Ero Copper : 2020 Sustainability Report

2 0 2 0 Sustainability Report

Ta b l e o f C o n t e n t s

1. About Ero Copper
2. About This Report

1. 2020 Highlights
2. Message From the CEO

1. Sustainability Governance & Strategy
2. 2021 Sustainability Goals

1. Business Ethics, Human Rights & Diversity

1. Occupational Health & Safety

1. Community Relations & Investments

1. Water

1. Energy & Greenhouse Gas (GHG) Emissions

1. Climate Change
2. Waste & Tailings Management

1. Biodiversity & Mine Closure
2. Global Reporting Initiative (GRI) Tables

1. GRI Index

1. Sustainability Accounting Standards Board (SASB) Data Tables

1. Disclaimer

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A b o u t E ro C o p p e r

Ero Copper is a Canadian, TSX-listed mining company with headquarters in Vancouver, Canada and operations in Brazil.

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C A N A D A

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MCSA Mining Complex

Location: Bahia, Brazil

Ownership: 99.6%

Stage: Operating (over 40 years)

2020 Copper Production: 42,814 t

2020 C1 Cash Costs: US$0.67/lb(*)

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NX Gold Mine

Location: Mato Grosso, Brazil

Ownership: 97.6%

Stage: Operating

2020 Gold Production: 36,830 oz

2020 C1 Cash Costs: US$457/oz(*)

2020 All-in Sustaining Costs: US$628/oz(*)

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Boa Esperança Project

Location: Pará, Brazil

Ownership: 99.6%

Stage: Development

1. Brazil Corporate Office, MCSA (São Paulo)
2. Canada Corporate Office (Vancouver)

B R A Z I L B R A Z I L

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(*) C1 Cash Costs and All-in Sustaining Costs are non-IFRS measure - please refer to our Management Discussion & Analysis for the year ended December 31, 2020 for more information.

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A b o u t Th i s R e p o r t

Ero Copper is committed to responsible mining. Sustainability and economic opportunity are fundamental to the way we do business, ensuring the communities in which we operate, and local stakeholders, continue to thrive well beyond the lifespans of our mining operations.

We are pleased to release our 2nd annual sustainability report. The aim of this report is to provide clear and transparent disclosure on Environmental, Social and Governance ("ESG") topics, building upon our inaugural 2019 sustainability report released in March 2020.

Throughout this report we refer to Ero Copper Corp. and its subsidiaries as "Ero Copper", the "Company", "we", "us" and "our".

Additional Details

Reporting Period	January 1 to December 31, 2020
Report Date	April 13, 2021
Effective Date	December 31, 2020
Date of Last Report	March 31, 2020
	This report contains standard disclosures from the Global Report Initiative (GRI)
Reporting Framework	Sustainability Reporting Standards, prepared largely in accordance with the Core option.
	This report contains select disclosures in alignment with the Sustainability Accounting
	Standards Board ("SASB").
Changes in Reporting	Improved disclosure related to material topics and our overall approach to ESG materiality
as compared to our inaugural 2019 Sustainability Report.
	Data herein has been collected and reviewed internally by operating site management and
	corporate management.
Data and Assurance	Certain economic and performance data has been extracted from our 2020 audited annual
financial statements and management, discussion and analysis for the year ended
	December 31, 2020.
	Data is reported using the metric system and US dollars unless otherwise noted.
	In addition to annual sustainability reporting, operating and financial results are provided
Additional Information	on a quarterly and annual basis, along with further details of exploration and growth-
oriented projects intended to sustain our future business. Our financial statements and
	technical reports are available on our website and SEDAR.
Contact Information	Please direct any sustainability-related comments or questions to [e-mail],
Attention: ESG Team

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ESG Materiality

Our approach to determining materiality as it relates to ESG matters has been anchored through regular engagement with key stakeholders, including, but not limited to, employees, investors, federal and state regulatory agencies, ESG rating agencies and through frequent consultation with members of our local communities. This engagement informs our overall ESG strategy and ensures our efforts are appropriately focused on areas that are most relevant to key stakeholders. It also allows us to better communicate our ESG performance, sustainability goals and to offer transparency as much as possible on key issues.

The table below provides a summary of our engagement approach with key stakeholder groups and the focus areas of each group. This report aims to provide clear and transparent information on our ESG performance, including achievements, goals, risks, opportunities and track record.

We are committed to fostering open communication and mutual trust with our stakeholder group and will continue to enhance ESG disclosure focusing on areas determined to be material. The reporting boundary for each material topic is limited to local operations and local communities.

S t a k e h o l d e r G r o u p	E n g a g e m e n t A p p r o a c h	F o c u s A r e a s
	Active engagement with communities		Local job opportunities
	in and around current, planned and		Sustainable development and
Local Communities	historic mining operations through		continuing education programs
both formal and informal mechanisms.		COVID-19 mitigation and
	See the Community Relations section		management
	of this report for more information		Water Supply
	Formal and informal engagement with		Health and safety, including
	employees and contractors, including:		COVID-19 mitigation and
Employees & Contractors	regular management meetings, health		management
	and safety meetings, annual union		Job security
	engagement and employee
		Salary and benefits
	engagement and satisfaction surveys.
	Regular engagement with all levels of		Tax revenue / transparency
Federal, State and Local	governmental agencies to foster
	Environment and permitting
economic development, community	
Government Agencies
health and environmental stewardship		Jobs / Procurement
	within our regions.
	Frequent engagement with existing		ESG disclosure
		ESG strategy and commitments
Investors	shareholders and potential new
shareholders through marketing,		Climate change
	conferences and targeted outreach.		Tailings management
	Frequent engagement with relevant		ESG disclosure
ESG Research and	ESG focused-agencies to align		ESG relative benchmarking
Company reporting, improve overall
Rating Agencies		ESG strategy & commitments
disclosure and ensure accuracy of
		Performance & goals
	information.

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