Our aquifer is very vulnerable to contamination for several reasons based on geology and land use:
- urban, residential, industrial, and agricultural land uses with the potential to contaminate the water supply occur directly over the aquifer;
- water and contaminants from the ground surface can move quickly to the aquifer because there is minimal natural protection (shallow depth to water, thin soil cover, highly permeable gravels between the ground surface and the water table);
- numerous artificial sources of recharge associated with urban and residential land uses (drain wells, ditches, and septic drain fields) accelerate the movement of contaminants to the aquifer; and
- the highly permeable aquifer allows contaminants to spread rapidly, making it difficult to clean up contamination once it has entered the aquifer.