Wells foul, age, and degrade for a number of reasons. With increased limitations placed on new wells, higher energy costs for operation of existing wells, and ever increasing regulatory oversight, well owners are demanding more from their well systems. Each well is unique and as such, is a reflection of the sum of its components, the setting, and the way it has been maintained. While certain things can be used to extend the longevity of the “system” – there are many issues that can impact the well’s lifespan. We’ll be looking at well degradation and some of the factors that come to bare on the decision of well replacement. Well failure comes down to an issue of production, of produced water quality, quality of construction, and those areas outside of our control (aka Murphy’s and an affinity for bad luck).