Jean-Michel Seillier, Regional Manager Victoria, Veolia Water - Presentation at the United Nations Association of Australia (Victorian Division) Corporate Sustainability Leadership Seminar ‘Corporate Water Valuation: Accounting for Risks and Impacts, Valuing Ecosystem Services’ held on Monday 29 April 2013, in partnership with National Australia Bank. Held in support of the International Year of Water Cooperation, seminar addressed some of the challenges and opportunities associated with corporate water valuation, as well as local actions and global tools and initiatives in this area. It highlighted some examples of what Australian businesses are doing, alongside government and NGOs, to measure and manage their risks, impacts and dependencies on water. Guest Speakers & Panelists included: • Rosemary Bissett, Head of Sustainability, Governance & Risk, Enterprise Risk, National Australia Bank • Matt Kendall, General Manager, Planning and Evaluation Group, National Water Commission • Carl Obst, Editor, UN System of Environmental-Economic Accounting (SEEA) • Jean-Michel Seillier, Regional Manager Victoria, Veolia Water • Gioia Small, Regional Manager Sustainability and Vintrepreneur, Treasury Wine Estates • Michael Spencer, Secretary, Water Stewardship Australia and Fellow, Department of Business, Law and Taxation, Monash University Facilitator: • Rob Gell, Environmental Entrepreneur, Chairman of UNESCO Western Port Biosphere, and Chair of Wildlife Victoria More information available at: http://www.unaavictoria.org.au/education-advocacy/masterclasses/corporate-water-valuation-seminar/

1. )26/04/2013
VEOLIA’S WATER
IMPACT INDEX: A NEW
TOOL FOR WATER
FOOTPRINTING
JM SEILLIER

2. WATER FOOTPRINT: A CONCEPT RATHER THAN
A SINGLE METHODOLOGY
Still no consensus definition…
2
“Footprint: a mark of a foot or shoe on a surface”
“Water Footprint: environmental impact(s) of
human activities on water bodies”

3. WATER IMPACT INDEX - WII
Not an environmental labeling tool
New tool for sustainability
For decision making
For introducing the multi-impact approach
For communication
For raising awareness

4. WII– WHAT IS IT?
Water can be “consumed” in two ways
1. Withdraw and return less
2. Pollute – a polluted resource is no resource!
An assessment of the human footprint on water resources taking
into account consumption, resource stress and quality.

5. WHY GO BEYOND A VOLUMETRIC APPROACH?
0
50
100
150
200
250
300
350
575g of tomato
pasta sauce
250g of peanut
candies
Gallonofwater
Volumetric approach
Applying impact
assessment factors
0
10
20
30
40
575g of tomato
pasta sauce
250g of peanut
candies
Stress-weighted water footprints
Gallon-eqofwater
39 G-eq
4 G-eq
Water Footprint™: tomato pasta
sauce and peanut candies
Tomatoes require more
fertilizers (water pollution)
Peanut
production:
rain fed
agriculture
Tomatoes are
produced in water
stressed areas
Ridoutt, B.G., Pfister, S., 2010. A revised approach to water footprinting to make transparent the impacts of consumption and
production on global freshwater scarcity. Global Environ, 20 (1), 113-120
Tomato sauce contributes 10 times
more to freshwater depletion
The production of peanut candies
requires 6 times more water than
the production of tomato sauce

6. WII: HOW IS IT CALCULATED?
6
j k
]]
Water Impact Index
Equation Stress Index Quality Index
WIIX = ∑[Wj x WSIj x minl [1;
Crefl
Cj,l
]]–∑ [Rk x WSIkx minl [1;
Crefl
Ck,l
Volume Withdrawn Volume Released
• Algorithm addresses water quality and quantity as well as a local stress
impact factor
• Uses Water Stress Index from Ridoutt and Pfister (2009)
The WSI is function of:
• Water use to availability ratio (regionalized)
• Seasonality of freshwater availability
• Storage capacity
• Quality Index
0 < WSI < 1
Non-stressed area “Desert”

7. WII: HOW IS IT CALCULATED?
WII= Water Stress Index * ((Volume Extracted * Quality Index ) – (Volume Released * Quality Index))
or Difference between the quality of the water
(abstracted or discharged) and Water
Quality Standards for the water body
Calculated for the “most penalizing”
pollutant
7

