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12th EWA Brussels Conference
“EU Water Policy and
Sustainable Development”
Storm water overfows
Challenges
Bruno rakedjian - European Commission
Directorate General for Environment
Unit C.2 - Marine Environment & Water Industry
Main result of UWWTD
implementaton in 2012
2
Storm water
sewage overflows
Compliance results at EU-28, EU-15 and EU-13 level regarding
Articles 3 (collection), 4 (secondary treatment) and 5 (more
stringent treatment). Average values are reflected, weighted by
pollution load generated by individual Member States.
Study
Storm water
sewage overflows
3
The Outcome of the study
 Synthesis
 EU legislaton, internatonal conventons (RSCs and river
basin commissions)
 Member States: regulatons and guidance and US
approach
 Overview of storm water overfows in the Member States
 Literature review on potental health risks
• htps://circabc.europa.eu/w/browse/e00a649a-7eb4-40b3-9b19-f5ace7a80e08
Main results
 Lack of knowledge at local/natonal/European level
 A policy that has stll to be achieved in lots of
countries
 Remaining risks related to these emissions on
environment and health
4
Storm water
sewage overflows
Main remaining risks
Microbiological contaminaton of water
Chemical contaminaton of water and
sediments
Oxygen depleton in water bodies
Marine liter/micro plastc contaminaton
5
Storm water
sewage overflows
Uncontrolled Urbanisaton
More impervious areas (more emission of pollutants)
Climate change
Change of frequency and intensity of rain events
(more emission of pollutants)
Higher seasonal reducton of the fow of rivers
(less diluton)
Increase in the temperature of water bodies
(acceleraton in bacteries development)
Antmicrobial resistance
Three ongoing
threats
6
Storm water
sewage overflows
Why is it so important to reduce
storm water sewage overfows?
To implement correctly the European
directves to protect environment
and people health
7
Storm water
sewage overflows
Related to lots of diferent European or
internatonal water regulatons:
• Under the Implementaton programme of the Urban
waste water treatment directve 91/271/EC  treated except
under unusually heavy rainfall
• Under the bathing water profles of the bathing water
directve (BWD) 2006/7/EC  Good or excellent quality
• Under the programme of measures of the Water
framework directve (WFD) 2000/60/EC  good ecological and
chemical status, protected areas objectves (shellfsh, bathing water, …)
8
Implement EU
requirements
Storm water
sewage overflows
• Under the programme of measures of the Marine Strategy
Framework directve (MSFD) 2008/56/EC  good environmental
status, shellfsh protecton, marine liter reducton,…
• under the inventory of the sources of polluton, the
quantty of organic pollutants, the circulaton of
pollutants to protect bivalve molluscs producton areas
regulaton 854/2004  Insure quality for human consumpton specifcally
to avoid fecal, toxin and chemical contaminaton
• under the target of the World sustainable development
goal 6  Halving the proporton of untreated waste water by 2030
• Natura 2000, groundwater, drinking water, foods, farm
animal protecton,…
9
Implement EU
requirements
Storm water
sewage overflows
Why is it so important to reduce
storm water sewage overfows
The example of E-coli contaminaton
(e.g. water leisure actvites, shellfsh
consumpton, water abstracton for
agriculture) 10
Storm water
sewage overflows
E-coli
contamination
11
107
9 104
90%
10%
100 104
8% UWWTP
92% CSO
107
9.5 104
95%
5%
50 104
16% UWWTP
84% CSO
R99%
R99%
107
9.9 104
99%
104
91% UWWTP
9% CSO
R99%
Rain dilution 106
T 109 104
T 59.5 104
4
UWWTP
CSO
UWWTP
CSO
UWWTP
CSO
Storm water
sewage overflows
waterbody
Why is it so important to reduce
storm water sewage overfows
More and more a politcal concern
that has to do with cites atractveness
(bathing water, shellfsh, water leisure
actvites,…) 12
Storm water
sewage overflows
25/08/2015
Politcal strong reacton of a mayor in France afer a
beach polluton due to storm water overfows from
another city.
13
http://
www.20minutes.fr/montpellier/1672575-20150825-montpellier-peut-plus-continu
er-comme-ca-alerte-maire-palavas
Storm water
sewage overflows
14
Storm water
sewage overflows
The solutions
Acton plans
 Implementaton of natonal rain water overfows acton
plan (artcle 17 of the UWWTD)
 Check that measures related to this topic are
implemented if there are the reason of bad quality:
 in the bathing water profles of the BWD
 in the programmes of measures of the WFD and
MSFD.
15
Storm water
sewage overflows
Monitoring measures
Building natonal storm water overfows and storage tank
databases
•
establish indicators to follow the actons plans and
programme of measures and identfy beter this pressure
Agglomeratons of more than 100 000 p.e.
