Green Valley Water Hardness & Quality Report (2026)
Water Hardness
9.8 grains per gallon
Source
reservoir
pH Level
8.1
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
402.4 mg/L
Est. Daily Cost
$0.45
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 Green Valley, your appliances are currently losing 22% efficiency due to mineral buildup.
| Appliance | In Green Valley | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4 yrs | 8.5 yrs | -53% |
| Washing Machine | 7.4 yrs | 12 yrs | -38% |
| Water Heater | 8.9 yrs | 15 yrs | -41% |
Regional Water Comparison
How Green Valley compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Green Valley, Maryland | 168.5 mg/L | 9.2 ppt | 🟠 Hard | reservoir |
| Clarksburg, Maryland | 170 mg/L | 9.3 ppt | 🟠 Hard | reservoir |
| Damascus, Maryland | 96 mg/L | 5.1 ppt | 🟡 Moderately Hard | reservoir |
| Germantown, Maryland | 131 mg/L | 7.1 ppt | 🟠 Hard | reservoir |
| Ballenger Creek, Maryland | 109 mg/L | 5.8 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Green Valley compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Green Valley | 168.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Green Valley home
Shop water softeners on Amazon.com →
What Makes Green Valley's Water Unique?
Local geology and source profile
Green Valley, Maryland, in Frederick County — a Frederick County unincorporated community adjacent to Frederick and Mount Airy in north-central Maryland — receives its water from the Frederick County Water, drawing from the Monocacy River (Frederick County) through the north-central Maryland distribution.
The hard 168.5 mg/L hardness and TDS of 402.4 mg/L reflect the north-central Maryland Frederick County Monocacy supply's hard calcareous character — the Cambrian Tomstown Formation calcareous and Precambrian Catoctin Formation insoluble produce hard water at the Maryland Blue Ridge transition (compare Kemp Mill MD: 183/463 in Montgomery County comparable on the WSSC Potomac; Green Valley slightly softer from the Frederick County Monocacy calcareous draw). The Monocacy River at Frederick County — Cambrian Tomstown Formation (calcareous — primary hardness contributor), Precambrian Catoctin Formation (insoluble — dilutant), and Quaternary Monocacy alluvium (calcareous — TDS contributor).
At 168.5 mg/L with TDS 402, Green Valley's water is hard. A water softener is recommended to prevent scale buildup. A reverse osmosis system is advisable for drinking water. The PFAS level of 9.2 ppt warrants a certified drinking water filter — the Frederick County north-central Maryland military (Fort Detrick) and industrial corridor contribute to Green Valley's elevated readings.
Geology & Source: Green Valley in Frederick County is served by Frederick County Water drawing from the Monocacy River — the Monocacy watershed drains Cambrian Tomstown Formation (calcareous) and Precambrian Catoctin Formation (insoluble) — MD Frederick County Monocacy River Cambrian calcareous supply produces hard water at 168.5 mg/L with TDS 402.4 mg/L.