Well Water in St. Johns County: What to Test and Why

Groundwater in St. Johns County contains no contaminants at levels that exceed EPA health standards. Contaminant levels here are low, which is good news for well owners.

The surficial aquifer system in this area sits close to the surface and is naturally protected by sandy soil that filters water as it moves down. The flat terrain and sandy geology here do not concentrate harmful contaminants the way other rock types do in neighboring regions. Land use in the county is mixed, but the natural filtering ability of the sand keeps drinking water sources clean.

Mineral and aesthetic character data are not available for this county, so the exact hardness and mineral content of wells cannot be stated with certainty. The surficial aquifer system typically produces water with variable mineral content depending on the specific sand layers and soil composition at each well location. Well water in St. Johns County likely varies from one property to another in its mineral character.

Good news for St. Johns County well owners: testing shows that wells in this county are not showing contaminants at levels that exceed EPA health standards. This is a positive sign for the water quality across the area.

Mineral content in county well water has not been identified as a widespread concern at this time. Without high levels of iron, sodium, or sulfate, most residents should not experience common problems like staining, scale buildup, or unusual taste or odor in their water.

We recommend testing your well water anyway, because every well is different and your water could have higher or lower levels than what is common across the county. Testing is the only way to know what is actually in your specific well so you can decide if any treatment is needed. A basic screening test for bacteria and nitrate runs about fifty to one hundred dollars. If you want more complete information, a comprehensive minerals panel costs two hundred to four hundred dollars.