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DanteMaschio Feb 07, 2019 01:54 PM
doubts about the reported data on the Urban Waste Water Treatment Directive (UWWTD)

Hello,

I am working on a database based on the Urban Waste Water Treatment Directive (UWWTD) data reported by the EU Member States. Here there are some doubts I can not solve with the information available on the EEA website.

General questions:
- Can we understand Individual Appropriate System (IAS) as an on-site treatment?
- According to the descriptions of the updated tables on the web now the number of real inhabitants is reported in the agglomeration table. However these data are not up to date. It will be available?

In relation to some tables:
1. T_UWWTPs:
(uwwloadentering) Is there a possibility to have the influence flow in m3 /d?
(uwwstate) How can I understand the inactive and temporarily inactive state for each uwwtps point?
(uwwdateclosing and uwwendlife) Could I understand that records prior to the current date are points that are no working now?
(uwwotherteatment) Which is the difference between Tertiary treatment (UV, Cl, O3,…) and Other – more stringent treatment?
(uwwperformance) How can I understand the Not Relevant registers?

2. T_agglomerations
(agglstate) How can I understand the inactive or temporarily inactive state for each agglomeration?
(aggendlife) What it meant that an agglomeration has reached its end of life?

3. T_UWWTPAgglom
When it is an imperative to report the relationship UWWTPs:Agglomeration?

4. T_UWWdischargepoints
(dcpstate) How can I understand the inactive and temporarily inactive state of a discharge point?

5. T_UWWemissionload:
Why there is so little information about the polluting charges (BOD, COD, TSS) that come in and out of UWWTPs?


I would also be useful if you can send me the Spanish contact who report and work on the data related to this directive.

Thanks,

Dante
Replies (1)
EEA Feb 26, 2019 01:06 PM
Hello,

Thank you for contacting the European Environment Agency (EEA).

Kindly note our replies to your general enquiries.

  - Can we understand Individual Appropriate System (IAS) as an on-site treatment?
It can be on-site treatment or site where waste water is transported by trucks to a treatment plant (waste water treated but not connected to collecting system).

  - According to the descriptions of the updated tables on the web now the number of real inhabitants is reported in the agglomeration table. However these data are not up to date. It will be available?
The number of real inhabitants is not reported. Instead, population equivalent is reported, based on pollution load (please see: http://ec.europa.eu/[…]/glossary_en.htm). We hope that the 2017 data will be published later this year.

With regard to your enquiries in relation to some tables, kindly note the replies hereunder.

  1. T_UWWTPs:
  - (uwwloadentering) Is there a possibility to have the influence flow in m3 /d?
This is in population equivalent. There is other information uwwWasteWaterTreated (m3/year); however this information is not a part of the publicly available database. Where the information is available (15-20% treatment plants only), you may see the volume treated in m3/d for each UWWTP through the dataviewer: https://tableau.discomap.ee[…]nt=no&%3AshowVizHome=no
  
  - (uwwstate) How can I understand the inactive and temporarily inactive state for each uwwtps point?
Inactive/temporarily inactive uwwtps include treatment plants which are not connected/not working in the real world. It could be old or planned treatment plants (including those which are not built yet). In some cases, it can also include treatment plants which are not relevant for UWWTD (e.g. Croatia was in the transitional period during the reporting and such not obliged to input all obligatory information but still creating a dataset)

  - (uwwdateclosing and uwwendlife) Could I understand that records prior to the current date are points that are no working now?
If the current date is after uwwdateclosing and uwwendlife and uwwstate is 0, the treatment plant should not work anymore.

  - (uwwotherteatment) Which is the difference between Tertiary treatment (UV, Cl, O3,…) and Other – more stringent treatment?
uwwotherteatment should only be 'true' if secondary treatment is 'true'. The other parameters describe the type of treatment implemented.

  - (uwwperformance) How can I understand the Not Relevant registers?
uww performance is not relevant if the treatment plant is outside the scope of the Directive (e.g. the connected agglomeration is below 2000 population equivilant or below 10 000 if discharging into coastal water or discharging into less sensitive areas. N/P performance is not relevant for treatment plants outside sensitive areas or below 10000 population equivalent)

  2. T_agglomerations
  - (agglstate) How can I understand the inactive or temporarily inactive state for each agglomeration?
This could be agglomeration with population decreased below 2000, agglomeration which was merged with other or split.

  - (aggendlife) What it meant that an agglomeration has reached its end of life?
Agglomeration could be split or merged with another agglomeration.

  3. T_UWWTPAgglom
  - When it is an imperative to report the relationship UWWTPs:Agglomeration?
The relationship has to be established for all active agglomerations with non zero share of wastewater connected to collecting system (aggC1>1) and for all active treatment plants/collecting systems

  4. T_UWWdischargepoints
  - (dcpstate) How can I understand the inactive and temporarily inactive state of a discharge point?
Inactive discharge point - it should be discharge point where no water is discharged (e.g. the collecting system is connected to another treatment plant, while this is not operating). In some cases it could be discharge point/Treatment Plant/agglomeration which are outside the scope of the Directive.

  5. T_UWWemissionload:
  - Why there is so little information about the polluting charges (BOD, COD, TSS) that come in and out of UWWTPs?
This information is not mandatory and the countries report it on a voluntary basis. We ask for the information but we cannot force the countries to provide it.

You may wish to be advised that the Spanish responsible organisation is the Ministerio de Medio Ambiente Subdireccion General de Planificacion y Uso Sostenible del Agua.

We hope this information may be useful to you.

Kind regards,
EEA Enquiry Service
 
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