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Reliable Air Quality Testing Toronto, ON

The air around us is filled with various irritants, pollutants, and toxins that can harm your health. If you experience health issues that can’t be easily explained, such as an ongoing cough, nosebleed, or respiratory problems, indoor air quality testing can help identify potential sources of contamination in and around your home. This includes testing for mould, asbestos fibres, and other microscopic particles invisible to the human eye.


For over 30 years, Fisher Engineering Limited has assisted countless clients with air quality testing in Toronto, ON, with various indoor air quality concerns. We’re equipped with cutting-edge technologies to detect and address hazardous materials and contaminants in your home or business.


We specialize in addressing indoor air quality concerns such as mould, asbestos, and other hazardous materials and provide the best solutions to your problem to help you breathe easily again. If you are thinking of calling professionals to test the air quality of your residential or commercial property in Toronto, reach out to our team at Fisher Engineering Limited today.


Further reading:




Mould and disturbed asbestos fibres are two common pollutants that affect indoor air quality, and they can go overlooked for years before anyone notices.


Due to its cheap and fire-resistant properties, asbestos has been used in construction and manufacturing for a long time. However, once the negative health effects of asbestos were discovered, most countries banned it. Asbestos has been banned in Canada since the early 1980s, but its legacy continues to haunt us today.


Disturbed or damaged asbestos fibres easily become airborne and can cause significant health issues if inhaled. Damage to the lungs caused by asbestos fibres can result in physical symptoms such as breathlessness and throat irritation. Prolonged asbestos exposure can cause respiratory diseases and health issues such as asbestosis, mesothelioma – and lung cancer.


Conversely, mould is a natural part of the environment but can also be very dangerous when growing inside a home or business. Since mould needs moisture to survive, mould is often associated with damp buildings or decaying wood. When present indoors, mould can impact indoor air quality by releasing allergens and irritants. Contact with mould can cause respiratory problems like coughing, sneezing, runny nose, sinus congestion, and skin irritation.

It is important to note that mould spores and asbestos fibres are invisible, meaning you can be exposed to them without even realizing it. With the right air quality testing equipment, detecting these harmful particles and ensuring they aren’t present in your home or business is possible.


Call Fisher Engineering Limited if you have any additional questions about our air quality testing services in Toronto, and our team will be happy to assist you.

Further reading:

Common Areas Where Asbestos Can be Found




Most home and commercial property owners tend to neglect air quality testing. However, scheduling a test or inspection with a professional service provider is essential. It is always advised to be vigilant when carrying out any type of work in an environment that could contain asbestos or mould, whether as a homeowner or a tradesman. Determining the presence of these pollutants and other hazardous materials early through air quality testing can help prevent numerous health issues. For that reason, call for our professional air quality testing services and take the necessary steps to ensure that the air you breathe isn’t harmful to your health or the environment. 

Solutions for Unhealthy Materials

Fisher Engineering Limited has identified and worked with hazardous, toxic, and contaminated substances for over three decades. We have the experience, equipment, and expertise to:


  • Evaluate on-site safety.

  • Provide management plans and solutions.

  • Ensure the health and safety of all parties involved by complying with provincial regulations.


Contractors and developers who are keenly aware of health and safety concerns, especially during demolition. If you are involved in renovating older structures with varying building materials that are no longer considered safe, call us! 


Property managers and employers need to ensure the long-term sustainability of structures for their occupants.


Homeowners and renters who find themselves faced with toxic substances. No one is immune from mould growth, especially after a flood and unexpected materials that could be contaminated are uncovered during renovation.

Fisher Engineering Limited is your local source for quick and dependable air quality testing services in Toronto, ON.




Rapid Response

Getting Materials Analyzed

1. We come to you

Our Rapid Response team can come to your site and sample questionable materials safely and effectively, e.g., mould, asbestos, and lead-based paints, to name a few. 

Our Laboratory can provide quick feedback, allowing clients to make real-time adjustments.


2. You can come to us

Our CALA-certified Laboratory can also accept material samples from third-party trained professionals. Simply drop off your samples for lab analysis only.


The Ministry of Labour and The Occupational Health and Safety Act (OHSA) guide regulations. The Act provides a designated toxic substance where its use in the workplace is prohibited, regulated, restricted, limited, or controlled.



Do you have a STOP ORDER from the Labour Board?

Our RAPID RESPONSE team is ready to help you reduce downtime by solving challenges.



TOXIC OR HARMFUL SUBSTANCES unless you are a trained professional.

Our RAPID RESPONSE team is ready to come to you.



