Elkridge Water Hardness & Quality Report (2026)
Water Hardness
9.9 grains per gallon
Source
reservoir
pH Level
8.1
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
403.6 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 Elkridge, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In Elkridge | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4 yrs | 8.5 yrs | -53% |
| Washing Machine | 7.3 yrs | 12 yrs | -39% |
| Water Heater | 8.8 yrs | 15 yrs | -41% |
Regional Water Comparison
How Elkridge compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Elkridge, Maryland | 169 mg/L | 9.2 ppt | 🟠 Hard | reservoir |
| West Elkridge, Maryland | 84 mg/L | 4.4 ppt | 🟡 Moderately Hard | reservoir |
| Hanover, Maryland | 193 mg/L | 10.6 ppt | 🔴 Very Hard | reservoir |
| Arbutus, Maryland | 87 mg/L | 4.6 ppt | 🟡 Moderately Hard | reservoir |
| Catonsville, Maryland | 119.5 mg/L | 6.4 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Elkridge compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Elkridge | 169 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Elkridge's Water Unique?
Local geology and source profile
Elkridge, Maryland, in Howard County — an unincorporated Howard County community adjacent to Columbia and Laurel at the Howard-Anne Arundel County line in central Maryland — receives its municipal water from Baltimore City Water or Howard County DPW, drawing from Loch Raven Reservoir (Gunpowder Falls, Baltimore County) through the central Maryland distribution system.
The hard 169 mg/L hardness and elevated TDS of 403.6 mg/L are harder than the north Baltimore Loch Raven communities (Lutherville-Timonium: 132.5 mg/L), reflecting Elkridge's position further downstream in the distribution system where the Cockeysville Marble calcareous input is more concentrated. The Loch Raven Reservoir (Gunpowder Falls) drains the Maryland Piedmont — Cambrian Cockeysville Marble (high purity crystalline limestone — primary hardness contributor), Precambrian Glenarm Group Gneiss (partially calcareous), and Cambrian Setters Formation (calcareous). The Cockeysville Marble calcareous dissolution produces the hard central Maryland Loch Raven supply.
At 169 mg/L, Elkridge's water is hard — scale builds steadily in kettles and appliances, dishwashers benefit from rinse aid, and water heaters should be descaled annually. Monthly descaling is recommended. The PFAS level of 9.2 ppt warrants a certified reverse osmosis drinking water filter — Aberdeen Proving Ground (Harford County — AFFF, in the Gunpowder Falls watershed above Loch Raven) and the Howard County central Maryland industrial corridor contribute to Elkridge's elevated readings.
Geology & Source: Elkridge in Howard County draws from Baltimore City Water on Loch Raven Reservoir (Howard County, north Maryland) — the reservoir drains the Maryland Piedmont (Cambrian Cockeysville Marble, Precambrian Glenarm Gneiss — calcareous) — Maryland Howard County Loch Raven Reservoir Piedmont calcareous watershed produces hard water at 169 mg/L with TDS 403.6 mg/L in this Howard County Maryland community.