Alpharetta Water Hardness & Quality Report (2026)
Water Hardness
4.3 grains per gallon
Source
reservoir
pH Level
7.4
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
113.1 mg/L
Est. Daily Cost
$0.19
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 Alpharetta, your appliances are currently losing 10% efficiency due to mineral buildup.
| Appliance | In Alpharetta | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.2 yrs | 8.5 yrs | -15% |
| Washing Machine | 10.9 yrs | 12 yrs | -9% |
| Water Heater | 12.7 yrs | 15 yrs | -15% |
Regional Water Comparison
How Alpharetta compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Alpharetta, Georgia | 73 mg/L | 3.8 ppt | 🟡 Moderately Hard | reservoir |
| Milton, Georgia | 84 mg/L | 4.6 ppt | 🟡 Moderately Hard | reservoir |
| Roswell, Georgia | 124.5 mg/L | 7.6 ppt | 🟠 Hard | reservoir |
| Johns Creek, Georgia | 84.5 mg/L | 4.6 ppt | 🟡 Moderately Hard | reservoir |
| Peachtree Corners, Georgia | 135 mg/L | 8.4 ppt | 🟠 Hard | reservoir |
National Benchmark
How Alpharetta compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Alpharetta | 73 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Alpharetta's Water Unique?
Local geology and source profile
Alpharetta, Georgia, in north Fulton County — one of Atlanta's most affluent northern suburbs and a major technology and corporate hub ('Technology City of the South') along Georgia 400 — draws its municipal water supply from the Chattahoochee River (Lake Sidney Lanier system) or local surface water via the City of Alpharetta Water and Sewer Division and Fulton County Water and Sewer, treating north Fulton County watershed water for the Alpharetta area. Water hardness in Alpharetta measures 73 mg/L — classified as moderately soft.
Alpharetta's soft supply reflects the north Georgia Piedmont and Blue Ridge crystalline watershed geology. The Chattahoochee River above Lake Sidney Lanier drains the Blue Ridge (Precambrian Grenville-age gneiss, Ordovician Murphy Marble zone — some calcareous input) and the Georgia Piedmont (Precambrian–Ordovician Cherokee metamorphic belt — mainly siliceous schist, quartzite, and biotite gneiss). The dominant north Georgia crystalline terrain is calcium-poor, producing naturally soft drainage. The moderately soft 73 mg/L at Alpharetta reflects the Chattahoochee–Lanier system's moderate mineral content from the Cherokee metamorphic belt's minor calcareous marble and calcsilicate formations.
With hardness at 73 mg/L, Alpharetta residents enjoy moderately soft water with minimal scale challenges. City of Alpharetta Water and Sewer Division and Fulton County Water and Sewer consistently deliver water meeting all Georgia EPD and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Etowah River (Lake Allatoona) and Chattahoochee River via the City of Alpharetta Water and Sewer Division and Fulton County Water and Sewer — the Georgia Blue Ridge–Piedmont crystalline terrain (Precambrian–Ordovician Cherokee metamorphic belt); moderately soft supply at 73 mg/L in Fulton County.