Peel Region develops a Wastewater Integrated Management System

By Sarah Vella

Since 2018, Peel Region has undertaken a progressive and internally driven journey to design, implement and maintain a Wastewater Integrated Management System (WWIMS) across its wastewater operations. Peel owns the wastewater collection and treatment system that serves its 1.6 million residents, as well as local businesses.

The WWIMS initiative marked a deliberate move toward formalizing environmental protection and quality assurance practices in a sector where such systems are not mandated in the same way as drinking water. By aligning with globally recognized frameworks, such as ISO 14001 and ISO 9001, Peel established a structured, risk-based management system that emphasizes consistency, accountability, and continuous improvement.

The WWIMS was developed entirely in-house by Peel staff, reflecting a high level of technical capability, operational knowledge, and organizational ownership. In response, program resources added two additional staff, who now form part of Peel’s water and wastewater regulatory compliance team.

From its early stages, the program has been supported at senior levels, with Regional Council informed of its implementation and ongoing operation. Importantly, the system has been formally endorsed by the public works commissioner, the general manager and directors and council, which reinforces its legitimacy and ensures alignment with broader organizational priorities. This leadership commitment has been essential in advancing a program that is not regulatory-driven, but instead rooted in best practice and due diligence.

A dedicated team of approximately seven staff currently manage both the WWIMS and the Drinking Water Quality Management System (DWQMS). Over time, these programs have become increasingly integrated, including the implementation of a single internal audit process that evaluates both systems simultaneously.

This integration has strengthened cross-functional collaboration, improved operational efficiency, as well as reduced cost and duplication. It also ensures consistent governance across water and wastewater services.

Peel Region has also laid the groundwork and expectations for the Ontario Clean Water Agency to adopt a similar WWIMS framework, as this agency operates the Region’s Clarkson and G.E. Booth Water Resource Recovery Facilities. This alignment ensures that contracted operations will uphold Peel’s standards for quality, environmental protection, and continuous improvement. Ultimately, this will create a more unified and consistent service delivery model across all wastewater assets.

A key strength of Peel’s WWIMS is its clearly defined commitment to environmental protection, operational excellence, and stakeholder engagement. At its core, the system reflects the commitment to protecting the environment by proactively managing risks associated with wastewater collection and treatment.

This includes identifying potential threats to receiving waters and implementing preventative controls to mitigate impacts before they occur. The program also emphasizes the importance of quickly addressing issues that pose a risk to environmental or public health. Through structured incident response processes and continuous monitoring, Peel ensures that emerging risks are identified early and managed effectively.

In addition, Peel maintains a strong commitment to regulatory compliance. While the WWIMS itself is not mandated, it supports and reinforces adherence to all applicable legislation, approvals, and environmental obligations. This ensures that operations consistently meet, or extend, beyond regulatory expectations. This commitment is complemented by a collaborative approach to stakeholder engagement, involving internal staff, contractors, regulators and the public. Engagement and communication are recognized as critical components of successful wastewater management, particularly in building trust and maintaining transparency.

Continuous improvement is a fundamental element of the WWIMS. Through regular audits, management reviews, and performance evaluations, Peel actively identifies opportunities to enhance processes, infrastructure, and service delivery. This commitment ensures that the system remains dynamic and adaptive to changing conditions, emerging risks, and evolving industry practices.

Challenges

Despite its successes, the development and implementation journey has not been without challenges. One of the primary obstacles was introducing a voluntary (non-mandated) management system into an operational environment already subject to extensive regulatory oversight. Building internal buy-in required demonstrating the value of WWIMS in terms of risk reduction, promoting operational consistency, and long-term sustainability.

Another significant challenge involved developing and maintaining comprehensive document control across all aspects of the system. This was needed to ensure that procedures, records, and operational documents were accurate, accessible, and consistently applied, which required effort and coordination.

Differing perspectives also emerged throughout the development process, particularly around system scope, implementation strategies, and the appropriate level of formality required. Additionally, Peel faced a strategic decision regarding whether to pursue third-party certification to ISO standards, or to self-declare conformity. This decision involved factors such as cost, administrative effort, and the level of external validation required.

Looking Forward

The introduction of CSA W217:25, Ontario wastewater management system, is not expected to significantly impact Peel’s WWIMS. The principles outlined in this standard closely align with the existing framework under ISO 14001 and ISO 9001. This puts Peel in a good position and will minimize the need for system adjustments.

The current scope of Peel’s WWIMS begins at the commissioning stage of wastewater assets and does not formally include capital planning and construction phases. This approach has enabled a strong focus on operational performance and system reliability.

Although this aligns well with the scope of the new CSA standard’s focus on wastewater operations, Peel is working toward expanding the range of the WWIMS to encompass system upgrades planning and construction. This evolution will support a more comprehensive lifecycle management approach, strengthen risk mitigation from project inception through to operations, and further enhance consistency across wastewater services.

In doing so, Peel’s framework may extend beyond the scope outlined in CSA W217:25, reflecting the Region’s commitment to continuous improvement and leadership in wastewater management.

Conclusion

Peel Region’s Wastewater Integrated Management System journey demonstrates leadership, innovation, and a strong commitment to environmental stewardship. By proactively implementing a structured management system, Peel has strengthened its ability to protect the environment, manage and respond to risks, comply with regulations, collaborate with stakeholders, and continuously improve wastewater service delivery.

Sarah Vella is Supervisor, Water & Wastewater Programs Quality Assurance at the Region of Peel. For more information, email: sarah.vella@peelregion.ca

This article appeared in the August 2026 edition of Environmental Science & Engineering Magazine.