Lanham-Seabrook Water Hardness & Quality Report (2026)
Water Hardness
7.5 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
257.8 mg/L
Est. Daily Cost
$0.34
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Lanham-Seabrook, your appliances are currently losing 17% efficiency due to mineral buildup.
| Appliance | In Lanham-Seabrook | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.3 yrs | 8.5 yrs | -38% |
| Washing Machine | 8.8 yrs | 12 yrs | -27% |
| Water Heater | 10.4 yrs | 15 yrs | -31% |
Regional Water Comparison
How Lanham-Seabrook compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Lanham-Seabrook, Maryland | 129 mg/L | 7 ppt | 🟠 Hard | reservoir |
| Seabrook, Maryland | 137.5 mg/L | 7.4 ppt | 🟠 Hard | reservoir |
| New Carrollton, Maryland | 123 mg/L | 6.6 ppt | 🟠 Hard | reservoir |
| Glenn Dale, Maryland | 143 mg/L | 7.7 ppt | 🟠 Hard | reservoir |
| Greenbelt, Maryland | 169.5 mg/L | 9.2 ppt | 🟠 Hard | reservoir |
National Benchmark
How Lanham-Seabrook compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Lanham-Seabrook | 129 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Lanham-Seabrook's Water Unique?
Local geology and source profile
Lanham-Seabrook, Maryland, in Prince George's County — an unincorporated Prince George's County community adjacent to Greenbelt and Largo, in the northeast Washington DC metro corridor — receives its municipal water from the Washington Suburban Sanitary Commission (WSSC), drawing from the Potomac River at the WSSC Potomac WFP (Water Filtration Plant) in Potomac, Maryland.
The moderately hard 129 mg/L hardness and TDS of 257.8 mg/L are consistent with the WSSC Potomac River supply zone serving the inner Prince George's County communities. The Potomac River at the WSSC intake drains the Blue Ridge (Catoctin metavolcanic — insoluble), the Shenandoah Valley (Cambrian-Ordovician carbonates — significant hardness contributor), and the Triassic Culpeper Basin (calcareous redbeds). The combined Shenandoah-Piedmont calcareous drainage produces the moderately hard water characteristic of the WSSC supply.
At 129 mg/L, Lanham-Seabrook'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 7.0 ppt warrants a certified drinking water filter — the Joint Base Andrews (Prince George's County — AFFF in the Potomac-Patuxent watershed), the Potomac River industrial corridor, and the Washington DC metro PFAS complex contribute to Lanham-Seabrook's readings.
Geology & Source: Lanham-Seabrook in Prince George's County draws from Washington Suburban Sanitary Commission on the Potomac River (Washington metro) — the Potomac drains the Blue Ridge (Precambrian Catoctin metavolcanic) and the Piedmont (Triassic Culpeper Basin calcareous) — Maryland Potomac River Blue Ridge-Piedmont calcareous watershed produces moderately hard water at 129 mg/L with TDS 258 mg/L in this Prince George's County Maryland community.