(4% of the agglomeratons ≈ 50% of the total generated
waste water load)
The solutions
16
Storm water
sewage overflows
Storm water
sewage overflows
The solutions
Informaton measures
Improve transparency
Implement beter alert system
at natonal/local level
to prevent contact
with contaminated water
17
Agglomeraton not
compliant
Bathing water in
poor quality
Natura 2000
Storm water
sewage overflows
The solutions
Use INSPIRE services to
share the informaton and
increase knowledge
E.g. Urban waste water
natonal website that
includes not only detailed
informaton about urban
waste water but also
EEA bathing water, Natura
2000, Soe layers
htp://uwwtd.oieau.fr/
18
Storm water
sewage overflows
At source measures
Artcle 191 of the treaty on the functoning of
the European Union
"preventve acton should be taken"
"environmental damage should as a priority be
rectfed at source"
"the polluter should pay"
The solutions
Top priority NWRMs
Natural water retenton measures in urban areas
to limit the introducton of rain water
in combined sewer collectng systems.
19
Storm water
sewage overflows
Commission contributon:
best practces website
htp://www.nwrm.eu/
The solutions
20
Storm water
sewage overflows
NWRMs to be implemented in priority because they
have mid/long term efects but provides mult
benefts…
• Improve water quality and quantty
• Improve air quality
• Improve biodiversity
• Contribute to climate mitgaton
• Contribute to fooding preventon
• Increase recreatonal areas…
 Improve quality of life to all citzens
The solutions
21
Other solutons have to be implemented
 Optmisaton of rain storage in collectng systems
 storage tank(s) related to the collectng system and/or
the treatment plant
 Increase in the capacity of pumping staton(s)
 Increase in the capacity of the treatment plant
 Increase in the capacity of the collectng system
The solutionsStorm water
sewage overflows
What about building separate collectng systems?
The solutions
Storm water
sewage overflows
Advantages
 No more combine sewage overfows if
correctly built
Disadvantages
 Double the cost of the collectng system
 Generate bad connectons (rain in
sewage system and sewage in rain
drainage system)
 If not treated or infltrated, polluted
rain water directly discharged in water
bodies (heavy metals, oil, macro and
micro waste, PAH…)
 Impossibility to avoid malicious acts
 Acceleraton in foodings
22
Excessive costsStorm water
overflows
23
Use the possibilites ofered by the UWWTD directve
concerning excessive costs.
Annex I.A of the UWWTD
• Excessive costs have to be justfed
• It does not allow to do nothing
• It allows progressive implementaton of the projects
24
CONCLUSION
Storm water
overflows
What MS and local authorites have to do
 A beter knowledge and transparency
 A beter management of this policy
 Start now implementng Natural water retenton
measures
 Implementaton of measures to reduce emissions
under the existng regulatons
Thank you for your atten
Bruno Rakedjian
bruno.rakedjian@ ec.europa.eu

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2016 11 08_ewa_storm_water_overflow_final

  • 1. 12th EWA Brussels Conference “EU Water Policy and Sustainable Development” Storm water overfows Challenges Bruno rakedjian - European Commission Directorate General for Environment Unit C.2 - Marine Environment & Water Industry
  • 2. Main result of UWWTD implementaton in 2012 2 Storm water sewage overflows Compliance results at EU-28, EU-15 and EU-13 level regarding Articles 3 (collection), 4 (secondary treatment) and 5 (more stringent treatment). Average values are reflected, weighted by pollution load generated by individual Member States.
  • 3. Study Storm water sewage overflows 3 The Outcome of the study  Synthesis  EU legislaton, internatonal conventons (RSCs and river basin commissions)  Member States: regulatons and guidance and US approach  Overview of storm water overfows in the Member States  Literature review on potental health risks • htps://circabc.europa.eu/w/browse/e00a649a-7eb4-40b3-9b19-f5ace7a80e08
  • 4. Main results  Lack of knowledge at local/natonal/European level  A policy that has stll to be achieved in lots of countries  Remaining risks related to these emissions on environment and health 4 Storm water sewage overflows
  • 5. Main remaining risks Microbiological contaminaton of water Chemical contaminaton of water and sediments Oxygen depleton in water bodies Marine liter/micro plastc contaminaton 5 Storm water sewage overflows
  • 6. Uncontrolled Urbanisaton More impervious areas (more emission of pollutants) Climate change Change of frequency and intensity of rain events (more emission of pollutants) Higher seasonal reducton of the fow of rivers (less diluton) Increase in the temperature of water bodies (acceleraton in bacteries development) Antmicrobial resistance Three ongoing threats 6 Storm water sewage overflows
  • 7. Why is it so important to reduce storm water sewage overfows? To implement correctly the European directves to protect environment and people health 7 Storm water sewage overflows
  • 8. Related to lots of diferent European or internatonal water regulatons: • Under the Implementaton programme of the Urban waste water treatment directve 91/271/EC  treated except under unusually heavy rainfall • Under the bathing water profles of the bathing water directve (BWD) 2006/7/EC  Good or excellent quality • Under the programme of measures of the Water framework directve (WFD) 2000/60/EC  good ecological and chemical status, protected areas objectves (shellfsh, bathing water, …) 8 Implement EU requirements Storm water sewage overflows
