PITTSBURGH—The Pennsylvania Department of Health says it's received less than 30 complaints over the last year from people who feel natural gas drilling has impacted their health.

The state's public health agency also says it has no manuals or guidelines for how its staff should respond to health complaints about gas drilling.

The information came in response to a Right to Know request from The Associated Press, but the agency refused to provide details of the complaints, such as where and when they occurred.

The AP reported earlier this month that politicians stripped up to $2 million in new Health Department funding from recent legislation. Officials had planned to use the money to research and register the health impacts of gas drilling.