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    • Air Quality Testing
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    • Contact Us
    • Verify Air Quality Blog
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    • Air Quality Test Markham
    • Air Test in Mississauga
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    • Office and Home Air Test
    • Toronto Air Quality Test
    • Daily Air Quality Advice
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    • Air Quality Book
    • Mold And Mycotoxin Book

905-208-8887


  • Home
  • Air Quality Testing
  • Mold Inspection
  • Contact Us
  • Verify Air Quality Blog
  • Office Air Test
  • Indoor Air Quality
  • Smoke Damage Testing
  • Mold Library
  • Facts
  • Us in News
  • Air Quality Test Markham
  • Air Test in Mississauga
  • Indoor Air Mississauga
  • Mould Testing Mississauga
  • Mould Testing Markham
  • FAQ Home Air Quality Test
  • FAQ Mould Remediation
  • FAQ Office Air Test
  • Indoor Air Test Markham
  • Office and Home Air Test
  • Toronto Air Quality Test
  • Daily Air Quality Advice
  • Book Checklists
  • Air Quality Book
  • Mold And Mycotoxin Book

Daily Indoor Air Quality Advice

What Is Toronto's Air Quality Today?

If you have seasonal allergies, asthma, respiratory disease, sinus inflammation or just have trouble breathing, check this page daily for updates on outdoor air quality news as well as indoor air quality advice for the City of Toronto and the GTHA.

What's Happening Today?

Thursday October 19, 2023

Change of weather today.  Your indoor air quality for Toronto and GTHA homes will be negatively affected if windows are open today.  Fall allergens are at their peak as well.  

Past Indoor Air Quality Advice

Tuesday October 17, 2023

Tuesday October 17, 2023

Tuesday October 17, 2023

Nice Day Today.  You can open windows.  Book your Indoor Air Quality Test to make sure you're ready for the cold that will come shortly.  Did you know not having the right indoor humidity during heating season can lead to mould growth indoors?

Monday October 16, 2023

Tuesday October 17, 2023

Tuesday October 17, 2023

It's Fall allergy season!  Although airborne particulates are low today, seasonal allergens are fairly moderate to high.  It's a windows closed day today if you don't have the right ventilation and air purification systems to protect your indoor air quality.  Hidden mould growth will create spores today as well as the humidity is a little higher than usual.

Friday October 13, 2023

Tuesday October 17, 2023

Wednesday October 11, 2023

Spooky Friday the 13th!  Overall good Toronto air quality.  However, humidity is still a slight factor that could be leading to indoor mould growth should you have hidden mould in your home.  Call us for a mould assessment.

Wednesday October 11, 2023

Wednesday October 11, 2023

Wednesday October 11, 2023

Nice morning. Fall allergens are in the air mid afternoon so unless you have the proper air purification systems you should close windows are lunch time.  Indoor air quality will be affected by outdoor allergens.

Tuesday October 10, 2023

Wednesday October 11, 2023

Tuesday October 10, 2023

Nice day today.  You can open windows.  Get your furnace ready for heating season as the cold weather is here.  Be careful with hidden mould growth in your home. Now is the time for an indoor environmental assessment of your home.

Friday October 6, 2023

Wednesday October 11, 2023

Tuesday October 10, 2023

Mixed bag of weather today.  For best indoor air quality open windows only periodically. Call us for an indoor air quality assessment and learn how to protect your indoor air all year round.

Thursday October 5, 2023

Wednesday October 4, 2023

Wednesday October 4, 2023

One more day of bad outdoor air.  Keep windows closed until tomorrow and keep your air purification systems on for better indoor air quality.

Wednesday October 4, 2023

Wednesday October 4, 2023

Wednesday October 4, 2023

Bad Air Outside Quality Today means Poor Indoor Air Quality unless you have the right ventilation and air purification.  Also, if you have a hidden source for mould growth, the humidity today will amplify spores indoors. I f you're not feeling well at home...give us call today!

Past Indoor Air Quality Advice

Tuesday October 3, 2023

Monday September 25, 2023

Tuesday October 3, 2023

Warm weather continues in Southern Ontario.  Keep the windows closed and AC on. Lots of particles and allergens in the air today including a rise in mould spore activity which will affect the indoor air quality in Toronto.

Monday October 2, 2023

Monday September 25, 2023

Tuesday October 3, 2023

Warm weather Toronto.  Fall allergens in full swing that will affect your indoor air.  Keep windows closed later this morning.  Call us for an indoor air quality assessment to find out how to get better indoor air quality this Fall.

Monday September 25, 2023

Monday September 25, 2023

Thursday September 21, 2023

Seasonal Allergies are on the rise.  If you don't have central ventilation and air purification in your home, you can only open your windows periodically today.  For best indoor air quality, call us for an assessment.

