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

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

Norcross Water Hardness & Quality Report (2026)

Water Hardness

soft

~0–59 mg/L

Soft

estimated · not lab-verified

Source

groundwater

pH Level

7.1

neutral = 7.0

Lead

0.009 mg/L

✓ Below action level

TDS

55 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 Norcross, your appliances are currently losing 4% efficiency due to mineral buildup.

Appliance	In Norcross	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 Norcross compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Norcross, Georgia	≈ 0–59 mg/L	9.2 ppt	🟢 Soft	groundwater
Peachtree Corners, Georgia	135 mg/L	8.4 ppt	🟠 Hard	reservoir
Doraville, Georgia	≈ 0–60 mg/L	8.1 ppt	🟢 Soft	reservoir
Tucker, Georgia	≈ 0–60 mg/L	6.5 ppt	🟢 Soft	reservoir
Lilburn, Georgia	≈ 0–60 mg/L	4.6 ppt	🟢 Soft	reservoir

National Benchmark

How Norcross compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Norcross	≈ 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 Norcross's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 55 mg/LpH: 7.1

The Gwinnett County Department of Water Resources (DWR) supplies water to Norcross and surrounding areas in Gwinnett County, Georgia. Primary sources include surface water from the Lake Lanier reservoir on the Chattahoochee River and supplementary groundwater. Treatment occurs at the T. Jackson King III Water Production Plant and other facilities, serving over 1 million residents across 437 square miles. Norcross, fully within this service area, receives treated potable water meeting federal standards.

The Upper Chattahoochee River watershed spans the Blue Ridge and Piedmont physiographic provinces, featuring ancient Precambrian gneiss, schist, and amphibolite with thin saprolite soils, low in soluble carbonates. Groundwater taps shallow fractured bedrock aquifers, while surface supplies reflect runoff from granitic terrains. This non-karst setting yields a soft supply with low mineral content, shaped by weathering-resistant siliceous rocks rather than calcium-rich limestones.

When it comes to appliances and plumbing, the soft water in Norcross is a blessing. With minimal scale risk, you don't have to worry about limescale buildup in your dishwasher, washing machine, or faucets. Gwinnett DWR reports consistent compliance with EPA standards, and routine maintenance like annual descaling is all you need to keep your systems running smoothly. You can even enjoy the benefits of naturally scale-free water without needing a water softener, which could over-soften and risk corrosion. Plus, soap lathers easily, and fixtures stay cleaner, making everyday life a little easier.

Geology & Source: Upper Chattahoochee River Basin - Coastal Plain sediments; Floridan aquifer system margins; Piedmont region's metamorphic gneiss and schist formations; low-carbonate, silica-rich rocks

Other Georgia Water Reports

Peachtree Corners

135 mg/L

🟠 Hard

Doraville

≈ 0–60 mg/L

🟢 Soft

Tucker

≈ 0–60 mg/L

🟢 Soft

Lilburn

≈ 0–60 mg/L

🟢 Soft

Report an Issue

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 Norcross's water safe to drink?

Yes. Norcross'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 Norcross?

Norcross'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 Norcross compare to the USA average?

The USA national average is 151 mg/L. Norcross (≈ 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 Norcross 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.