Westbrook Water Hardness & Quality Report (2026)
Water Hardness
1.8 grains per gallon
Source
reservoir
pH Level
7.3
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
57.3 mg/L
Est. Daily Cost
$0.08
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 Westbrook, your appliances are currently losing 4% efficiency due to mineral buildup.
| Appliance | In Westbrook | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.6 yrs | 8.5 yrs | — |
| Washing Machine | 12.5 yrs | 12 yrs | — |
| Water Heater | 14.4 yrs | 15 yrs | -4% |
Regional Water Comparison
How Westbrook compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Westbrook, Maine | 30.5 mg/L | 3 ppt | 🟢 Soft | reservoir |
| South Portland Gardens, Maine | 77 mg/L | 5.2 ppt | 🟡 Moderately Hard | reservoir |
| West Scarborough, Maine | 29.5 mg/L | 3 ppt | 🟢 Soft | reservoir |
| Portland, Maine | 52.5 mg/L | 4.1 ppt | 🟢 Soft | reservoir |
| South Portland, Maine | 76.5 mg/L | 5.2 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Westbrook compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Westbrook | 30.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Westbrook's Water Unique?
Local geology and source profile
Westbrook, Maine, in Cumberland County — a Cumberland County city adjacent to Portland and South Portland in the Greater Portland metro of southern Maine — receives its municipal water from the Portland Water District (PWD), drawing from Sebago Lake (Cumberland County) — one of the cleanest and deepest lakes in the eastern United States.
The extremely soft 30.5 mg/L hardness and very low TDS of 57.3 mg/L reflect Sebago Lake's pristine southern Maine granitic watershed. Sebago Lake drains the Southern Maine Upland — Precambrian Sebago Granite (insoluble white granite — the dominant regional bedrock), Ordovician Cape Elizabeth Formation (siliceous schist — insoluble), and Pleistocene glacial outwash sand and gravel (pure silica). Sebago Lake is essentially distilled water from a granitic watershed — one of the softest public water supplies in the entire USA.
At 30.5 mg/L, Westbrook's water is essentially distilled — no scale ever forms, soap lathers maximally, and appliances achieve theoretical maximum lifespan. No descaling is ever needed. The PFAS level of 3.0 ppt warrants a certified drinking water filter — the Brunswick Naval Air Station (Cumberland County — AFFF in the Androscoggin watershed), the Greater Portland industrial corridor, and the southern Maine PFAS background contribute to Westbrook's readings at trace levels.
Geology & Source: Westbrook in Cumberland County draws from Portland Water District on Sebago Lake (Cumberland County, Maine) — Sebago Lake drains the Southern Maine Upland (Precambrian Sebago Granite, Ordovician Cape Elizabeth Formation schist) — Maine Cumberland County Precambrian granitic crystalline watershed produces extremely soft water at 30.5 mg/L with very low TDS 57.3 mg/L in this Cumberland County Maine city.