Search the Public Land Survey System (PLSS) at the National Atlas of the United States online for a legal land description complete with all water, oil, and gas well records as designated within each state and county.

Search the United States Geological Survey (USGS) at for water, gas, and oil well maps on or near your land, listed by state and county.

Search municipal and township offices and local libraries for documentation that may give further clues as to the location of producing wells such as: building permits, old land deeds, property surveys, land transfer documents, as well as both current and historical aerial photographs.

Walk your entire property and investigate for likely places that a well may exist such as: residences, dwellings, barns, livestock feeding sites and fields with irrigation as well sites are likely to be located close to the area of intended use.

Draw a sketch on a map of the property identifying all potential well sites which include: abandoned houses, windmill sites, outbuildings, pump houses, barns, old foundations, piles of wood or other debris, silos, feeding pens, watering troughs, .

Physically check all uncultivated areas such as grassy or treed areas near actively cropped areas as it may be an old water, gas, or oil well site.

Look for evidence and debris of an old well such as: old hand pumps; piles or rock and clay; steel casings, electrical switch boxes; pump motors; rings of concrete, bricks, or wood; buried piping as evidenced by pipes sticking up out of the ground; abnormal depressions in the ground; or aquatic vegetation.

Consult a geophysicist to perform three non-invasive geophysical surveys; an electromagnetic survey, and a magnetic and ground penetrating radar survey, to locate oil and gas deposits beneath the earth's surface which indicate the presence of a oil or gas producing well, without having to excavate.

Talk to long time neighbors that border your land for oral histories of preexisting wells that may not be documented.