Get in the #KNOWZONE: Text OZONE to 74121 to Get Ozone Alerts*

About Ozone Alert Days

Between March and November, emissions called volatile organic compounds (VOCs) and nitrogen oxides (NOx) released from internal combustion engines chemically react in sunlight on hot, windless days and form ground-level ozone, a major component of smog. When weather conditions project the possibility of high ground-level ozone, the Oklahoma Department of Environmental Quality declares an Ozone Alert Day.

Ozone Alert Days mean air pollution is expected to reach unhealthy ranges. Ozone exposure is a health risk to the entire population but particularly sensitive are children, the elderly, anyone with respiratory or cardiovascular illnesses and anyone who experiences prolonged exposure.

Ozone Alert Days serve to notify the public that they should make voluntary changes to reduce their contribution to dangerous ground-level ozone.

When you get in the #KNOWZONE, you give ACOG the green light to send you notices for Ozone Alert Days.

*After signing up to receive Ozone text alerts if at any time you wish to no longer receive texts from ACOG, reply STOP to 74121 to opt out. If you need assistance after receiving an OZONE alert, please type HELP to 74121 for help. Standard message and data rates apply. The Association of Central Oklahoma Governments (ACOG) respects your privacy and is committed to protecting it.  Read the Terms and Conditions here. Read the ACOG Privacy Policy here.

Staff Contacts

Eric Pollard

Air Quality & Clean Cities Manager


Cleaner Commute

Choose a cleaner commute; share a ride to work or use public transportation. Bicycle or walk to errands when possible but be sure to avoid prolonged exposure or high-exertion as a heightened respiratory rate means you’re inhaling larger quantities of ozone

Conserve Energy

Conserve electricity and set your air conditioner to a higher temperature.  Pre-cool your home during non-peak hours

Outdoor Activities

Delay gas-powered lawn mowing and landscape maintenance. Avoid outdoor burning and avoid using higher VOC household chemicals and paints.

Idling & Engine Run-Time

Limit engine idling, avoid congested roadways and drive-thrus. Delay errands and reduce vehicle trips.


Refuel vehicles after dusk.

Ozone Alert Day History



June 19, 2019
July 24, 2019
August 7, 2019
August 15, 2019
September 4, 2019
September 5, 2019



May 17, 2018
May 9, 2018



September 13, 2017
August 3, 2017
July 7, 2017
July 6, 2017
June 8, 2017



June 10, 2015



Thursday, July 24th



Friday, July 12th
Thursday, August 22nd
Thursday, September 12th



Friday, May 18th
Monday, June 25th
Tuesday, June 26th
Wednesday, June 27th
Thursday, June 28th
Friday, June 29th
Tuesday, July 10th
Wednesday, July 11th
Thursday, July 12th
Friday, July 13th
Saturday, July 21st
Thursday, August 2nd
Friday, August 3rd
Monday, August 6th
Tuesday, August 7th
Wednesday, August 8th
Friday, August 10th
Tuesday, September 4th
Wednesday, September 5th



Friday, June 3rd
Tuesday, June 28th
Wednesday, July 6th
Thursday, July 7th
Saturday, July 9th
Friday, July 29th
Thursday, August 4th
Saturday, August 20th
Thursday, August 25th
Friday, August 26th
Saturday, August 27th
Sunday, August 28th
Thursday, September 1st
Friday, September 3rd



Friday, May 28th
Thursday, August 12th
Thursday, August 19th
Monday, August 23rd
Saturday, August 28th



Saturday, June 6th
Thursday, June 25th
Friday, June 26th
Saturday, June 27th
Wednesday, July 1st
Thursday, August 13th
Tuesday, August 25th
Wednesday, August 26th



Friday, July 4th
Friday, August 1st



Tuesday, August 14th
Wednesday, August 15th
Thursday, August 16th



Thursday, May 25th
Monday, June 12th
Thursday, June 15th
Thursday, June 29th
Friday, June 30th
Saturday, July 1st
Sunday, July 2nd
Wednesday, July 19th
Thursday, July 20th
Friday, July 21st
Thursday, August 24th



Tuesday, June 21st
Wednesday, June 22nd
Friday, June 24th
Saturday, June 25th
Sunday, June 26th
Saturday, July 30th
Monday, August 1st
Tuesday, August 2nd
Thursday, August 4th
Saturday, September 3rd
Sunday, September 4th
Monday, September 5th



Wednesday, July 21st
Friday, July 30th



Wednesday, July 2nd
Thursday, July 3rd
Wednesday, July 30th
Wednesday, August 6th
Thursday, August 7th
Saturday, August 23rd
Tuesday, August 26th



Monday, June 24th
Tuesday, June 25th
Tuesday, July 9th
Wednesday, July 10th
Thursday, July 25th
Friday, August 9th

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