Thursday September 21, 2023

Thursday September 21, 2023

Thursday September 21, 2023

Time to watch for Fall outdoor allergens and moulds.  Windows should close late morning.  Run your HRV/ERV ventilation systems as well as your air purification systems this afternoon and evening to get better breathable indoor air quality.  Book an indoor air quality test to make sure your are doing everything you can to have good indoor air quality.

Tuesday September 19, 2023

Thursday September 21, 2023

Tuesday September 19, 2023

Great Day Today. Feel free to open your windows.  Your indoor air quality should be good today.

Monday September 18, 2023

Thursday September 21, 2023

Tuesday September 19, 2023

Happy Monday. Bit of a mixed bag today.  If you don't have a ventilation system for your home you can open windows this morning, there may be some allergens this afternoon.  Run your air purifiers on medium to high this afternoon for better indoor air quality.

Thursday September 14, 2023

Wednesday September 13, 2023

Wednesday September 13, 2023

Happy Thursday.  The air quality in Toronto is good from a particulate point of view, but seasonal allergens are on the rise.  Intermittent opening of windows is recommended for homes without ventilation systems.  Homes with ventilation systems can keep them closed and set the fan speed to medium.   Air purification systems should be on medium to high today for optimal indoor air quality.

Wednesday September 13, 2023

Wednesday September 13, 2023

Wednesday September 13, 2023

Hump Day!  Toronto and the GTHA is blessed with a fresher feel.  You should have good indoor air quality today as long as you don't have indoor issues like mould growth.  Ensure your heating system is ready for the colder months.  Call us for an indoor air quality and mould assessment today.

Tuesday September 12, 2023

Wednesday September 13, 2023

Tuesday September 12, 2023

Open the windows today. Good air quality.

Monday September 11, 2023

Thursday September 7, 2023

Tuesday September 12, 2023

Happy Monday Toronto. Good Indoor Air Quality today, open windows and give the AC a break.  Keep indoor humidity controlled in the basement.

Friday September 8, 2023

Thursday September 7, 2023

Thursday September 7, 2023

Beautiful day today GTA.  Go ahead and open windows and possibly give the AC a rest.  Keep dehumidifiers going in the basement to manage proper indoor humidity and indoor air quality.  Get ready for the Fall with a Verify Indoor Air Quality Assessment or Indoor Mould Assessment to make sure your home is a healthy home for the Fall.

Thursday September 7, 2023

Thursday September 7, 2023

Thursday September 7, 2023

Finally a break Toronto.  For optimal indoor air quality you can open windows this morning until the humidity returns this afternoon.  Keep AC running once it gets humid again and the high is supposed to be 27 today.

Past Indoor Air Quality Advice

Wednesday September 6, 2023

Wednesday September 6, 2023

Wednesday September 6, 2023

Hang in there one more day Toronto.  Your indoor air quality will not be very good today if you open windows unless you have no choice due to lack of air conditioning.  Stay safe, hydrated, use those air purifiers.  Better conditions ahead.

Tuesday September 5, 2023

Wednesday September 6, 2023

Wednesday September 6, 2023

Back to School GTHA!  To protect your indoor air quality, today is not the day to open windows unless you haven a central HEPA air purification system or portable air purifiers in every room.  Keep windows closed and run the AC to reduce indoor humidity as the air is thick today.

Friday September 1, 2023

Wednesday September 6, 2023

Friday September 1, 2023

Another great indoor air quality day if you close your windows this afternoon.  Happy Long Weekend.

Thursday August 31, 2023

Wednesday August 30, 2023

Friday September 1, 2023

Last Day of August Toronto.  Good morning to open windows, but humidity is coming back so close the windows later this afternoon for optimal indoor air quality.

Wednesday August 30, 2023

Wednesday August 30, 2023

Wednesday August 30, 2023

It's a beautiful Wednesday Toronto.  Fairly good outdoor air quality today means good indoor air quality for most of the GTA.  Open those windows.  Better yet, get ready for Fall and book an indoor air quality assessment so that we can advise you on the best options for ventilation and air purification .  This way you don't need to watch the weather every day.  You could have perfect indoor air quality everyday.

Tuesday August 29, 2023

Wednesday August 30, 2023

Wednesday August 30, 2023

Today is a windows closed day for better indoor air quality.  Run the AC and dehumidifiers as well as your air purification systems.

Monday August 28, 2023

Thursday August 24, 2023

Monday August 28, 2023

It's last week of August.  Intermittent particulates and allergens starting up.  Moderate the indoor air quality today.

Friday August 25, 2023

Thursday August 24, 2023

Monday August 28, 2023

It's Friday Toronto!  For optimal Indoor Air Quality today open windows intermittently and run your AC and dehumidifiers to control the indoor humidity to prevent surface mould growth.  Best would be use your HRV to control the humidity if you have one.  Have a great weekend.

