Companhia de Saneamento Básico do Estado de São Paulo SABESP : Departure of Certain Officers - Form 6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 6-K

REPORT OF FOREIGN ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16 OF THE

SECURITIES EXCHANGE ACT OF 1934

For December, 2021

(Commission File No. 1-31317)

Companhia de Saneamento Básico do Estado de São Paulo - SABESP

(Exact name of registrant as specified in its charter)

Basic Sanitation Company of the State of Sao Paulo - SABESP

(Translation of Registrant's name into English)

Rua Costa Carvalho, 300
São Paulo, S.P., 05429-900
Federative Republic of Brazil

(Address of Registrant's principal executive offices)

Indicate by check mark whether the registrant files or will file
annual reports under cover Form 20-F or Form 40-F.

Form 20-F ___X___ Form 40-F ______

Indicate by check mark if the registrant is submitting the Form 6-K
in paper as permitted by Regulation S-T Rule 101(b)(1)__.

Indicate by check mark if the registrant is submitting the Form 6-K
in paper as permitted by Regulation S-T Rule 101(b)(7)__.

Indicate by check mark whether the registrant by furnishing the
information contained in this Form is also thereby furnishing the
information to the Commission pursuant to Rule 12g3-2(b) under
the Securities Exchange Act of 1934.

Yes ______ No ___X___

If "Yes" is marked, indicated below the file number assigned to the
registrant in connection with Rule 12g3-2(b):

Companhia de Saneamento Básico do Estado de São Paulo - Sabesp Board of Directors

COMPANHIA DE SANEAMENTO BÁSICO DO ESTADO DE SÃO PAULO - SABESP

Corporate Taxpayer's ID (CNPJ): 43.776.517/0001-80

Company Registry (NIRE): 35.3000.1683-1

EXCERPT OF THE NINE HUNDRED AND FIFTY-EIGHTH MEETING OF THE
BOARD OF DIRECTORS

On December 16, 2021, at 9:00 a.m., the undersigned members of the Company's Board of Directors listed below met via video conferencing at the call of the Chair of the Board of Directors, Mario Engler Pinto Junior, on an ordinary basis, according to the main section and paragraph 6 of article 13 of the Bylaws of Companhia de Saneamento Básico do Estado de São Paulo - SABESP ("Company"), located at Rua Costa Carvalho, n° 300, Pinheiros, in the city and state of São Paulo, to resolve on the agenda below:

(...)

Continuing with the agenda, the Chair of the Board of Directors moved on to item 7 "Approval of the revision of the Board of Directors' Internal Charter"(time: 25'). Based on the material previously made available to the Board members, filed on the electronic file of this meeting, the Board of Directors analyzed the matter and approved, according to item XXVI of article 14 of the Company's Bylaws, the Board of Directors' Internal Charter, recording the dissenting vote of the Board member Walter Albertoni only regarding the changes to the main section of article 26, and paragraph 5 of article 15.

(...)

Minutes signed by the following members of the Board of Directors: Mario Engler Pinto Junior, Benedito Pinto Ferreira Braga Junior, Claudia Polto da Cunha, Eduardo de Freitas Teixeira, Francisco Luiz Sibut Gomide, Francisco Vidal Luna, Leonardo Augusto de Andrade Barbosa, Luís Eduardo Alves de Assis, Walter Luís Bernardes Albertoni, and Wilson Newton de Mello Neto.

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

São Paulo, December 22, 2021.

Mario Engler Pinto Junior	Marialve de Sousa Martins
Chair of the Board of Directors	Secretary of the Board of Directors

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, in the city São Paulo, Brazil.

Date: December 29, 2021

Companhia de Saneamento Básico do Estado de São Paulo - SABESP
By:	/s/ Osvaldo Garcia
	Name: Osvaldo Garcia Title: Chief Financial Officer and Investor Relations Officer

FORWARD-LOOKING STATEMENTS

This press release may contain forward-looking statements. These statements are statements that are not historical facts, and are based on management's current view and estimates of future economic circumstances, industry conditions, company performance and financial results. The words "anticipates", "believes", "estimates", "expects", "plans" and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements regarding the declaration or payment of dividends, the implementation of principal operating and financing strategies and capital expenditure plans, the direction of future operations and the factors or trends affecting financial condition, liquidity or results of operations are examples of forward-looking statements. Such statements reflect the current views of management and are subject to a number of risks and uncertainties. There is no guarantee that the expected events, trends or results will actually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations.