Pearson Accountability Alliance

Overview of the GTAA’s official noise monitoring system versus what communities actually experience, including gaps in uptime, siting, and public disclosure of raw data.

Night-time event record from Acacia Park, documenting repeated high-decibel overflights, monitor outages, and discrepancies between lived experience and official summaries.

Walkthrough of the GTAA and NAV CANADA complaint systems, showing how interface design and process barriers frustrate residents and bury patterns of harm.

Core explainer on the GTAA’s night-flight quota system, showing how a seemingly capped budget is used to justify steady growth in overnight movements.

Detailed breakdown of how the night-flight budget is calculated, highlighting the levers that allow movements to grow while still appearing “within” the published quota.

Comparison between the published night-flight budget and actual 2025 operations, showing how the system behaves under real-world load.

Community-documented go-arounds at Pearson in 2025, with tables, screenshots, and narrative evidence of how high-workload events cluster over the same neighbourhoods.

Day-by-day evidence showing how runway choices in January 2026 diverged from the “it’s just the wind” narrative, using surface winds, traffic levels, and flight paths.

Analysis of how “the wind made us do it” is used as a catch-all justification for runway configurations, and what Environment Canada data actually show.

Structured surface wind record for Pearson, used to test claims about crosswinds, tailwinds, and the inevitability of east–west operations over the same communities.

Summary of WHO night-noise guidelines and key studies, highlighting the decibel levels where sleep disturbance, cardiovascular risk, and other harms become measurable.

Key findings from Toronto Public Health on aircraft noise and health, and how those findings sit beside ongoing expansion at Pearson.

Record of submissions to municipal, provincial, and federal health authorities, and how ministries responded (or failed to respond) to evidence of health harms.

Evidence from a local community meeting documenting residents’ sleep disruption, stress, and loss of quiet enjoyment under Pearson’s flight paths.

Index of federal and provincial access-to-information files, together with complaints to the Information Commissioner and other oversight bodies.

Case study of how a watchdog body accepted a narrow ministry narrative and failed to address broader environmental and health harms.

Documentation of how Ontario’s environment ministry framed Pearson as “federal” to avoid engaging with real-world environmental and health impacts.

Record of warnings sent to municipalities and regions about outdated NEF contours and the planning decisions being made on the back of obsolete forecasts.

Evidence record on Canada’s NEF-based noise system, showing how outdated contours mask real exposure and distort planning decisions.

Analysis of health, housing, municipal-service and infrastructure costs offloaded onto communities while Pearson and its partners frame growth as a net public benefit.

Evidence on how Pearson’s operations and official metrics sort neighbourhoods into winners and losers in terms of noise, air quality, and property values.

Deconstruction of the “mandate to fulfill demand” line used to justify endless growth, and what Canada’s legal framework actually says.

Examination of whose choices and incentives actually generate “demand” at Pearson, and how those choices intersect with public costs and risks.

Evidence file on how Parliament received and amplified misleading statements about Pearson, and the consequences for affected communities.

Long-form open letter connecting the evidence record to federal responsibilities, outlining concrete ways out of the current governance failure.

Evidence on the fiscal side of Pearson’s expansion — who pays, who benefits, and how risk is socialized while profit is privatized.