Switching from cooling to heating? IAQ issues like dust, airflow changes, and low humidity can surface quickly. Use our Fall IAQ Maintenance Checklist to stay ahead of complaints and maintain comfort this season. tharris.ca/fall-iaq-maintena…

Raccoon contamination can introduce serious health and IAQ risks inside buildings. Learn how to address it safely: tharris.ca/raccoon-contamina…

Please be advised that our offices will be closed today, October 12th, 2026. We will be back tomorrow at 9:00 am! --- Veuillez noter que nos bureaux seront fermés aujourd’hui, le 12 octobre 2026. Nous serons de retour demain à 9 h !

IAQ issues often show early warning signs like complaints, odours, or discomfort. Learn how to recognize and address them: tharris.ca/tips-from-our-con…

New Class A supply in Toronto is tightening, creating a narrow window for Class B and B+ buildings to reposition. With discounted Class A space increasing competition, cosmetic upgrades alone are not enough. Read more: tharris.ca/the-flight-to-qua…

Trees can play a role in contaminated site remediation through phytoremediation. Learn when this approach makes sense: tharris.ca/trees-for-contami…

John Fisher of @THarrisEnviro shares lessons on leadership, inclusion, disability and succession. Read his #ReachSuccess interview: iwscc.ca/interview-t-harris-…

School boards are already planning facility work and summer 2027 projects. THEM supports boards across Ontario with asbestos, IAQ, designated substances, and water testing. Early planning helps with scheduling and compliance. tharris.ca/contact/

Chemical exposure is rarely limited to one substance. Mixtures require careful evaluation. See how this case study approached risk assessment: tharris.ca/case-study-1-eval…

Radon is invisible, odorless, and a serious indoor air risk if left untested. Learn how to identify and address radon exposure: tharris.ca/evict-radon/

Please be advised that our offices will be closed today, September 7th, 2026. We will be back tomorrow at 9:00 am! --- Veuillez noter que nos bureaux seront fermés aujourd’hui, le 7 septembre 2026. Nous serons de retour demain à 9 h !

Indoor air quality directly impacts guest experience in hospitality settings.Learn how to manage IAQ and reduce complaints: tharris.ca/indoor-air-qualit…

NPRI reporting is more complex than it seems. Thresholds, tracking, and accuracy all matter. Understand your reporting obligations: tharris.ca/national-pollutan…

Construction sites are high-risk environments that require clear roles, strong safety practices, and proper planning. Ontario Regulation 213/91 sets the standard for protecting workers and maintaining compliance on project sites. Read more: tharris.ca/ontario-regulatio…

Indoor air quality requires ongoing management. Without it, issues can develop before they are visible.Learn how to manage IAQ effectively: tharris.ca/indoor-air-qualit…

Water damage can quickly lead to mould, IAQ issues, and costly repairs if not handled properly. Learn how to respond effectively: tharris.ca/address-water-dam…

Please be advised that our offices will be closed today, August 3rd, 2026. We will be back tomorrow at 9:00 am!

Underground storage tanks can create hidden environmental and financial risks if not identified early. Learn how to detect and manage UST risks: tharris.ca/find-underground-…