Thursday August 24, 2023

Thursday August 24, 2023

Wednesday August 23, 2023

Hey Toronto it's almost the Weekend!  With the GTA's cloud cover today the particles and allergens are elevated.  For best indoor air quality, leave windows closed until the rain cleans the air a little later this evening.  Run your ventilation and air purification systems on high today for better indoor air quality.

Wednesday August 23, 2023

Wednesday August 23, 2023

Wednesday August 23, 2023

Good morning GTHA.  A little mixed today with the rain.  Wait until the rain starts to open windows today.  For best indoor air quality open and close them intermittently.

Tuesday August 22, 2023

Wednesday August 23, 2023

Tuesday August 22, 2023

Hey Toronto, the weather is nice and particles are low.  Open those windows and clear out your stale indoor air.  If you want better indoor air quality without worrying about outdoor conditions, give us a call.  An indoor air quality assessment might change your life.

Monday August 21, 2023

Wednesday August 23, 2023

Tuesday August 22, 2023

Happy Monday Again Toronto.  Indoor air quality will be better today if you open windows just periodically.   There is some fine particulate in the air and the humidity will be an issue.  So run the AC and run the air purifiers on medium or high for best indoor breathable air.

Past Indoor Air Quality Advice

Thursday August 17, 2023

Wednesday August 16, 2023

Wednesday August 16, 2023

Better air quality later this afternoon.  Wait to open windows until the rain starts today.

Wednesday August 16, 2023

Wednesday August 16, 2023

Wednesday August 16, 2023

It's Hump Day Toronto!  You can open windows in spurts today as the airborne dust particle levels are slightly elevated in the downtown core.  For best Indoor Air Quality today run your air purification devices on high throughout the day.  Enjoy.

Tuesday August 15, 2023

Wednesday August 16, 2023

Tuesday August 15, 2023

Bit of a mixed bag today.  Rain this afternoon and evening should clear the particles out of the air.  Stay tuned for tomorrow.  FYI, check your vacuum cleaner and make sure it is HEPA filtered for good indoor air quality.

Monday August 14, 2023

Thursday August 10, 2023

Tuesday August 15, 2023

It's Monday again and August is almost half over.  Good Indoor Air Quality can be achieved today as the outdoor pollutants are low.  Open windows all day long.  You can get ready for Fall and the Heating Season by booking your Verify indoor Air Quality Assessment now and be sure you are ready to have great indoor air quality every day no matter what is happening outside.

Friday August 11, 2023

Thursday August 10, 2023

Thursday August 10, 2023

Indoor Air Quality ALERT for Etobicoke, Mississauga and North York near the 5 alarm fire.  Close your windows, shut off your ventilation systems and run your air purifiers to prevent smoke transfer indoors which will affect your indoor air quality.

Thursday August 10, 2023

Thursday August 10, 2023

Thursday August 10, 2023

Another nice day for air quality in the GTHA.  You shouldn't have any indoor air quality issues as long as you keep your filters clean and run your air purifiers while keeping windows open.  Humidity might climb a little in the afternoon, so for best indoor air quality close them this afternoon.

Wednesday August 9, 2023

Wednesday August 9, 2023

Wednesday August 9, 2023

Great Wednesday weather wise today.  Therefore a great indoor air quality day as well if you open your windows.  Unless, you have a hidden mould issue, then I would suggest calling us for an indoor environmental assessment.

Tuesday August 8, 2023

Wednesday August 9, 2023

Wednesday August 9, 2023

Happy Tuesday Toronto.  It's not a and day today for indoor air quality as the outdoor particles are moderate and the NW wind clearing out some humidity.  Feel free to open windows today but keep an eye out for possible smoky conditions later on.

Friday August 4, 2023

Wednesday August 9, 2023

Thursday August 3, 2023

Happy Long Weekend Toronto and the GTHA. Unfortunately, better celebrate indoors today as the outside particle and allergen levels are moderate to high.  That's why the lazy sunrise this morning.  With all the elevated particle levels this week, for optimal indoor air quality, it might be a good idea to do some HEPA filtered vacuuming today because of all the settled dust.

Thursday August 3, 2023

Wednesday August 2, 2023

Thursday August 3, 2023

Allergy sufferers here we go again.  Keep windows closed and run your air purifiers today.  The humidity, smoke and allergens are back.  If you don't have a central ventilation system try running your bathroom fan or kitchen fan as much as possible to exhaust poor indoor air.  For best indoor air quality you should consider having an indoor air quality assessment so that we can recommend the right central ventilation and central air purification systems for your specific needs.

Wednesday August 2, 2023

Wednesday August 2, 2023

Wednesday August 2, 2023

A mixed bag today unfortunately of airborne particles.  Your indoor air quality would be best if you open windows this morning but start closing them middle of the day as seasonal allergens and humidity will start to build. Make sure you turn on your HEPA air purifiers today so you can breath better indoors later this afternoon.

