Companhia de Saneamento Básico do Estado de São Paulo SABESP : MINUTES OF THE NINE HUNDRED AND FORTY-FIFTH MEETING OF THE BOARD OF DIRECTORS (Form 6-K)

MINUTES OF THE NINE HUNDRED AND FORTY-FIFTH MEETING OF THE
BOARD OF DIRECTORS

On July 13, 2021, from 8:00 a.m. to 1:00 p.m, the undersigned members of the Company's Board of Directors listed below met via video conferencing at the call of the Chairman of the Board of Directors, Mario Engler Pinto Junior, on an extraordinary basis, pursuant to the caput and paragraph 6 of article 13 of the Bylaws of Companhia de Saneamento Básico do Estado de São Paulo - SABESP ('Issuer' or 'Company'), located at Rua Costa Carvalho, nº 300, Pinheiros, in the city and state of São Paulo, to resolve on the agenda below: 'Ratification of the result of the procedure for investment intent collection ('Book Building Procedure') within the scope of the 28th (twenty-eighth) issue of debentures of the Company', based on the Executive Board's Resolution 228/2021, dated 07/12/2021, the Internal Communication 024/2021, dated 07/12/2021, and the Power Point presentation, documents filed at the electronic file of the meeting. Pursuant to paragraph 1 of article 59 of Law 6,404, of December 15, 1976, as amended ('Brazilian Corporation Law'), as per items XIX and XXII of article 14 of the Company's Bylaws, and resolutions of the 942nd Meeting of the Board of Directors, held on June 10, 2021 ('942nd Meeting of the Board of Directors'), the ratification of the Book Building Process carried out on July 12, 2021, under the scope of the 28th issue of simple and unsecured debentures, not convertible into shares, in up to three (3) series for public distribution with restrictive placement efforts, as per Instruction 476 of Brazilian Securities and Exchange Commission ('CVM') of January 16, 2009, as amended ('Debentures', 'Issue' and 'Offering', respectively), was unanimously approved, through which were defined: (i) the number of series of the Issue; (ii) the number of Debentures allocated to each series of the Issue; (iii) the final rate of the First Series Remuneration (as defined below), the Second Series Remuneration (as defined below) and the Third Series Remuneration (as defined below); and (iv) the total amount of the Offering, as specified below:

1. Number of Series: The Issue will be carried out in three (3) series, whereby the number of Debentures allocated in each series of the Issue was defined based on the demand of the Debentures, as calculated on the Book Building Process and according to the Issuer's allocation interest, as per the Indenture. The allocation of the Debentures between the series of the Issue used the communication vessels system, whereby the number of Debentures of any series was deducted from the total number of Debentures, thus limiting the number of Debentures allocated to the other series. The Debentures object of the Offering distributed under the first series are hereinafter referred to as 'First Series Debentures', the Debentures object of the Offering distributed under the second series are hereinafter referred to as 'Second Series Debentures' and the Debentures object of the Offering distributed under the third series are hereinafter referred to as 'Third Series Debentures'.

2. Number of Debentures: A total of one million and two hundred thousand (1,200,000) Debentures will be issued in three (3) series, of which (i) one hundred and twenty-seven thousand and eight hundred (127,800) First Series Debentures; (ii) eight hundred and eighty-eight thousand and two hundred (888,200) Second Series Debentures; and (iii) one hundred and eighty-four thousand (184,000) Third Series Debentures.

3.1 Remuneration of First Series Debentures: First Series Debentures will be entitled to remuneration ('First Series Remuneration') corresponding to one hundred percent (100%) of the accumulated variation of the average daily rate of one-day over extragrupo DI interbank deposits ('DI Rate'), expressed as an annual percentage, based on two hundred and fifty-two (252) Business Days, calculated and disclosed by B3 in the daily bulletin available on its website (http://www.b3.com.br), plus a spread or surcharge of one whole and twenty hundredths percent (1.20%) per year, based on two hundred and fifty-two (252) Business Days. First Series Remuneration will be calculated exponentially and cumulatively pro rata temporis, per Business Days elapsed, on the Face Value (as defined in the Indenture) of First Series Debentures (or balance of the Face Value of First Series Debentures, as applicable), from the First Payment Date (as defined in the Indenture) or the last Payment Date of First Series Remuneration (as defined in the Indenture), as applicable, and paid at the end of each Profitability Period (as defined in the Indenture). The calculation of First Series Remuneration will be carried out according to the formula described in the Indenture.