We help you identify typical and other suspect materials.

More on setting up a workshop for your team.

fisher file


About Health And Safety: Do You Know Your Role?



Air quality testing in Toronto is the process of testing the quality and components of the air inside and outside our homes and buildings. It is an important process as it helps to improve our daily health and comfort. Air quality tests usually look for pollutants like gases, carbon monoxide, radon, volatile organic compounds, particulate matter, and microbial contaminants like mould or bacteria. Indoor air quality testing is recommended and may be required if you: 


  • Need to comply with local health regulations and standards.

  • Are suffering from allergies, frequent colds, coughs, respiratory problems, and other health issues in a particular space only and not anywhere else. 

  • Suspect the presence of mould due to strange odours and unpleasant smells.

  • Mould was found in any part of a newly purchased property.

Call Us for an Air Quality Investigation (AQI)

Our Air Quality Investigation team has extensive experience dealing with large and small-scale environmental air quality concerns. Everyone, from homeowners to large multi-unit high-rises, turns to Fisher’s expertise in protecting their health and well-being.  


Our team is comprised of experienced chemists, engineers, and technologists who are always ready to help you with: 

  • Investigation and identification

  • Confirmatory samples after completion

  • Monitoring contracts

  • Abatement (removal) supervision

  • Remediation

Our team will provide direct and ongoing support as required with:

  • Investigation into substance contamination
  • Sampling and identification of substance contamination
  • Management plans
  • Complete remediation

Typical Materials:


Carbon Dioxide (CO2), Carbon Monoxide (CO), Temperature (°C), Relative Humidity (RH), Total Volatile Organic Carbons (TVOCs), Lower Explosive Limit (LEL) for Oxygen (O2), Hydrogen Sulfide (H2S), Methane (CH4), Respirable Particulates (RP), Microbial Contamination (Mould) and Asbestos Fiber concentration in the ambient air.



In the fast-paced business landscape of Toronto, ensuring optimal air quality is paramount for both residential and commercial spaces. With the increasing concerns about pollutants, allergens, and airborne contaminants, reliable air quality testing has become crucial.


  • Health and safe environment: Ensuring the air quality in your surroundings is crucial for maintaining a healthy and safe environment. Air quality testing in Toronto by Fisher Engineering Limited allows you to promptly identify and address potential hazards, promoting occupants' well-being.


  • Respiratory health concerns: Poor air quality can lead to respiratory issues aggravating asthma and allergies. Our services help pinpoint pollutants such as mould, allergens, and particulate matter, allowing for targeted mitigation strategies.


  • Regulatory compliance: Meeting air quality standards is essential for regulatory compliance. Fisher Engineering Limited's air quality testing ensures that your property adheres to local regulations, avoiding fines and legal complications.


  • Property value maintenance: Regular air quality assessments contribute to maintaining property values. Proactive testing can prevent long-term damage from pollutants, preserving the integrity of buildings and assets.


  • Occupant comfort: Clean air enhances overall comfort and productivity. By identifying and eliminating pollutants, our testing services create a conducive indoor environment, promoting a sense of well-being among occupants.


Designated Substances

How to deal with Designated Substances

O. Reg. 490/09 provides a consistent approach to dealing with existing requirements and provisions. It outlines steps required to control worker exposure to these substances, including inhalation, ingestion, skin absorption, or skin contact.


Each designated substance has an allowable level of exposure based on a time-weighted average (TWA) limit and may also have a short-term exposure limit (STEL) and/or ceiling limit (C) assigned to it. 


  • TWA refers to the time-weighted average airborne concentration of a biological or chemical agent to which a worker may be exposed in a workday or workweek.
  • STEL refers to the maximum airborne concentration of a biological or chemical agent to which a worker may be exposed in any 15-minute period
  • C refers to the maximum airborne concentration of a biological or chemical agent to which a worker may be exposed at any time. 

Designation is reserved for eleven particularly hazardous substances, covered under Ontario Regulation 490/09 – Designated Substances, implemented on July 1, 2010. 

Formerly, regulations for these substances were passed separately, and each outlined exposure limits where workers were likely to inhale, ingest, and/or absorb the substance.

The big eleven
view of an old pipe
man emptying the content of a bag

 Photo: Historic image of asbestos - containing vermiculite used extensively in the building industry prior to the 1980s(source unknown)

fisher file

Asbestos - A Special Case

The Construction Industry

The control of asbestos exposures in the construction industry has evolved into Ontario Regulation 278/05 – Asbestos on Construction Projects and in Buildings and Repair Operations. It is a supplementary regulation.