Tuesday August 1, 2023

Wednesday August 2, 2023

Wednesday August 2, 2023

Wow August already. This summer is going fast.  Toronto and GTHA air quality is still really good today.  Asthma and seasonal allergy sufferers you can open windows today again without significantly affecting your indoor air quality.  If you're having issues breathing, then it's time for an indoor air quality assessment. Give us a call.

Past Indoor Air Quality

Monday July 31, 2023

Thursday July 27, 2023

Monday July 31, 2023

Happy Monday Toronto.  Good outdoor air quality means good indoor air quality today.  Go ahead and open those windows. Maybe even a good cleaning day with a HEPA filtered vacuum cleaner. Enjoy the comfortable weather.

Friday July 28, 2023

Thursday July 27, 2023

Monday July 31, 2023

Not much better today.  Stay indoors to beat the heat and keep windows closed.  Better Air Quality is on its way soon Toronto.  Enjoy the weekend.

Thursday July 27, 2023

Thursday July 27, 2023

Thursday July 27, 2023

The rain washed most pollutants out of the air in Southern Ontario.  Good day to open windows in the morning as the humidity will be returning this afternoon.  Keep your AC on to dehumidify the Homer condo for better indoor air quality.

WednesdayJuly 26, 2023

WednesdayJuly 26, 2023

Thursday July 27, 2023

Happy Wednesday Toronto.  Unfortunately, we still have haze, humidity and smoke in the GTA which will still affect the indoor air quality if you open windows today.  Make sure you also have dehumidifiers in the basement to prevent condensation and the potential for mould growth.  Make sure your relative humidity indoors is well below 60% RH.

Tuesday July 25, 2023

WednesdayJuly 26, 2023

Tuesday July 25, 2023

Smoke, haze and humidity is back GTA!  For optimal indoor air quality leave windows closed and run your air conditioner or dehumidifier indoors today.  Maybe also check your furnace filter and make sure it's not restricting air flow to help your furnace cool your home faster.  Remember, an indoor air quality test identify indoor air quality issues in your home.  We still have all of August and September of warm weather left where the indoor environment needs to be healthy.

Monday July 24, 2023

WednesdayJuly 26, 2023

Tuesday July 25, 2023

Last full week of July Toronto.  However, the indoor air quality today is going to struggle a little for those without proper ventilation and air purification systems as the outdoor particles just measured this morning are fairly elevated.  I would leave windows closed today for better breathable indoor air.

Friday July 21, 2023

Wednesday July 19, 2023

Thursday July 20, 2023

Happy Friday Toronto.  Allergens are low to moderate today and particles are similar to yesterday in the moderate range.  So windows open this morning but you may want to close them this afternoon for good indoor air.

Thursday July 20, 2023

Wednesday July 19, 2023

Thursday July 20, 2023

Good morning Toronto.  It's another beautiful day but the airborne particles are little higher today. You can still open windows if your don't have seasonal allergies or asthma, otherwise maybe only open them for short period of time.  The indoor air quality today will be fair unless you have proper indoor air purification.

Wednesday July 19, 2023

Wednesday July 19, 2023

Wednesday July 19, 2023

It's hump day!  Fairly good outdoor air quality in Toronto and GTA this morning.  This means that the indoor air quality in Toronto homes and condo's today is also better than in the last few days.  You can open windows today as the particle levels is low, however, there still may be some seasonal allergens in the air.  Enjoy this beautiful day.

Tuesday July 18, 2023

Tuesday July 18, 2023

Wednesday July 19, 2023

Beautiful Tuesday morning GTA.  But the smoke and grasses are going to cause some indoor air quality issues today.  Still leave those windows closed unfortunately.  Either run your central air purification systems or portable HEPAs today for optimal indoor air quality.

Monday July 17, 2023

Tuesday July 18, 2023

Monday July 17, 2023

Happy Monday Toronto!  Todays outdoor allergen report shows moderate seasonal allergens however the outdoor dust particle reading is high. Opening windows today is not a good idea as these particles will affect your indoor air quality from about the Hamilton area, into Burlington, Oakville and Mississauga all the way to Toronto and beyond. If you have HEPA filtration run it on high all day for good indoor air quality.

Friday July 14, 2023

Tuesday July 18, 2023

Monday July 17, 2023

Outdoor pollutants are in the medium range today with a little bit of smog.  You can open windows for a while but close them this afternoon.  Make sure your filters are clean for optimal indoor air quality.

Need Indoor Air Quality Consulting?

Looking to improve the indoor air quality in your home or office? Contact us for a comprehensive and professional indoor air quality assessment.  Having your indoor air quality tested can help you improve your indoor air quality.

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