Kennesaw Water Hardness & Quality Report (2026)
Water Hardness
5.9 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
198.8 mg/L
Est. Daily Cost
$0.27
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 Kennesaw, your appliances are currently losing 13% efficiency due to mineral buildup.
| Appliance | In Kennesaw | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.3 yrs | 8.5 yrs | -26% |
| Washing Machine | 9.9 yrs | 12 yrs | -17% |
| Water Heater | 11.6 yrs | 15 yrs | -23% |
Regional Water Comparison
How Kennesaw compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Kennesaw, Georgia | 101 mg/L | 5.8 ppt | 🟡 Moderately Hard | reservoir |
| Acworth, Georgia | 137.5 mg/L | 8.6 ppt | 🟠 Hard | reservoir |
| Marietta, Georgia | 148 mg/L | 9.3 ppt | 🟠 Hard | reservoir |
| Woodstock, Georgia | 94.5 mg/L | 5.4 ppt | 🟡 Moderately Hard | reservoir |
| Smyrna, Georgia | 72 mg/L | 3.6 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Kennesaw compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Kennesaw | 101 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Kennesaw's Water Unique?
Local geology and source profile
Kennesaw, Georgia, in Cobb County — a major northwest Cobb County suburban and university community (Kennesaw is a significant northwest Atlanta suburb — home of Kennesaw State University, one of the fastest-growing universities in Georgia and the US, a major commuter and residential university with over 40,000 students), famous for the Kennesaw Mountain National Battlefield Park (the 2,965-acre Civil War battlefield park where the Battle of Kennesaw Mountain was fought in June 1864 — a major Union assault against Confederate positions in General Sherman's Atlanta Campaign), a diverse Cobb County community with a significant South Asian-American, Korean-American, and African-American population, and home of one of America's oldest gun ownership laws (the City of Kennesaw passed an ordinance in 1982 requiring heads of household to own a firearm — a frequently cited novelty ordinance) — draws its municipal water supply via the Cobb County–Marietta Water Authority. Water hardness in Kennesaw measures 101 mg/L — classified as moderately hard.
Kennesaw's moderate hardness reflects the northwest Cobb County Piedmont supply. The Cobb County–Marietta Water Authority draws from the Etowah River (draining the Precambrian–Paleozoic calcareous-poor Georgia Piedmont gneiss and schist). The supply produces the moderate 101 mg/L after effective treatment.
With hardness at 101 mg/L, Kennesaw residents encounter moderate scale accumulation. Monthly cleaning is recommended. Cobb County–Marietta Water Authority consistently delivers water meeting all Georgia EPD and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Etowah River (Canton–KSU area supply) via the City of Kennesaw Water Division (Cobb County–Marietta Water Authority) — the Cobb County northwest Georgia Atlanta suburban corridor (Precambrian–Paleozoic calcareous-poor Georgia Piedmont gneiss — the northwest Cobb County crystalline Piedmont; Etowah–Cobb County supply with treatment); moderately hard supply at 101 mg/L in Cobb County.