Hydraulic fracturing hasn’t contaminated groundwater in Texas, isn’t an earthquake hazard, and has been a boon for the state’s economy, according to a study released Monday.

The new study’s conclusions on drinking water are in line with multiple other studies of hydraulic fracturing, popularly known as fracking.

Hydraulic fracturing is the process of drilling into rock and injecting a high-pressure mixture of water, sand, and chemicals to obtain shale gas and oil, which is produced from fractured rock. Some environmentalists argue that it can harm water supplies.