River Ridge Water Hardness & Quality Report (2026)

River Ridge, Louisiana, in Jefferson Parish — a Jefferson Parish community adjacent to Harahan and Kenner on the west bank of the Mississippi River in the greater New Orleans metro — receives its water from the Jefferson Parish Water System, drawing from the Mississippi River (Jefferson Parish) through the greater New Orleans metro distribution.

The moderately hard 137 mg/L hardness and TDS of 330 mg/L reflect the southeast Louisiana Jefferson Parish Mississippi River supply's moderate calcareous character — reflecting the Mississippi River's accumulated calcareous dissolution from the vast central US watershed, balanced by the soft Appalachian and Ozark insoluble contributions, producing the moderate hardness typical of the greater New Orleans metro Mississippi supply communities. The Mississippi River at Jefferson Parish — Quaternary calcareous alluvium (calcareous — primary hardness contributor), Cretaceous calcareous formations (calcareous — secondary contributor from upper watershed drainage), and Tertiary calcareous sediments (calcareous — tertiary contributor).

At 137 mg/L, River Ridge's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 12.1 ppt is notably elevated and warrants a certified drinking water filter — the Jefferson Parish greater New Orleans industrial corridor and the Mississippi River industrial-agricultural PFAS legacy from the upper watershed contribute to River Ridge's very elevated readings.