The regulation includes a definition of asbestos-containing materials (ACM), requirements for additional training, clearance air testing, procedures for determining materials that meet the definition of ACM and for the use of glove bags, and provisions for varying from the measure and procedures set out in the regulation.

More Regulations

In addition to the OHSA and regulations regarding designated substances, the following regulations, guidelines, and standards are also taken into account and referenced:


  • Ontario Regulation 213/91 - Construction Projects regulated under the OHSA and last amended by O. Reg. 443/09
  • Ontario Regulation 558/00 made under the Ministry of Environment (MOE) Environmental Protection Act, amending Ontario Regulation 347 - General Waste Management
  • The Transport of Dangerous Goods Act (TDGA) provides regulations for the transport of asbestos-containing materials and wastes
  • MOL Guideline: Lead on Construction Projects, 2011
  • MOL Guideline: Silica on Construction Projects, 2011






Chronic exposure to hazardous or toxic substances, such as PCBs, can harm human health. In some cases, acute exposure to hazardous and toxic substances can be fatal. Their proper management and disposal are covered in Federal and Provincial legislations under several Acts and Regulations.

Fisher Engineering Limited has the expertise to work with these hazardous materials. We provide a full range of assessment, sampling, laboratory analysis, and management services.

Typical Materials:


Man-made mineral fibres, ozone-depleting substances (ODS), polychlorinated biphenyls (PCBs), and urea-formaldehyde foam insulation (UFFI). See the list of building materials.

Designated Substance Survey (DSS)

Based on the regulatory requirements, a survey, and report of all Designated Substances, including asbestos, is required:


  • At a workplace where they are present, produced, processed, used, handled, or stored.

  • When a building is undergoing renovations or demolition (before commencement).


The survey identifies designated substances present, their locations, and concentrations. Activities associated with a designated substances building audit include:


  • Identification of designated substances used in and on building materials.

  • Sampling of designated substances and materials using safe procedures.

  • Analysis of bulk samples to determine the type and quantity of substance.

  • A detailed report of findings and recommendations.


Fisher Engineering Limited has extensive experience conducting building audits for designated substances and other hazardous materials for large municipalities down to individual homeowners.



Here are some frequently asked questions regarding air quality testing in Toronto. 


Why is Air Quality Testing Important?

Air quality testing is crucial for assessing the presence of pollutants and allergens in indoor spaces. It helps identify potential health hazards and ensures occupants a safe and healthy environment.


What Services Does Fisher Engineering Limited Offer in Toronto?

Fisher Engineering Limited offers comprehensive air quality testing in Toronto, employing state-of-the-art technology to detect and analyze pollutants. 


How Often Should Air Quality Testing be Conducted?

Regular testing is recommended, especially in areas prone to pollution or for buildings with a known contamination history. Annual or biennial testing can help maintain a consistently healthy indoor environment.


What Are Common Indoor Air Pollutants?

Pollutants include mould spores, dust mites, pet dander, tobacco smoke, and volatile organic carbons (VOCs). Identifying these is crucial for effective mitigation and ensuring clean air.


Can Poor Air Quality Affect Health?

Poor air quality can lead to respiratory issues, allergies, and other health problems. Timely air quality testing can identify and address potential health risks, contributing to a healthier living or working space.


How Long Does the Testing Process Take?

The duration depends on the scope of testing. Generally, it takes a few hours to collect samples, with subsequent analysis. Results are typically available within a few days.


What Measures Can Be Taken to Improve Air Quality?

Fisher Engineering Limited provides recommendations based on test results. Improvements may involve better ventilation, air purifiers, or targeted measures to eliminate specific pollutants.


Is Air Quality Testing Necessary for New Buildings?

Testing is recommended for new constructions to ensure the indoor environment meets health and safety standards. It helps identify potential issues before occupancy.

Read our blogs to learn more about air quality testing.


For inquiries regarding air quality testing in Toronto, contact Fisher Engineering Limited. Our dedicated team is committed to ensuring the air you breathe is of the highest quality. With advanced technology and expertise, we conduct thorough air quality testing to promptly identify and address potential issues. Your well-being is our priority, and we strive to deliver accurate and reliable results. Call us today or visit us to schedule your air quality testing—Trust Fisher Engineering Limited for comprehensive solutions to safeguard your indoor environment.

Breathe a Cleaner, Safer Air

With our efficient air quality testing in Toronto, ON, we can ensure a cleaner environment in your surroundings.







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