Ashland Water Hardness & Quality Report (2026)

Ashland, Ohio, in Ashland County — the Ashland County seat in north-central Ohio, the home of Ashland University and the corporate headquarters of Ashland Inc. (formerly Ashland Chemical — one of the largest specialty chemicals companies in North America), a historic north-central Ohio manufacturing and college community — receives its municipal water from Ashland City Water, which draws from the Black Fork Mohican River or the Jerome Fork (Mohican River tributaries) in the north-central Ohio Mohican watershed.

The moderately hard 196.5 mg/L hardness and elevated TDS of 437.1 mg/L reflect the Mohican River watershed's north-central Ohio geology. The Mohican River and its tributaries drain the North-Central Ohio Till Plain — glaciated terrain underlain by the Mississippian Black Hand Sandstone (the geological unit responsible for the famous Black Hand Gorge State Nature Preserve on the Licking River, south of Ashland County), the Devonian Olentangy Shale and Delaware Limestone, and older Silurian dolomite formations. The calcareous glacial till of north-central Ohio and the Devonian limestone bedrock contribute consistent moderate hardness to the Mohican watershed throughout Ashland County.

At 196.5 mg/L, Ashland's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and bathroom fixtures develop calcium deposits. Quarterly descaling is appropriate. The PFAS level of 7.7 ppt warrants a certified drinking water filter — Ashland Inc. chemical manufacturing operations (a Fortune 500 specialty chemicals company headquartered in Ashland), the Ohio Army National Guard training areas in the Mohican watershed, and the north-central Ohio industrial corridor contribute to Ashland County's PFAS readings.