Rosaryville Water Hardness & Quality Report (2026)
Water Hardness
10.4 grains per gallon
Source
reservoir
pH Level
8.2
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
440.5 mg/L
Est. Daily Cost
$0.47
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 Rosaryville, your appliances are currently losing 24% efficiency due to mineral buildup.
| Appliance | In Rosaryville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.7 yrs | 8.5 yrs | -56% |
| Washing Machine | 7 yrs | 12 yrs | -42% |
| Water Heater | 8.5 yrs | 15 yrs | -43% |
Regional Water Comparison
How Rosaryville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Rosaryville, Maryland | 178 mg/L | 9.7 ppt | 🟠 Hard | reservoir |
| Clinton, Maryland | 178 mg/L | 9.7 ppt | 🟠 Hard | reservoir |
| Greater Upper Marlboro, Maryland | 121.5 mg/L | 6.5 ppt | 🟠 Hard | reservoir |
| Camp Springs, Maryland | 103 mg/L | 5.5 ppt | 🟡 Moderately Hard | reservoir |
| Forestville, Maryland | 95 mg/L | 5 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Rosaryville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rosaryville | 178 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Rosaryville's Water Unique?
Local geology and source profile
Rosaryville, Maryland, in Prince George's County — a Prince George's County unincorporated community adjacent to Upper Marlboro and Camp Springs in the southern DC Maryland suburbs — receives its water from WSSC Water, drawing from the Patuxent River and Potomac River through the central Maryland distribution.
The hard 178 mg/L hardness and TDS of 440.5 mg/L reflect the southern Prince George's County supply's hard blended character — the Patuxent watershed supply blends with Potomac River supply in the southern county zone, and the Cretaceous Patuxent Formation and Precambrian Baltimore Gneiss are largely insoluble, but the Potomac River supply contributes calcareous mineral content from the Appalachian headwaters (compare Upper Marlboro MD: 173/429 in Prince George's County comparable; Camp Springs MD: 182/451 in Prince George's County comparable; Rosaryville consistent hard from the same Prince George's County Patuxent River Cretaceous supply). The Patuxent/Potomac watershed — Cretaceous Patuxent Formation (insoluble — primary dilutant), Precambrian Baltimore Gneiss (insoluble — secondary dilutant), and Quaternary Coastal Plain alluvium (calcareous — TDS contributor).
At 178 mg/L with TDS 441, Rosaryville's water is hard — scale builds in appliances. Quarterly descaling is appropriate. The PFAS level of 9.7 ppt is very elevated — a certified filter with PFAS removal is strongly recommended. Review WSSC Water's annual water quality report.
Geology & Source: Rosaryville in Prince George's County draws from the WSSC Water on the Patuxent River supply (Prince George's County, central Maryland) — the Patuxent watershed draws from Cretaceous Patuxent Formation (insoluble) and Precambrian Baltimore Gneiss (insoluble) — Maryland Prince George's County Patuxent River Cretaceous supply produces hard water at 178 mg/L with TDS 440.5 mg/L.