Lochearn Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
227.4 mg/L
Est. Daily Cost
$0.40
energy & soap waste
Source: See methodology section below · 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 Lochearn, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Lochearn | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Lochearn compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Lochearn, Maryland | ≈ 120–179 mg/L | 6.4 ppt | 🟠 Hard | reservoir |
| Woodlawn, Maryland | ≈ 120–179 mg/L | 6.9 ppt | 🟠 Hard | reservoir |
| Gwynn Oak, Maryland | ≈ 120–179 mg/L | 10 ppt | 🟠 Hard | reservoir |
| Pikesville, Maryland | ≈ 120–179 mg/L | 4.4 ppt | 🟠 Hard | reservoir |
| Milford Mill, Maryland | ≈ 120–179 mg/L | 10.4 ppt | 🟠 Hard | reservoir |
National Benchmark
How Lochearn compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Lochearn | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Lochearn's Water Unique?
Local geology and source profile
Lochearn is an unincorporated community in Baltimore County, Maryland, served by the Baltimore City Department of Public Works for its municipal water supply. The primary water source is the Loch Raven Reservoir, located on Gunpowder Falls, a major regional reservoir that supplies treated water to the surrounding area. Official water quality data specific to Lochearn could not be retrieved; residents seeking current information should contact the Baltimore County Department of Public Works directly or request the most recent Consumer Confidence Report from the serving utility. Records may also be found in the EPA SDWIS database.
The Loch Raven Reservoir watershed drains the Maryland Piedmont through Precambrian metamorphic rocks, including schists and gneisses, with moderate carbonate intercalations. These rock types contribute dissolved calcium and magnesium to the water as it passes through fractured bedrock and overburden, releasing alkaline earth minerals into surface runoff collected in the reservoir. The interaction of water with these calcareous mineral zones produces a moderately hard supply after reservoir storage and treatment, characteristic of Piedmont surface-water systems in this region.
Moderately hard water from the Loch Raven Reservoir system can cause scale deposits on water heaters, kettles, and dishwashers over time, reducing efficiency and requiring periodic maintenance. Vinegar descaling of appliances and faucet aerators is advisable to manage mineral accumulation. A water softener may benefit households experiencing visible deposits or reduced soap lathering. Because no detailed water quality data was available for Lochearn specifically, residents are encouraged to consult the serving utility's annual Consumer Confidence Report for current contaminant levels and treatment information.
Geology & Source: Baltimore County Piedmont; Precambrian metamorphic rocks — schists and gneisses with moderate carbonate intercalations — in Loch Raven Reservoir watershed on Gunpowder Falls; reservoir storage and treatment produce moderately hard water
Other Maryland Water Reports
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Frequently Asked Questions
Is Lochearn's water safe to drink?
Do I need a water softener in Lochearn?
How does Lochearn compare to the USA average?
Data Sources & Methodology
Water quality data for Lochearn is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.