History & About the PHES ODM Project

In response to the global health crisis brought about by the Covid-19 pandemic, wastewater-based surveillance emerged as a pivotal tool for tracking the spread of the virus. The global adoption of wastewater-based surveillance reflects its strength, such as its capacity to shed light on the spatiotemporal progression of diseases without being influenced by the accessibility of clinical testing or the health-seeking tendencies of populations. Yet, its rapid uptake introduced new challenges, chiefly, a lack of standardized, interoperable data.

Recognizing this gap, the PHES ODM was conceived at the intersection of this global need. Originating in Canada, it emerged from a partnership between prominent academic labs: the Delatolla Research Laboratory at the University of Ottawa, the Vanrolleghem Laboratory at Université Laval, and Dr. Doug Manuel at the Ottawa Hospital Research Institute. Notably, the Public Health Agency of Canada and the Ontario Wastewater Surveillance Initiative were key collaborators in its inception. As an open, collaborative, multidiscipline initiative, it soon garnered international traction, bringing together laboratories and budding surveillance programs to understand and standardize methods of collecting and using wastewater data.

With the vision to "make the collection and use of robust, interoperable data as easy as possible," the ODM was devised. The inaugural edition of the ODM integrated insights and collaborations from over 50 surveillance programs and testing laboratories from across the globe. The primary goal was to establish a comprehensive data model, with a dictionary encompassing all identified surveillance programs, dictionaries, and datasets. Beyond a data model, the ODM collaborators envisioned a supporting data pipeline 'toolkit' to facilitate data collection, validation, storage, and sharing.

Acknowledging our Peers & the Greater Wastewater Data Community

The PHES-ODM is an open, collaborative project, and has been from the start. The advancements that happened during the pandemic, and the speed with which they were they were achieved, were only possible because of open collaborations between projects, disciplines, and researchers. As a project born out of that ecosystem, we are grateful for our peers, other researchers, and data models who have helped to build and define this landscape. Notably, the United States Centres for Disease Control's National Wastewater Sentinel System (USCDC NWSS), the European Nucleotide Association (ENA), the Public Health Alliance for Genomic Epidemiology (PHA4GE), the National Center for Biotechnology Information (NCBI), and national, regional, and academic laboratories. Others have made tremendous contributions to this field. Through their work either with us, or which they've shared freely, we have been able to build the PHES-ODM and build toward more interoperable data. None of this work would have been possible without this community.

Principles

Open Science, Open Source, and Community Initiative

The ODM is committed to the principles of open science and open software, and is built as a community initiative by and for wastewater surveillance teams and researchers. We strive to follow best-practices, as determined by the larger community, and seek to build collaboration and cooperation.

Open science

The purpose of the ODM is to support wastewater and environmental surveillance and epidemiology by facilitating the collection, standardization, transparency, and interoperability of data.

Open source, community initiative

  • To ensure that the voices of the wider community are heard, our work is guided by an international steering committee. Details on the make up of the committee can be found on our GitHub
  • We have an open-door policy and a standing invitation for collaboration to anyone interested. Contacting us by email, generating issues or pull-requests on GitHub, and posting on the Discourse page are all ways to get involved
  • We have regular meetings with multiple stakeholders​, from various levels and institutions
  • Any measures (or part) that is requested can be added to the model - within reason. Simply reach out to make a request.

Email our team at phesd_odm@ohri.ca to get in touch, or contribute on the Discourse or GitHub to get started.

What is the PHES-ODM?

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Data models are representations of real-world processes through data elements and relationships. The PHES-ODM is such a model for wastewater and environmental surveillance data.

Data tables and dictionary

At the core of a data model are data tables that represent real-world 'entities'. On the right is a diagram of the PHES-ODM data entities of environmental surveillance. The key data recorded in PHES-ODM is a measure, defined as a measurement or observation of any biological, physical or chemical substance. The coloured lines in the diagram represent how measures can be taken as a representation of a polygon or geographic area (blue line, e.g. a city population or weather condition), site (orange line, e.g. a wastewater treatment plant sewage flow rate), or sample (green line, e.g. SARS-CoV-2 PCR measurement).

Metadata

It is important to also record contextual information and metadata about the various entities (sites, polygons, samples, etc.). This model also records contact information, organizational information, address information, and other metadata, and links it to the relevant entities.

Road Map

Summer 2021 - Winter 2022
PHES ODM V1
Adoption of the PHES-ODM by the European Commission Joint Research Council
Launch Version 1 of the PHES-ODM
Adoption of the PHES-ODM by the Ontario Ministry of the Environment, Conservation, and Parks
Launch Version 1.1 of the PHES-ODM
Adoption of the PHES-ODM by the Public Health Agency of Canada
Spring 2023 - Spring 2024
PHES ODM V2
Launch of Version 2.0 of the PHES-ODM
Release of the validation Python Library
Release of airport surveillance templates
Release of version 2 templates
Launch of Version 2.1 of the PHES-ODM
Launch of version 2.2 of the PHES-ODM
Release of preliminary data conversion tools for version 2 of the PHES-ODM
Release of the Data Validation Web Application
Release of sharing library for version 2 of the PHES-ODM