Haliburton decided to use things from the FDA’s GRAS (generally accepted as safe) list - like vinegar - for their fracking. In PA, the companies are required to disclose what they are using for fracking. And sand - - sand is a chemical you are worried about????
The sand is needed to prop open the tiny cracks created by
fracking. The vinegar or other acid is needed to keep the calcium or lime in the water from clogging up the tiny openings.
Folks near well drilling operations need to test their wells prior to any drilling. The test needed costs about $300 and will give baseline readings for various natural substances in your water. A cheap test for total dissolved solids and e coli won’t cut it.
If you have baseline tests or live withing 1,000 feet of a well, any post drilling water issues will be fixed by the drilling company under PA law currently.