Established in 1995, the Source Testing Association (STA) is a non-profit organisation dedicated to supporting the emission monitoring industry. Our diverse corporate membership spans process operators, regulators, equipment suppliers, and test laboratories, with growing international engagement.

Open to any organisation with an interest in emissions monitoring, the STA aims to advance the science and practice of emissions testing while upholding high standards of professionalism and service. Our core objectives include contributing to industry standards, promoting professional development, fostering ethical conduct, and facilitating collaboration across sectors.

Member organisations benefit from access to expert technical support, regulatory liaison, training opportunities, knowledge sharing, and representation on standards committees — all available to every employee within a member company.

Together, we are shaping the future of emission monitoring through shared knowledge, integrity, and innovation.