Hello Chris,

Based on the images you sent, this looks a lot like Oak anthracnose in its advanced stage

I have included below some descriptions of Oak anthracnose from different universities

From Michigan State University - Oak anthracnose is caused by Apignomonia quercinia (good luck pronouncing that), while A. Veneta causes sycamore anthracnose. Both of these pathogens blight foliage and in some cases create cankers on twigs, resulting in dieback. Anthracnose foliar lesions are large, irregularly shaped areas of necrotic tissue along the leaf margins and between the veins. Leaf blighting typically begins on lower branches and spreads upward. With a hand lens, you may be able to see the fungal fruiting bodies along the veins of infected foliage. As a rule, fungicides are not recommended for the control of shade tree anthracnose. Large well-established trees that are otherwise healthy can withstand the damage without serious long-term effects. In time, severely infected plants will push forth a new flush of growth from buds that would otherwise have remained dormant. Some examples where chemical control might be appropriate include protection of smaller trees or trees that are not well established, or in “showcase” areas where for aesthetic reasons it is important to maintain a disease-free tree. Applications of Protect T/O, Camelot, thiophanate-methyl, or Spectro will help protect foliage from infection. Refer to the fungicide label for application rates and intervals. WAIT UNTIL YOU HEAR FROM THE MSU DIAGNOSTIC PLANT LAB BEFORE YOU USE THESE FUNGICIDES - YOU MIGHT NOT NEED THEM

If you are not inclined to use fungicides to manage this disease, remember that sanitation is also important. Fallen leaves should be raked up and removed, spores of the pathogen remain viable on this dead foliage throughout the winter. In the spring humidity and rain, help spread spores to the newly emerging foliage. Where possible it is helpful to prune and destroy dead twigs and branches from the trees during dormancy (This is probably impossible with large trees.). Some references indicate that white oak is more susceptible to infection than other oak species. Likewise, there are a few anthracnose tolerant cultivars of sycamore available. From the Shade tree anthracnose article - Jan Byrne, Michigan State University Extension, Diagnostic Services - June 9, 2006, at this link: https://www.canr.msu.edu/news/shade_tree_anthracnose

From the University of Nebraska - Oak Anthracnose - Oak anthracnose, caused by the fungus Apiognomonia quercina, attacks many species of oaks including bur, white, swamp white, English, pin, northern red, and chestnut oak. Susceptibility varies among species, with white and bur oaks usually the most severely affected. Figure 5. Leaf distortion caused by oak anthracnose lesions. (Photo courtesy Mark Gleason, Iowa State University) The first symptom seen in the spring is usually shoot blight, which can develop suddenly following rain. Young leaves and shoots appear brown and shriveled. Leaves that have already expanded may become cupped and distorted with large areas of dead tissues (Figure 5). Small, brown fruiting bodies (acervuli) may become visible on the lower surface of the dead leaves on or near major veins. Some leaf drop may occur. Mature leaves are fairly resistant and infection causes only small necrotic spots. The fungus also infects twigs, producing cankers and causing twig dieback during the winter and early spring. From the Anthracnose Diseases of Shade Trees - University of Nebraska Bulletin - Look at Figure 5 in the Oak Anthracnose section at this link: https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=2260&context=extensionhist

University of Minnesota Anthracnose of shade trees - the University of Minnesota at this link:

https://extension.umn.edu/plant-diseases/anthracnose-trees-and-shrubs

Because you are seeing this on nearly 100% of your white oak leaves I would strongly recommend you get a CONFIRMED diagnosis on this disease from the MSU Diagnostic Plant Lab - Please send your images to the MSU Diagnostic Plant Lab. The lab strongly encourages clients to email digital images prior to bringing or sending physical samples. Images can be sent to <personal data hidden>. There is a $20-25 dollar fee (if they need a sample sent). Their website has the form and instructions: https://www.canr.msu.edu/pestid/

After the MSU Diagnostic Plant Lab lets you know and when you are ready to send a sample - Complete details of submitting a sample are at this link: https://www.canr.msu.edu/pestid/submit-samples/

Hope this helps!!

You are welcome - Have a great day!!