Paints & Coatings Resource Center

Ask the Expert Question-and-Answer Archive

by Ron Joseph

February, 2006

Accuracy of EPA Method 24 for Waterborne Paints

Q. Do you have any information on the accuracy of Method 24 Testing for VOC content of waterborne paints?

A. Method 24 is sufficiently accurate if you have a significant amount of cosolvent (coalescing agent) in the paint. However, some of the newer formulations contain very little cosolvent, and in these cases Method 24 results might not be sufficiently accurate to stand up in court. This applies particularly to reporting the results in VOC (lbs/gal, less water). For this reason some state agencies have told me that they do not conduct Method 24 on waterbornes. What is your situation?

If you want to learn more about this entire topic please visit I am running a 3-day class in May that covers this topic in great detail.

Best wishes,

Ron Joseph

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