8. WII = WSI × [(Vabstr × Qabstr) - (Vreal × Qrea)]
Direct Water Impact
Index
Confidentiel 8
Cotton
Energy
Waste
Indirect Water Impact
Index
WII = WSI × [(Vabstr × Qabstr) - (Vreal × Qrea)]
WII = WSI × [(Vabstr × Qabstr) - (Vreal × Qrea)]
WII = WSI × [(Vabstr × Qabstr) - (Vreal × Qrea)]
8
ASSESSING DIRECT AND INDIRECT WATER IMPACTS

9. CASE STUDY
Milwaukee Water and
Wastewater Systems
• 1.1 million customers in 28
communities in the Greater
Milwaukee Area
• Simultaneous assessment of
the water, carbon and
economic impacts to
understand their
interactions and support
decision-making grounded
in sustainability
9

10. WATER/CARBON ANALYSIS – 1ST CASE STUDY IN
MILWAUKEE
Carbon Economic
• 2 projects:
 Phosphorous removal
 Switch from Cl2 to NH2Cl
Water Impact
Index

11. EFFECT OF IMPROVING PHOSPHOROUS
REMOVAL?
Current situation: concentration of phosphorous in water
discharge: 0.66 mg/l
Potential improvement: concentration of phosphorous in
water discharge: 0.3 mg/l (theoretical)
-0.0018
-0.0016
-0.0014
-0.0012
-0.001
-0.0008
-0.0006
-0.0004
-0.0002
0
[Pt] = 0,66mg/l
(2006-2007
situation)
[Pt] = 0,3 mg/l
(theoretical)
GWIIeq/Gofwastewatertreated
9.3×10-6 WII/G
-0.0007 G WII eq/G
Estimation of Water Impact Index
saving due to improvement of P
removal
-0.0016 G WII eq/G
IncreaseWater
Impact
DecreaseWater
Impact
118
127
0
20
40
60
80
100
120
140
[Pt] = 0,66mg/l
(2006-2007
situation)
[Pt] = 0,3 mg/l
(theoretical)
MgCO2eq/Gofwastewatertreated
Estimation of Carbon Footprint
increase due to improvement of P
removal
+9 mg CO2eq / G
A reduction of phosphorous
concentration in the treated
wastewater discharged into the
Lake Michigan to 0.3mg/l allows
to reduce the Water Impact
Index of the sewage system by
more than 100%...
…and will slighty increase the
Carbon Footprint (around 400
tonnes CO2eq per year) because
of more chemicals and energy
used
11

12. POTENTIAL FUTURE IMPROVEMENT:
CHLORAMINATION PROCESS
Decrease of sodium hypochlorite consumption and
increase of ammonium sulfate consumption (90 days/yr)
0
100
200
300
400
500
600
Current situation Using less sodium
hypchlorite
Using more
ammonium sulphate
Chloramination
kGWIIeq/yr
489
Water Impact Index saving due to Chloramination
-317
172
Chloramination would
reduce the Water Impact
Index of chemicals…
+2
Increase
Water
Impact
Decrease
Water
Impact
0
50
100
150
200
250
300
350
Current situation Using less sodium
hypochloride
Using more
ammonium sulphate
Chloramination
… and the Carbon
Footprint of chemicals,
while generating $
savings
Carbon Footprint saving due to Chloramination
303 -196
117+10
TonnesCO2eq/yr
12

13. CONCLUSION
13

14. A NEW MODEL FOR ASSESSING A COMBINED
CARBON-WATER-ECONOMIC FOOTPRINT
14
Carbon
footprint
Economic
footprint
Water
Impact
Index
VOLUME
• Water Quantity
STRESS
• The Water
Stress Index
QUALITY
• Quality added
by the Water
Impact Index
A platform for awareness and
making Sustainable Decisions

15. MORE INFORMATION
http://growingblue.com/footprint-tools/water-impact-index/
http://www.veoliawaterna.com/sustainable/water-impact-index/

16. Questions
THANK YOU!
Water is H20, hydrogen two parts, oxygen one, but there is also a third
thing that makes water and nobody knows what that is.
D. H. Lawrence (1885-1930), Pansies, 1929