How does Kennesaw's water compare to the national average?

The USA national average is 151 mg/L. Kennesaw (≈ 0–59 mg/L) is 121 mg/L softer than average.

Kennesaw Water Hardness & Quality Report (2026)

Water Hardness

soft

~0–59 mg/L

Soft

estimated · not lab-verified

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

$0.08

energy & soap waste

Source: See methodology section below · Updated 2026

soft~0–59 mg/LSoft · est.

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 4% efficiency due to mineral buildup.

Appliance	In Kennesaw	Soft Water City	Efficiency Loss
Kettle	8.2 yrs	8.5 yrs	-4%
Washing Machine	11.5 yrs	12 yrs	-4%
Water Heater	14.4 yrs	15 yrs	-4%

Regional Water Comparison

How Kennesaw compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Kennesaw, Georgia	≈ 0–59 mg/L	5.8 ppt	🟢 Soft	reservoir
Acworth, Georgia	≈ 0–60 mg/L	8.6 ppt	🟢 Soft	reservoir
Marietta, Georgia	≈ 120–179 mg/L	24 ppt	🟠 Hard	reservoir
Woodstock, Georgia	≈ 0–60 mg/L	124.5 ppt	🟢 Soft	reservoir
Smyrna, Georgia	72 mg/L	7.7 ppt	🟡 Moderately Hard	reservoir

National Benchmark

How Kennesaw compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Kennesaw	≈ 0–59 mg/L	🟢 None
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Kennesaw's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 198.8 mg/LpH: 7.7

Cobb County Water System (CCWS) serves Kennesaw, Georgia, providing water to over 750,000 residents across Cobb County and surrounding areas. The primary water source is the Chattahoochee River, supplemented by groundwater reserves. The utility operates multiple treatment plants and distribution infrastructure serving residential, commercial, and industrial customers in the northern Atlanta metropolitan area. Conventional treatment including coagulation, sedimentation, filtration, and chlorination ensures safe delivery throughout the service area.

The Chattahoochee River watershed drains the southern Appalachian region and flows through the Georgia Piedmont, where Kennesaw is located. The underlying geology consists of Piedmont metamorphic rocks — primarily gneiss, schist, and granitic formations — characteristic of the Precambrian to Paleozoic crystalline basement. This geology has low mineral solubility, and the river's flow through similar formations upstream results in naturally soft water with low concentrations of dissolved calcium and magnesium throughout the supply.

Kennesaw's soft water supply means minimal scale buildup in pipes, water heaters, and appliances. Residents typically experience good soap lathering and reduced mineral deposits on fixtures, and water softening is not essential for most households. The soft water is generally gentler on plumbing systems and reduces maintenance costs associated with mineral accumulation. Cobb County Water System maintains pH levels around 7.5–7.6 and alkalinity near 22–25.5 mg/L; the system reports two contaminants above EPA health-based guidelines (MCLGs), though all parameters meet federal legal limits (MCLs).

Geology & Source: Georgia Piedmont crystalline basement — gneiss, schist, and granitic formations; low mineral solubility of Precambrian to Paleozoic metamorphic bedrock combined with Chattahoochee River sourcing produces naturally soft water

Other Georgia Water Reports

Acworth

≈ 0–60 mg/L

🟢 Soft

Marietta

≈ 120–179 mg/L

🟠 Hard

Woodstock

≈ 0–60 mg/L

🟢 Soft

Smyrna

72 mg/L

🟡 Moderately Hard

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Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Kennesaw's water safe to drink?

Yes. Kennesaw's water meets all federal safety standards. The hardness is ≈ 0–59 mg/L (Soft), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Kennesaw?

Kennesaw's water is soft at ≈ 0–59 mg/L. A water softener is generally not necessary, though a carbon filter can improve taste and remove any remaining chlorine.

How does Kennesaw compare to the USA average?

The USA national average is 151 mg/L. Kennesaw (≈ 0–59 mg/L) is 121 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Kennesaw is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

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.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

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.

Measured

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.

Modelled

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.

Calculated

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.