HARRISBURG, Pa. — Gov. Tom Corbett’s top health adviser said Friday that he wants to make Pennsylvania the first state to create a registry to track illnesses in communities near heavy drilling in the Marcellus shale natural gas formation to determine what kind of impact, if any, the activity has on public health.

Health Secretary Eli Avila told Corbett’s Marcellus Shale Advisory Commission that creating such a registry is the timeliest and most important step the Department of Health could take, and that his agency is not aware of anything like it in other drilling states.

“We’re really at the frontiers of this and we can make a speedy example for all the other states,” Avila told the commission at its fourth meeting.

Collecting information on drilling-related health complaints, investigating them, centralizing the information in one database and then comparing illnesses in drilling communities with non-drilling communities could help refute or verify claims that drilling has an impact on public health, he said. The aggregation of data and information also would allow the Department of Health to make its findings public, in contrast to the privacy that surrounds its investigation into individual health complaints and the findings that may result.

The Marcellus shale formation, considered the nation’s largest-known natural gas reservoir, lies primarily beneath Pennsylvania, New York, West Virginia and Ohio. Pennsylvania is the center of activity, with more than 3,000 wells drilled in the past three years and thousands more planned in the coming years as thick shale emerges as an affordable, plentiful and profitable source of natural gas.

The rapid growth of deep shale drilling and its involvement of high-volume hydraulic fracturing, chemicals and often-toxic wastewater are spurring concerns in Pennsylvania about poisoned air and water.

“As drilling increases, I anticipate, at least in the short term, a proportionate increase in concerns and complaints which the department must be prepared to address,” he said.

In the past year or so, the Department of Health has received several dozen or so health complaints, he said.

One woman, Crystal Stroud, of Granville Summit in northern Pennsylvania, told an anti-drilling rally in the Capitol this month that she is hearing from others in Bradford County about bizarre and sudden health problems that they blame on contaminated water from the area’s heavy drilling.

Stroud herself blames her barium poisoning on well water polluted by drilling near her home, and accused state agencies of turning a blind eye.

“I am extremely confused as to why our Health Department is not interested in these issues and no one from (the) Pennsylvania Health Department has contacted us, and why are they not investigating this?” Stroud, 29, told the crowd on June 7.

“Every week I receive a phone call from someone different in my county that has unexplained rashes, high blood pressure, heart palpitations, high barium levels, a child with blisters all over his face from his mother bathing him in the water, and even a woman whose spleen burst in an unexplained way, all with contaminated water,” she said.

A spokesman for Corbett has said both the departments of Health and Environmental Protection have active investigations into Stroud’s claims, and the company that drilled the well, Dallas-based Chief Oil & Gas LLC, has denied responsibility for Stroud’s health problems.

On Friday, Avila said his agency has found no links between drilling and the illnesses and diseases presented to it so far, but he added that a wider study is necessary to determine whether there are any associations, and a health registry could accomplish that.

Such health registries are common, and in the past have been created to monitor and study data related to cancer and rare diseases, health department officials said. To set up a drilling-related registry and fully investigate drilling-related health complaints would require another $2 million a year for the department and possibly require the help of the state’s schools of public health, Avila said.

Shale drilling requires blending huge volumes of water with chemical additives and injecting it under high pressure into the ground to help shatter the thick rock — a process called hydraulic fracturing. Some of that water returns to the surface, in addition to the gas, as brine potentially tainted with metals like barium and strontium and trace radioactivity by the drilling companies.