Secretariat of the Pacific Regional Environment Programme (SPREP)

Strengthening Environmental Impact Assessment: Guidelines for Pacific Island Countries and Territories (2016)
These guidelines contain information about the impact assessment process, recommendations for a successful EIA process, and some toolkits for risk assessment and reporting. 
Environmental Impact Assessment Guidelines for Coastal Tourism Development in Pacific Island Countries and Territories (2018)
SPREP partnered with the South Pacific Tourism Organisation to produce these sector-specific guidelines to ensure beneficial outcomes from coastal tourism developments. 

International Association for Impact Assessment (IAIA)

Social Impact Assessment: Guidance for assessing and managing the social impacts of projects (2015)
The purpose of this Guidance Note is to provide advice to various stakeholders about what is expected in good practice social impact assessment (SIA) and social impact management processes, especially in relation to project development. ​
Guiding Principles for Air Quality Assessment Components of Environmental Impact Assessments (2017)
As a biophysical effect, impacts on air quality (AQ) are a central focus of many EIAs where significant air contaminants may be emitted from the proposed development; resultant studies are termed “air quality impact assessments,” or AQIAs. The scope of this document covers the prediction of resultant air quality levels—it does not include human health or ecological impact assessments, which themselves take input from the results of the AQIA.

United Nations Environment Programme (UNEP)

Environmental Impact Assessment and Strategic Environmental Assessment: Towards an Integrated Approach (2004) 
This report provides information and guidance on Environmental Impact Assessment (EIA) and Strategic Environmental Assessment (SEA) good practice. It is intended as a resource for those who are involved in EIA/SEA practice, training and professional development. 
Assessing Environmental Impacts - A Global Review of Legislation (2018) 
This report provides an overview of the current status of national legislation and institutional arrangements of relevance to Environmental Impact Asssessments (EIAs) and Strategic Environmental Assessments (SEAs) across the globe. It does this primarily through providing examples from a wide selection of countries of their EIA/SEA arrangements and in relation to the different steps of the EIA/SEA processes. 
Sourcebook on the Integration of Natural Hazards in the Environmental Impact Assessment Process (2004) 
Initiated by the Caribbean Development Bank and the Caribbean Community Secretariat, the Sourcebook is intended to be a compilation of current and appropriate mechanisms for assessing, within EIA, the potential interaction between a proposed project and natural hazards. 
Case Study: Integrated Strategic Environmental Assessment in post-earthquake Nepal 2015-2017 
ISEA is a tool that can be used both as a high level, long-term planning tool and also to fast track development in a post-conflict and post disaster situation while integrating conservation of environment and sustainable development with disaster and climate risk reduction. ​This lessons learnt report covers Nepal’s experience with ISEAs as an integrated approach to post-disaster/ post-crisis sustainable development planning with a focus on the road sector. 

Food and Agriculture Organization of the United Nations (FAO) 

​Environmental Impact Assessment: Guidelines for FAO Field Projects (2012) 
This publication covers:
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• guidance to FAO staff on the application of EIA to field projects;
• procedures to be used in formulating and screening projects;
• FAO’s standards for related documenting and reporting formats;
​• roles and responsibilities in conducting EIA to ensure effective implementation.
Environmental Impact Assessment and Monitoring in Aquaculture: requirements, practices, effectiveness and improvements (2009) 
The report includes four regional review papers on EIA and monitoring in aquaculture in Africa, Asia-Pacific, Europe, Latin America and North America, a special study on EIA as applied to salmon aquaculture, as well as a global review and synthesis report which draw on the findings of the review papers, covering relevant information from more than 35 countries.
Nutrient Flows and Associated Environmental Impacts in Livestock Supply Chains - Guidelines for Assessment (2018) 
The methodology in this report strives to increase understanding of nutrient use efficiency and associated environmental impacts and to facilitate improvement of livestock systems’ environmental performance. These guidelines are a product of the Livestock Environmental Assessment and Performance (LEAP) Partnership. 

International Finance Corporation / World Bank (IFC)

Cumulative Impact Assessment and Management: Guidance for the Private Sector in Emerging Markets (2013) 
​One of the biggest risk management challenges currently facing project developers in emerging markets is the appropriate assessment and management of cumulative impacts and risks. This Good Practice Handbook will assist developers to identify their contribution to cumulative impacts and guide them in the effective design and implementation of measures to manage such cumulative effects. 
Hydropower Environmental Impact Assessment Manual (2018) 
Produced by the government of Nepal, this manual is intended to help EIA practitioners and hydropower developers in streamlining, identifying and managing environmental and social risks and impacts, while maximizing development benefits and gaining greater acceptance of projects by local communities and Governments.. 
Introduction to Health Impact Assessment (2009)
​This document is intended to provide good practice guidance for conducting a health impact assessment (HIA) to determine potential impacts on community health as a result of project development.