Jasper Water Hardness & Quality Report (2026)

Jasper, Indiana, in Dubois County — the Dubois County seat adjacent to Huntingburg and Ferdinand on the Patoka River in southwest Indiana — receives its municipal water from the Jasper Water Division, drawing from the Patoka River (Dubois County) through the southwest Indiana water treatment system.

The moderately hard 131 mg/L hardness and TDS of 207.7 mg/L reflect the southwest Indiana Patoka River supply's moderate Mississippian calcareous character — consistent with the Wabash Lowland Indiana community supplies. The Patoka River at Dubois County drains the Indiana Wabash Lowland — Mississippian Borden Group (calcareous siltstone — primary hardness contributor), Mississippian St. Louis Limestone (calcareous — secondary contributor), and Pennsylvanian Mansfield Formation (slightly calcareous sandstone). The Mississippian calcareous shale and limestone produce the moderately hard southwest Indiana supply.

At 131 mg/L, Jasper'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 3.8 ppt is low — the Dubois County southwest Indiana furniture manufacturing and agricultural corridor has limited major AFFF military sources adjacent to the Patoka watershed, and the river headwaters are relatively clean.