Saint Simons Island Water Hardness & Quality Report (2026)

Saint Simons Island, Georgia, in Glynn County — a Glynn County barrier island adjacent to Brunswick and Jekyll Island on the southeast Georgia coast — receives its water from the Glynn County Water system, drawing from the Floridan Aquifer or Brunswick-Golden Isles supply (Glynn County) through the southeast Georgia coast distribution.

The moderately soft 85 mg/L hardness and low TDS of 132 mg/L reflect the southeast Georgia coast Glynn County Floridan Aquifer supply's moderate character — somewhat softer than the Florida interior Floridan draws because the southeast Georgia coastal Floridan aquifer is less confined and receives more dilution from the shallow Atlantic Coastal Plain sandy aquifer, consistent with the Georgia Golden Isles communities. The Floridan Aquifer at Glynn County — Eocene Ocala Limestone (calcareous — primary hardness contributor), Oligocene Suwannee Limestone (calcareous — secondary contributor), and Quaternary Atlantic Coastal Plain sands (insoluble — dilutant).

At 85 mg/L, Saint Simons Island's water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and no softening is needed. Annual descaling is appropriate. The PFAS level of 3.8 ppt warrants a certified drinking water filter — the Glynn County southeast Georgia coastal industrial corridor contribute to Saint Simons Island's readings.