1. Conference Call 3Q12 Results November/2012
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)
2.5%
2,632.8
2,699.4
3.1%
3.2%
879.0
907.2
2.1%
3.8%
2.8% 3

4. Financial Highlights 4

5. Costs and Expenses (R$ million)
Costs and expenses in 3Q11: R$ 1,943.1
Costs and expenses in 3Q12: R$ 1,988.6
(8.7%)
2.3%
(0.1%)
6.7%
8.0%
0.6%
7.1%
310.5%
8.5%
4.8%
(7.8%)
% of Net Revenue in 3Q11
16.5%
25.3%
1.6%
1.4%
9.5%
5.6%
7.5%
6.5%
0.7%
0.4%
% of Net Revenue in 3Q12
15.7%
22.1%
1.7%
9.6%
5.3%
7.7%
6.6%
2.6% 5

6. Net Income – Main variations6

7. Long term low, cost funding
Total Debt Breakdown
Total Debt by Currency
(*) Index that measures the variations of the world’s major currencies – type of international currency (IDB 713 agreement)
Debt Amortization Profile
R$ million

8. New Tariff Methodology
BRR0
CAPEX + OPEX + IRCS + ∆ CG
BRRT = BRR0 + ∑(CAPEX+∆ CG-DEP)
Volume (M3)
P0  TIR = WACC
May 18, 2011
ARSESP discloses WACC of 8.06%
Jan 16, 2012
ARSESP’s proposal for tariff review methodology is disclosed.
Feb 29, 2012 to
Mar 14, 2012
Public Hearings are held to discuss the methodology on which the tariff review will be based
Aug 30, 2012
Sabesp submits to ARSESP the Regulatory Asset Base (BRR) and the detailed Business Plan
ARSESP discloses the final methodology on which the tariff review will be based
Nov 13, 2012
ARSESP discloses the proposed preliminary Initial Maximum Average Tariff (P0) and Efficiency Gain Factor (X) and calls for a public hearing
Dec 13, 2012
Public hearing is held to discuss the preliminary Initial Maximum Average Tariff (P0) and the Efficiency Gains Factor (X)
Dec 29, 2012
Tariff Review Results relating to preliminary Initial Maximum Average Tariff (P0) and the Efficiency Gains Factor (X) are disclosed
Apr 30, 2013
SABESP submits its Tariff Structure proposal
Jun 10, 2013
ARSESP calls for a public hearing on the final Maximum Average Tariff (P0), Tariff Structure and tariff values
Jul 12, 2013
Public hearing is held to discuss the final Maximum Average Tariff (P0) and the Tariff Structure
Aug 9, 2013
ARSESP discloses the final Maximum Average Tariff (P0) and the Tariff Structure 8

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