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Our mission is to maintain the purity of Missouri's air to protect the health, general welfare and property of the people. Whether urban citizen or rural resident, everyone in Missouri needs and deserves clean air. In other words, the 6 million residents of Missouri are our customers.


What has Missouri done to improve our air?

For a study in contrasts, go to Missouri Skies Now and Then.

Which pollutants do we monitor most closely?

Click here to learn about the six criteria pollutants and to access up-to-date information.

How do we rate air quality?

Using the Air Quality Index, we provide information on pollution from ground-level ozone and particulate matter. The Air Quality Index uses colors to inform the public on how clean (or polluted) our air is. Each color corresponds to a different level of health concern. More...


How does Missouri track air pollution?

We track air pollution with approximately 50 air monitors. To access our network, click on the interactive map.

Convenience Fee Applicable to Credit Card Payments

Effective July 1, 2014, per Chapter 37, Section 37.007, of the Missouri Revised Statutes, a convenience fee will be charged to all customers who wish to pay by electronic method.  The convenience fee will be retained by a third-party vendor, Collector Solutions, Inc., not the Missouri Department of Natural Resources. 

Transaction Dollar Amount Fee
$0 - 50 $1.25
$50.01 - $75 $1.75
$75.01 - $100 $2.15
$100.01 - and up 2.15%

Tips for Saving Money and Lowering Air Pollution

Install a programmable thermostat: Cooling and heating your home accounts for almost half of your energy bill – about $1,000 a year.
    • Set your thermostat for 78 degrees during summer — or 68 degrees during winter — when you are awake and at home.

    • Decide upon a period of eight hours or more each day to set your thermostat 10 − 15 degrees warmer during summer or 10 to 15 degrees cooler during the winter.

  Check your heating/cooling filter every month, particularly during winter and summer when the system may run almost constantly. Change the filter every three months or sooner.
  Dirty filters slow down air flow, making the system work harder to keep you comfortable.

  Turn off unnecessary lights and unused appliances to reduce emissions from power plants and save money. Purchase Energy Star® appliances.

  Minimize the amount of gasoline you use.
     • Walk, carpool, ride a bicycle and use mass transit.
     • Consolidate trips.
     • Avoid unnecessary idling. Park instead of using drive-through lanes. Turn off your engine while waiting to drop off or pick up people.

  Learn more about efforts to improve air quality
     • Access the fact sheet: "What You Can Do To Improve the Air."
     • Read  the department's anti-idling brochure.
     • Visit related links. Go to and

Emissions Reporting

Featured Pages

Reducing Diesel Emissions

Rules, SIPs and Permits