Fairland Water Hardness & Quality Report (2026)

Fairland, Maryland, in Montgomery County in the eastern corridor between Silver Spring and the Howard County border — a diverse unincorporated community along the Intercounty Connector technology corridor — receives its municipal water from the Washington Suburban Sanitary Commission (WSSC), which draws primarily from the Potomac River via the Little Falls Water Treatment Plant near Bethesda, with supplementary supply from the T. Howard Duckett Reservoir on the Patuxent River. Fairland's eastern Montgomery County position places it in the WSSC service zone with a higher proportion of Potomac River supply.

The hard 184 mg/L hardness and elevated TDS of 466.5 mg/L are notably higher than other WSSC communities in this dataset, reflecting Fairland's supply being more heavily weighted toward the Potomac River source in WSSC's blended system. The Potomac River at Little Falls carries substantial carbonate hardness from its extensive Valley and Ridge upper basin — particularly the Shenandoah River tributaries draining the Cambrian Conococheague Formation and Ordovician Beekmantown Group carbonate corridor of the Shenandoah Valley. When WSSC's Potomac supply dominates with less Patuxent dilution, finished water hardness rises into the hard range.

At 184 mg/L, Fairland residents experience hard water requiring regular mineral management. Scale forms in kettles and coffee machines within weeks, dishwashers leave mineral deposits on glassware without rinse aid, and bathroom surfaces develop calcium rings over time. Descaling appliances every six to eight weeks is the practical schedule. The elevated PFAS level of 10.1 ppt adds significant concern — eastern Montgomery County's technology and federal corridor contributes to elevated PFAS levels compared to western Montgomery communities. A certified reverse osmosis filter for drinking and cooking water is strongly advised.