1. Conference Call 1Q14 Results May/2014
Economic-Financial Office and Investor Relations Office

2. Notice
This presentation may contain forward-looking statements referring to SABESP’s business outlook. operating and financial results estimates. and growth prospects. These are only projections. and as such. they are exclusively based on SABESP’s management expectation in relation to the future of business and its continuous access to capital to finance the Company’s business plan. These forward-looking statements largely depend on changes in market conditions. governmental rules. industry performance and the Brazilian economy. amongst other factors. in addition to risks exhibited in disclosure documents filed by SABESP. Therefore. they are subject to changes without prior notice. 2

3. Total water and sewage billed volume, including wholesale (million m³)
5.2%
923.9
968.7
5.5%
4.9% 3

4. Financial Highligts (R$ million)4

5. Costs and Expenses (R$ million)
Costs and expenses in 1Q13*: R$1,432.6
Costs and expenses in 1Q14*: R$1.515,5
5.8%
7.6%
*Not including construction costs
37.6%
33.3%
(29.1%)
(3.3%)
7.4%
6.3%
(60.7%)
(50.9%)
% Net Revenue in 1Q13
17.5%
1.7%
2.5%
8.6%
5.5%
8.1%
7.4%
1.4%
1.5%
% Net Revenue in 1Q14
17.8%
11.3%
5.0%
9.3%
0.5%
0.7% 5

6. Net Income – Main variations6

7. Cantareira System (oct/13 apr/14)
As of May 16, 2014 7

8. Technical Reserve 8 Entrance 30.5 m height Depth Discharge Tunnel
10 Floor Building
Entrance
Depth
Discharge
Useful Volume
Tunnel
Volume Available
PCJ Rivers
Technical Reserve
RMSP Supply 8

9. The Path of the Waters
Cantareira System 9

10. Consumers served by the Cantareira System
Bonus Program
Bonus Program
20% water bill savings = 30% discount on water and sewage bill
Scope:
Since February  consumers served by the Cantareira System
Since April  all consumers directly served in the SPMR
Bonus Program Balance
Consumers served by the Cantareira System
In April
In March
Reached the Bonus
Reduced Consumption
Increased
Consumption
Reached the Bonus
Reduced Consumption
Increased
Consumption 10

11. www.sabesp.com.br IR Contacts
Mario Azevedo de Arruda Sampaio Angela Beatriz Airoldi
(55 11) (55 11)