Saint Simon Mills Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

7.8

neutral = 7.0

Lead

0.001 mg/L

✓ Below action level

TDS

131.1 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 Simon Mills, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Saint Simon Mills	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 Simon Mills compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Saint Simon Mills, Georgia	≈ 120–179 mg/L	3.8 ppt	🟠 Hard	reservoir
Saint Simons Island, Georgia	≈ 120–179 mg/L	3.8 ppt	🟠 Hard	groundwater
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 Simon Mills compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Saint Simon Mills	≈ 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 Simon Mills's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 131.1 mg/LpH: 7.8

The Brunswick-Glynn County Joint Water and Sewer Commission (JWSC) provides drinking water to Saint Simons Island and other parts of Glynn County, Georgia. Their supply comes entirely from the Floridian Aquifer, a significant underground source. The JWSC's main office is located at 1703 Gloucester Street, Brunswick, GA 31520. According to the utility, their water consistently meets or surpasses all state and federal drinking water standards. The commission is dedicated to maintaining high water quality for its customers.

The Floridian Aquifer is the sole source for Saint Simons Island's water. This extensive underground formation is composed of Tertiary-age limestone and dolomite. Because this geological layer naturally contains substantial amounts of dissolved minerals, specifically calcium and magnesium, the water drawn from it is characteristically hard. This is a common trait for water sources in the coastal Georgia region, influenced by the underlying geology.

Homeowners in this area will likely notice scale forming on faucets, inside coffee makers, and on dishwashers. Spotting on dishes and windows after washing is also a common consequence of this mineral content. Installing a whole-house water softening system or an ion-exchange treatment could significantly reduce these issues. For smaller tasks, using white distilled vinegar as a rinse aid in your dishwasher or to clean fixtures can help manage buildup. While inconvenient, these minerals are not a health hazard; in fact, calcium and magnesium are beneficial to the diet.

Geology & Source: Floridian Aquifer limestone and dolomite; high calcium and magnesium content cause hardness

Other Georgia Water Reports

Saint Simons Island

≈ 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 Simon Mills's water safe to drink?

Yes. Saint Simon Mills'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 Simon Mills?

At ≈ 120–179 mg/L (Hard), Saint Simon Mills'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 Simon Mills compare to the USA average?

The USA national average is 151 mg/L. Saint Simon Mills (≈ 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 Simon Mills 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.