In one sentence, describe what the following article is about:

In most states, it is legal to drill your own well. However, in some states, you must have a permit to drill over 200 feet, so you may need to get the permit or have the well professionally drilled. Check your local codes by calling local officials or searching online. Septic tanks, muddy areas, sewers or animal pens can all potentially contaminate wells. Waste matter leeches through the soil, all the way down to the water reservoir: anyone who drinks water from a well drilled near these areas could get sick. Drill at least 50 feet away from any of these areas. If you live in a populated area, you will want to check with your local utility companies before you drill. Many electricity, gas and telephone companies run conduits underground, so any drilling could interfere with or strike their lines. Call your utility providers to find the location of any cabling running under your property. Different factors on your property will give you information about how much water to expect to get from underwater reservoirs. Soil type, topography, information about your water table and vegetation can give clues about where to dig. Areas with heavy sand and gravel deposits often yield water. The larger the pieces of gravel or sand, the more water is most likely beneath the surface. These areas will be harder to drill, however, because of large boulders that may exist in the path of your drill. Vegetation can tell you the location of water. In arid climates, locations with greater number of plants growing indicate water below the surface. Look for groups of trees or shrubs to locate a good place to drill. Topography can help you make your choice. Areas of lower elevation, such as the bottoms of valleys or hills often yield more water. You may also have success drilling near rivers or other bodies of water like ponds or streams. It may also be helpful to call your county survey office or other planning organization and ask for groundwater maps. Many county offices can provide you with information about the location of water tables and places where others have successfully dug wells.

Summary:
Check your local laws. Don't put the well near sources of contamination. Confirm your well location with utility companies. Choose a site that will yield the most water.