Oxon Hill-Glassmanor Water Hardness & Quality Report (2026)
Water Hardness
6.4 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
199.4 mg/L
Est. Daily Cost
$0.29
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 Oxon Hill-Glassmanor, your appliances are currently losing 15% efficiency due to mineral buildup.
| Appliance | In Oxon Hill-Glassmanor | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6 yrs | 8.5 yrs | -29% |
| Washing Machine | 9.5 yrs | 12 yrs | -21% |
| Water Heater | 11.2 yrs | 15 yrs | -25% |
Regional Water Comparison
How Oxon Hill-Glassmanor compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Oxon Hill-Glassmanor, Maryland | 110 mg/L | 5.9 ppt | 🟡 Moderately Hard | reservoir |
| Oxon Hill, Maryland | 177.5 mg/L | 9.7 ppt | 🟠 Hard | reservoir |
| Glassmanor, Maryland | 137 mg/L | 7.4 ppt | 🟠 Hard | reservoir |
| Hillcrest Heights, Maryland | 105.5 mg/L | 5.6 ppt | 🟡 Moderately Hard | reservoir |
| Camp Springs, Maryland | 103 mg/L | 5.5 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Oxon Hill-Glassmanor compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Oxon Hill-Glassmanor | 110 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Oxon Hill-Glassmanor's Water Unique?
Local geology and source profile
Oxon Hill-Glassmanor, Maryland, unincorporated communities in Prince George's County — a major south Prince George's County community adjacent to National Harbor (National Harbor — the large mixed-use waterfront development on the Potomac River in Oxon Hill — includes the Gaylord National Resort and Convention Center and is a major entertainment and hospitality destination for the DC area), directly adjacent to Washington DC across the Potomac River, a diverse Prince George's County community with a significant African-American majority population (Prince George's County has one of the highest concentrations of affluent African-American households in the United States), and adjacent to Joint Base Andrews (Camp Springs) — draws its municipal water supply via the WSSC Water. Water hardness in Oxon Hill-Glassmanor measures 110 mg/L — classified as moderately hard.
Oxon Hill's moderate hardness reflects the WSSC supply characteristics and the south Prince George's County distribution zone. The WSSC Patuxent River watershed (Triadelphia and Rocky Gorge Reservoirs) drains the Maryland Piedmont and the Cambrian Cockeysville Marble (calcareous marble of Baltimore–Howard Counties). WSSC distributes through the south Prince George's County Oxon Hill zone (primarily 1950s–1970s suburban development mains), producing the moderate 110 mg/L.
At 110 mg/L, Oxon Hill-Glassmanor residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. WSSC Water consistently delivers water meeting all Maryland MDE and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply via the Washington Suburban Sanitary Commission (WSSC Water) — the Prince George's County south Maryland Oxon Hill DC suburban corridor (WSSC Patuxent River Triadelphia and Rocky Gorge Reservoirs — the Maryland Piedmont calcareous-moderate supply; WSSC south Prince George's County distribution to Oxon Hill–Glassmanor zone); moderately hard supply at 110 mg/L — reflecting WSSC distribution characteristics.