3.2 Remuneration of Second Series Debentures: Second Series Debentures will be entitled to remuneration ('Second Series Remuneration') corresponding to one hundred percent (100%) of the accumulated variation of the DI Rates, expressed as an annual percentage, based on two hundred and fifty-two (252) Business Days, calculated and disclosed by B3, in the daily bulletin available on its website (http://www.b3.com.br), plus a spread or surcharge of one point forty-four percent (1.44%) per year, based on two hundred and fifty-two (252) Business Days. Second Series Remuneration will be calculated exponentially and cumulatively pro rata temporis, per Business Days elapsed, on the Face Value of Second Series Debentures (or balance of the Face Value of Second Series Debentures, as applicable), from the First Payment Date or the last Payment Date of Remuneration of Second Series Debentures, as applicable, and paid at the end of each Profitability Period. The calculation of Second Series Remuneration will be carried out according to the formula described in the Indenture.

3.3 Remuneration of Third Series Debentures: Third Series Debentures will be entitled to remuneration ('Third Series Remuneration') corresponding to one hundred percent (100%) of the accumulated variation of the DI Rates, expressed as an annual percentage, based on two hundred and fifty-two (252) Business Days, calculated and disclosed by B3, in the daily bulletin available on its website (http://www.b3.com.br), plus a spread or surcharge of one point sixty percent (1.60%) per year, based on two hundred and fifty-two (252) Business Days. Third Series Remuneration will be calculated exponentially and cumulatively pro rata temporis, per Business Days elapsed, on the Face Value of Third Series Debentures (or balance of the Face Value of Third Series Debentures, as applicable), from the First Payment Date or the last Payment Date of Remuneration of Third Series Debentures, as applicable, and paid at the end of each Profitability Period. The calculation of Third Series Remuneration will be carried out according to the formula described in the Indenture.

4. Total Issue Amount: The total Issue amount will be one billion and two hundred million reais (R$1,200,000,000.00) on the Issue Date (as defined in the Indenture).

The Board of Directors ratified all the other terms and conditions related to the Issue, as approved on the resolutions of the 942th Meeting of the Board of Directors, and included in the 'Indenture of the 28th Issue of Simple and Unsecured Debentures, Not Convertible into Shares, in up to Three Series, for Public Distribution, of Companhia de Saneamento Básico do Estado de São Paulo - SABESP' ('Indenture'), as well as all acts related to the Issue that may have been previously taken by the Executive Board. The Board of Directors also ratified the authorization for the Company's Executive Board to negotiate and execute the amendment to the Indenture that will indicate the result of the Book Building Process, as well as to take all the other measures necessary for this purpose.

After the floor was opened and there were no other pronouncements, the Chairman, Mario Engler Pinto Junior, adjourned the meeting for the drawing up of these minutes, which were read, found to be in compliance, signed by me, Marialve de Sousa Martins, Executive Secretary of the Board of Directors, and by the following attending Board members: MARIO ENGLER PINTO JUNIOR, BENEDITO PINTO FERREIRA BRAGA JUNIOR, CLAUDIA POLTO DA CUNHA, EDUARDO DE FREITAS TEIXEIRA, FRANCISCO LUIZ SIBUT GOMIDE, FRANCISCO VIDAL LUNA, LUIS EDUARDO ALVES DE ASSIS, REINALDO GUERREIRO, WALTER LUIS BERNARDES ALBERTONI and WILSON NEWTON DE MELLO NETO.

This is a free English translation of the minutes drawn up in the Book of Minutes of the Company's Board of Directors.

São Paulo, July 13, 2021.

Mario Engler Pinto Junior

Chairman of the Board of Directors

Marialve de Sousa Martins

Secretary of the Board of Directors