Langley Park Water Hardness & Quality Report (2026)
Water Hardness
5.2 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
142.9 mg/L
Est. Daily Cost
$0.24
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 Langley Park, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Langley Park | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.7 yrs | 8.5 yrs | -21% |
| Washing Machine | 10.3 yrs | 12 yrs | -14% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Langley Park compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Langley Park, Maryland | 89 mg/L | 4.7 ppt | 🟡 Moderately Hard | reservoir |
| Adelphi, Maryland | 191.5 mg/L | 10.5 ppt | 🔴 Very Hard | reservoir |
| Chillum, Maryland | 155 mg/L | 8.4 ppt | 🟠 Hard | reservoir |
| Takoma Park, Maryland | 101 mg/L | 5.4 ppt | 🟡 Moderately Hard | reservoir |
| Silver Spring, Maryland | 162 mg/L | 8.8 ppt | 🟠 Hard | reservoir |
National Benchmark
How Langley Park compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Langley Park | 89 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Langley Park's Water Unique?
Local geology and source profile
Langley Park, Maryland, in Prince George's County — an unincorporated Prince George's County community adjacent to College Park and Chillum, a dense urban suburb immediately northeast of Washington DC — receives its municipal water from WSSC Water (Washington Suburban Sanitary Commission), drawing from both the Patuxent River (Rocky Gorge and Triadelphia Reservoirs) and the Potomac River supply at the Potomac treatment facility.
The soft 89 mg/L hardness and low TDS of 142.9 mg/L reflect the Patuxent-Potomac blended WSSC supply — notably softer than the DC Water Potomac supply (Capitol Riverfront DC: 113 mg/L, TDS 253), because the Patuxent River at Rocky Gorge drains the Piedmont (Precambrian Wissahickon Schist and Gneiss — insoluble silicate), producing a much softer supply than the Potomac's Appalachian carbonate drainage. The WSSC supply blends these two sources, yielding the softer regional supply.
At 89 mg/L, Langley Park's water is soft — essentially no scale forms, soap lathers abundantly, and appliances maintain good efficiency. Annual descaling is sufficient. The PFAS level of 4.7 ppt warrants a certified drinking water filter — Joint Base Andrews (Prince George's County — AFFF PFAS source in the Patuxent watershed), the NASA Goddard Greenbelt facility, and the Prince George's County industrial corridor contribute to Langley Park's readings.
Geology & Source: Langley Park in Prince George's County draws from WSSC Water (Washington Suburban Sanitary Commission) on the Patuxent River and Potomac River (Prince George's County) — the Patuxent drains the Piedmont (Precambrian Wissahickon Formation schist) and the Coastal Plain (Cretaceous Patuxent Formation sand) — Maryland Piedmont-Coastal Plain Patuxent-Potomac watershed produces soft water at 89 mg/L with TDS 143 mg/L in this Prince George's County Maryland community.