California environmental experts reviewed more than 450 complaints from Santa Cruz and Monterey county residents. The symptoms ranged from shortness of breath to headaches.

Jane Denton worked on the report and is director of the Office of Environmental Health Hazard Assessment. She says there was not enough data to draw specific conclusions. 
 
Denton: “Going through the illness complaints methodically we were unable to find a link between the symptoms and the spraying.” 
 
Denton says it was hard to distinguish between the complaints and other common health problems. The state will spray again for the moth in Santa Cruz and Monterey counties in June. The Bay Area will be sprayed in August. But, some lawmakers are working on legislation to put more restrictions on spraying.