Are CNG Vehicles Safe?
It comes as a surprise to many to hear that CNG is one of the safest transport fuels available, CNG is actually safer than gasoline! We encourage you to explore the resources below to learn more about CNG’s proven track record on safety. Of course, the best assurance for safe CNG conversions is to select only a qualified, certified CNG conversion center like Nat G™. Click here to learn more about why qualified, certified companies make a difference.
Click Here for a report on CNG Safety
There is a lot of good information here on the Altech Eco site as well.
And this video is a little dated but has lots of great information.