Last week, the EPA released 1,000-plus draft pages of its "Hydraulic Fracturing Drinking Water Assessment." The report took almost five years to produce and essentially tells us (in great detail) what we already knew: Fracking and drinking water are a bad combination. On top of that, the EPA finally admitted that water resources have already been contaminated by fracking: "We found specific instances where one or more mechanisms led to impacts on drinking water resources, including contamination of drinking water wells."

So much for past assertions -- not just from fossil fuel companies but also from Obama administration officials -- that no instance of drinking water contamination has ever been documented. And don't even get me started on the fossil fuel PR hacks and politicians who tried to claim that this report shows that fracking is safe. When you add up the threat to drinking water and all of the other problems with fracking that this report doesn't address -- the air pollution, the climate-disrupting methane, the landscape destruction, the earthquakes -- it's as obvious as ever that fracking is dirty, dangerous, and a terrible idea.

OK, so we knew that. What else, then, does this report have to tell us? Here are five takeaways, one for each year the EPA spent on this:

1. Oil and gas companies want you to know as little about fracking as possible. This EPA report offers no new research on whether fracking contaminates water supplies. Instead it relies on "available data and literature," including previous investigations by state regulators into fracking-related water pollution. The main reason for this is that oil and gas companies did all they could to make gathering new data impossible. And they were able to do that because Congress and successive administrations have exempted them from so many federal pollution rules.

2. Opportunities abound for disaster. One thing the EPA's report does detail is the many risks that fracking operations pose to drinking water both above and below ground -- from mixing the fracking chemicals to injecting the fracking fluid into the well to handling the millions of gallons of toxic, radioactive waste water. So many ways that something could go wrong! Now you know why this report is more than 1,000 pages long.

3. Fracking is happening close to where we live. According to the EPA, "Between 2000 and 2013, approximately 9.4 million people lived within one mile of a hydraulically fractured well."

4. Lots of fracking is also happening close to our water supplies. Again, according to the EPA: "Approximately 6,800 sources of drinking water for public water systems were located within one mile of at least one hydraulically fractured well ... These drinking water sources served more than 8.6 million people year-round in 2013." Suppose you're lucky enough to live more than a mile from the nearest fracking site? EPA: "Hydraulic fracturing can also affect drinking water resources outside the immediate vicinity of a hydraulically fractured well." What's more, the EPA points out that in some places, such as Michigan, Illinois, Indiana, and Kentucky, fracking happens at relatively shallow depths, where "oil and gas resources and drinking water resources co-exist in the same formation."

5. What they don't know could hurt you. Of the 1,076 chemicals used in fracking that the EPA could identify, the agency was able to assess the chemical, physical, and toxicological properties for fewer than half. Of those, the majority have the potential to "persist in the environment as long-term contaminants." Great, but how many of them are potentially carcinogenic? The EPA could find data for about 90 of them, but offered a bureaucratic shrug of the shoulders as to what level of exposure people might have to those carcinogens. Feeling reassured yet?

We didn't need 1,000 pages to figure out the obvious. We don't even need 1,000 words. Here's what we know: Fracking is a nationwide game of Russian roulette that puts an essential resource -- drinking water -- at risk every single day. The sooner it stops, the better.