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Lake Michigan Air Directors Consortium (LADCO)

The Lake Michigan Air Directors Consortium (LADCO) was established in 1990 by the states of Illinois, Indiana, Michigan and Wisconsin with Ohio being added in 2004. The purpose of LADCO is to provide technical assistance to its member states on issues related to air quality. Ohio, Illinois and Indiana have each adopted Architectural and Industrial Maintenance (AIM) coating VOC limits consistent with those in the OTC Model Rule 2002. Michigan and Wisconsin continue to follow the EPA National Rule.

LADCO Exemptions:

  • Small container exemption allows the sale of coatings above maximum VOC limits if packaged in containers of one liter or less.
  • Sell-through provision allows the sale of coatings above the maximum VOC limits if manufactured prior to the individual state rule's effective data. The sell through period may range from three years to indefinite.

For the most current information on LADCO, please visit

For the individual state rules please visit the specific state environmental protection agency website.

Coating Category*

VOC (g/L)

Non-Flat High Gloss250
Industrial Maintenance General340
Industrial Maintenance High Temp420
Quick Dry Primer200
Specialty Primer350
Quick Dry Enamel250
Rust Preventative400
Dry Fog400
Waterproofing Sealer - Wood250
Waterproofing Sealer - Concrete400

*Category names are for comparison purposes between the various air districts only. 

The actual name listed in specific rules may vary.

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