). Therefore, discharges from households are based on estimates, excluding the population equipped with independent wastewater treatment systems. The population in mainland France connected to the sewerage (80%) is multiplied to the ratios of average daily discharges per person, except for suspended solids. Diffuse emissions, e.g. nitrogen and phosphorus resulting from the use of fertilisers in agriculture, are excluded from this database. Only large livestock farm are included. Diffuse emissions of nitrogen: on average, the release to water amounts to approximately 1,700 tons/day. Around 85 kg are used per hectare per year, for 25 million hectares, of which around 30 % is leached to water. Diffuse emissions of phosphorus: around 7 kg are used per hectare per year, for 25 million hectares. However, the share leached to water is unknown.

Czech Republic) Data for N-Tot (Nitrogen) refers to N-anorg

Lithuania) Wastewater from private households includes run-off rainwater.

Sweden) For more information see

https://www.scb.se/contentassets/6212195289bb44b28ea5f3fd46242d74/mi0903_do_2015_jm_170620.pdf  , https://www.scb.se/contentassets/6212195289bb44b28ea5f3fd46242d74/mi0903_bs_2015.pdfhttps://www.scb.se/contentassets/341c0ce5f3e541819b5e12938e32fe44/mi0106_kd_2016_180403_ad.pdf

https://www.havochvatten.se/download/18.47bf2cd7163855d85cac4cf1/1527746668736/officiell-statistik-kvalitetsdeklaration-kvave-och-fosfor-1995-2016.pdf

Turkey) the industrial sector excludes construction

Costa Rica) Total wastwater generated is estimated by multiplying the volume of water billed to users by 0.75. Break in series in 2015 due to the use of more complete information (data is therefore not comparable to previous years). WWTP effluents do not include runoff rainwater, since the mixing of these 2 types of waters is prohibited. During the period 2008 to 2014, only the generation and treatment of waste water from users of the main public water supply operators (ISIC 36) was reported.

Environment Database - Generation and discharge of wastewaterVariables collected

 

Last updated: March 2020

Contact: ENV.Stat@oecd.org

Data for EU countries, England and Wales, Iceland, Switzerland and Turkey is provisional. Data for these countries will be updated when Eurostat will have published its final data.

Data for non-OECD countries is sourced from UNSD

(https://unstats.un.org/unsd/envstats/qindicators.cshtml)

Austria) Break in series in 2016 due to the additional counting of indepenent treatment.

France) Wastewater treatment: the national register covers only large plants with capacity equalling or exceeding 100,000 population equivalent. These large WWTP cover almost 40% of the French population (around half of the French population connected to the public sewerage). Therefore, discharges from households are based on estimates, excluding the population equipped with independent wastewater treatment systems. The population in mainland France connected to the sewerage (80%) is multiplied to the ratios of average daily discharges per person, except for suspended solids. Diffuse emissions, e.g. nitrogen and phosphorus resulting from the use of fertilisers in agriculture, are excluded from this database. Only large livestock farm are included. Diffuse emissions of nitrogen: on average, the release to water amounts to approximately 1,700 tons/day. Around 85 kg are used per hectare per year, for 25 million hectares, of which around 30 % is leached to water. Diffuse emissions of phosphorus: around 7 kg are used per hectare per year, for 25 million hectares. However, the share leached to water is unknown.

Czech Republic) Data for N-Tot (Nitrogen) refers to N-anorg

Lithuania) Wastewater from private households includes run-off rainwater.

Sweden) For more information see

https://www.scb.se/contentassets/6212195289bb44b28ea5f3fd46242d74/mi0903_do_2015_jm_170620.pdf  , https://www.scb.se/contentassets/6212195289bb44b28ea5f3fd46242d74/mi0903_bs_2015.pdfhttps://www.scb.se/contentassets/341c0ce5f3e541819b5e12938e32fe44/mi0106_kd_2016_180403_ad.pdf

https://www.havochvatten.se/download/18.47bf2cd7163855d85cac4cf1/1527746668736/officiell-statistik-kvalitetsdeklaration-kvave-och-fosfor-1995-2016.pdf

Turkey) the industrial sector excludes construction

Costa Rica) Total wastwater generated is estimated by multiplying the volume of water billed to users by 0.75. Break in series in 2015 due to the use of more complete information (data is therefore not comparable to previous years). WWTP effluents do not include runoff rainwater, since the mixing of these 2 types of waters is prohibited. During the period 2008 to 2014, only the generation and treatment of waste water from users of the main public water supply operators (ISIC 36) was reported.