  • 9. • Under the programme of measures of the Marine Strategy Framework directve (MSFD) 2008/56/EC  good environmental status, shellfsh protecton, marine liter reducton,… • under the inventory of the sources of polluton, the quantty of organic pollutants, the circulaton of pollutants to protect bivalve molluscs producton areas regulaton 854/2004  Insure quality for human consumpton specifcally to avoid fecal, toxin and chemical contaminaton • under the target of the World sustainable development goal 6  Halving the proporton of untreated waste water by 2030 • Natura 2000, groundwater, drinking water, foods, farm animal protecton,… 9 Implement EU requirements Storm water sewage overflows
  • 10. Why is it so important to reduce storm water sewage overfows The example of E-coli contaminaton (e.g. water leisure actvites, shellfsh consumpton, water abstracton for agriculture) 10 Storm water sewage overflows
  • 11. E-coli contamination 11 107 9 104 90% 10% 100 104 8% UWWTP 92% CSO 107 9.5 104 95% 5% 50 104 16% UWWTP 84% CSO R99% R99% 107 9.9 104 99% 104 91% UWWTP 9% CSO R99% Rain dilution 106 T 109 104 T 59.5 104 4 UWWTP CSO UWWTP CSO UWWTP CSO Storm water sewage overflows waterbody
  • 12. Why is it so important to reduce storm water sewage overfows More and more a politcal concern that has to do with cites atractveness (bathing water, shellfsh, water leisure actvites,…) 12 Storm water sewage overflows
  • 13. 25/08/2015 Politcal strong reacton of a mayor in France afer a beach polluton due to storm water overfows from another city. 13 http:// www.20minutes.fr/montpellier/1672575-20150825-montpellier-peut-plus-continu er-comme-ca-alerte-maire-palavas Storm water sewage overflows
  • 14. 14 Storm water sewage overflows The solutions Acton plans  Implementaton of natonal rain water overfows acton plan (artcle 17 of the UWWTD)  Check that measures related to this topic are implemented if there are the reason of bad quality:  in the bathing water profles of the BWD  in the programmes of measures of the WFD and MSFD.
  • 15. 15 Storm water sewage overflows Monitoring measures Building natonal storm water overfows and storage tank databases • establish indicators to follow the actons plans and programme of measures and identfy beter this pressure Agglomeratons of more than 100 000 p.e. (4% of the agglomeratons ≈ 50% of the total generated waste water load) The solutions
  • 16. 16 Storm water sewage overflows Storm water sewage overflows The solutions Informaton measures Improve transparency Implement beter alert system at natonal/local level to prevent contact with contaminated water
  • 17. 17 Agglomeraton not compliant Bathing water in poor quality Natura 2000 Storm water sewage overflows The solutions Use INSPIRE services to share the informaton and increase knowledge E.g. Urban waste water natonal website that includes not only detailed informaton about urban waste water but also EEA bathing water, Natura 2000, Soe layers htp://uwwtd.oieau.fr/
  • 18. 18 Storm water sewage overflows At source measures Artcle 191 of the treaty on the functoning of the European Union "preventve acton should be taken" "environmental damage should as a priority be rectfed at source" "the polluter should pay" The solutions
  • 19. Top priority NWRMs Natural water retenton measures in urban areas to limit the introducton of rain water in combined sewer collectng systems. 19 Storm water sewage overflows Commission contributon: best practces website htp://www.nwrm.eu/ The solutions
  • 20. 20 Storm water sewage overflows NWRMs to be implemented in priority because they have mid/long term efects but provides mult benefts… • Improve water quality and quantty • Improve air quality • Improve biodiversity • Contribute to climate mitgaton • Contribute to fooding preventon • Increase recreatonal areas…  Improve quality of life to all citzens The solutions
  • 21. 21 Other solutons have to be implemented  Optmisaton of rain storage in collectng systems  storage tank(s) related to the collectng system and/or the treatment plant  Increase in the capacity of pumping staton(s)  Increase in the capacity of the treatment plant  Increase in the capacity of the collectng system The solutionsStorm water sewage overflows
  • 22. What about building separate collectng systems? The solutions Storm water sewage overflows Advantages  No more combine sewage overfows if correctly built Disadvantages  Double the cost of the collectng system  Generate bad connectons (rain in sewage system and sewage in rain drainage system)  If not treated or infltrated, polluted rain water directly discharged in water bodies (heavy metals, oil, macro and micro waste, PAH…)  Impossibility to avoid malicious acts  Acceleraton in foodings 22
  • 23. Excessive costsStorm water overflows 23 Use the possibilites ofered by the UWWTD directve concerning excessive costs. Annex I.A of the UWWTD • Excessive costs have to be justfed • It does not allow to do nothing • It allows progressive implementaton of the projects
  • 24. 24 CONCLUSION Storm water overflows What MS and local authorites have to do  A beter knowledge and transparency  A beter management of this policy  Start now implementng Natural water retenton measures  Implementaton of measures to reduce emissions under the existng regulatons
  • 25. Thank you for your atten Bruno Rakedjian bruno.rakedjian@ ec.europa.eu