Saint Simons Island Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

7.5

neutral = 7.0

Lead

0.001 mg/L

✓ Below action level

TDS

132 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · 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 Saint Simons Island, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Saint Simons Island	Soft Water City	Efficiency Loss
Kettle	6.8 yrs	8.5 yrs	-20%
Washing Machine	9.6 yrs	12 yrs	-20%
Water Heater	12 yrs	15 yrs	-20%

Regional Water Comparison

How Saint Simons Island compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Saint Simons Island, Georgia	≈ 120–179 mg/L	3.8 ppt	🟠 Hard	groundwater
Saint Simon Mills, Georgia	≈ 120–179 mg/L	3.8 ppt	🟠 Hard	reservoir
Brunswick, Georgia	210 mg/L	0 ppt	🔴 Very Hard	groundwater
St. Marys, Georgia	≈ 180+ mg/L	0 ppt	🔴 Very Hard	groundwater
Kingsland, Georgia	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater

National Benchmark

How Saint Simons Island compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Saint Simons Island	≈ 120–179 mg/L	🟠 Moderate
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Saint Simons Island's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 132 mg/LpH: 7.5

The St. Simons Island water supply reaches about 24,172 residents in Glynn County, Georgia. The St. Simons Island Water Company draws its water primarily from the Floridian Aquifer, a significant groundwater source for the region. All treatment and distribution operations are handled at their facility located at 161 South Harrington Road. Water quality is monitored by the Glynn County Health Department, which also issues advisories for local beaches.

The water originates from the Floridian Aquifer, a geological formation dating back to the Tertiary period. This aquifer is primarily composed of limestone and dolomite, which naturally dissolve minerals like calcium and magnesium into the groundwater. These dissolved minerals are the reason for the water's characteristic hardness in this coastal Georgia region, which features extensive karst topography.

Homeowners on St. Simons Island may notice scale buildup on fixtures, in pipes, and inside appliances like coffee makers and water heaters. You might also find that soaps and detergents don't lather as effectively. To combat mineral deposits and help your appliances last longer, a water softening system is often a good investment. The municipal supply has been tested for contaminants including NDMA, nitrates/nitrites, and chlorite, with the utility reporting that all state and federal standards are met or exceeded.

Geology & Source: Floridian Aquifer; Tertiary limestone and dolomite formations yield hard water high in calcium and magnesium carbonates

Other Georgia Water Reports

Saint Simon Mills

≈ 120–179 mg/L

🟠 Hard

Brunswick

210 mg/L

🔴 Very Hard

St. Marys

≈ 180+ mg/L

🔴 Very Hard

Kingsland

≈ 120–179 mg/L

🟠 Hard

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 Saint Simons Island's water safe to drink?

Yes. Saint Simons Island's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Saint Simons Island?

At ≈ 120–179 mg/L (Hard), Saint Simons Island's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does Saint Simons Island compare to the USA average?

The USA national average is 151 mg/L. Saint Simons Island (≈ 120–179 mg/L) is 1 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 Saint Simons Island 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.