How does South Gate's water compare to the national average?

The USA national average is 151 mg/L. South Gate (≈ 120–179 mg/L) is 1 mg/L softer than average.

South Gate Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

8.2

neutral = 7.0

Lead

0.008 mg/L

✓ Below action level

TDS

448.8 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 South Gate, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In South Gate	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 South Gate compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ South Gate, Maryland	≈ 120–179 mg/L	9.8 ppt	🟠 Hard	reservoir
Glen Burnie, Maryland	≈ 120–179 mg/L	7.5 ppt	🟠 Hard	reservoir
Pasadena, Maryland	≈ 120–179 mg/L	10.3 ppt	🟠 Hard	reservoir
Ferndale, Maryland	≈ 120–179 mg/L	10.7 ppt	🟠 Hard	reservoir
Severn, Maryland	≈ 120–179 mg/L	7.7 ppt	🟠 Hard	groundwater

National Benchmark

How South Gate compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ South Gate	≈ 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 South Gate's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 448.8 mg/LpH: 8.2

South Gate, Maryland, an unincorporated community in Anne Arundel County near Glen Burnie, receives its water from the Anne Arundel County Department of Public Works Bureau of Utility Operations. The utility serves over 600,000 residents, drawing primarily from groundwater in the Coastal Plain aquifers, supplemented by surface water from the Patuxent River and Susquehanna River via Washington Suburban Sanitary Commission (WSSC) interties. Key treatment facilities include the Patuxent Filtration Plant and several county-managed wellfields, with distribution covering South Gate's residential and commercial areas.

The supply originates within the Patuxent River watershed and local groundwater basins of Maryland's Coastal Plain physiographic province. Underlying formations consist of unconsolidated Tertiary and Quaternary sediments — sands, clays, and shell beds rich in carbonates including calcite, aragonite, and magnesium calcite. Dissolution of these carbonate materials elevates calcium and magnesium in groundwater, yielding a hard supply with significant mineral content characteristic of the region.

Hard water promotes scale buildup in pipes, water heaters, dishwashers, washing machines, coffee makers, and kettles, causing spotting on glassware and diminished soap lathering. Routine maintenance including annual water heater flushing, vinegar descaling, and hard-water detergents helps mitigate effects. A whole-home water softener is recommended to prevent long-term damage and improve appliance longevity. The county maintains EPA compliance for pH (7.0–8.5), lead and copper below action levels via corrosion control, and disinfection byproducts; treatment includes filtration, chlorination, and fluoridation at plants like Patuxent.

Geology & Source: Anne Arundel County Coastal Plain aquifers of marine origin; Tertiary and Quaternary sediments with carbonate-rich shell beds — calcite, aragonite, and magnesium calcite — dissolve to produce hard, mineral-rich groundwater

Other Maryland Water Reports

Glen Burnie

≈ 120–179 mg/L

🟠 Hard

Pasadena

≈ 120–179 mg/L

🟠 Hard

Ferndale

≈ 120–179 mg/L

🟠 Hard

Severn

≈ 120–179 mg/L

🟠 Hard

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

Frequently Asked Questions

Is South Gate's water safe to drink?

Yes. South Gate'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 South Gate?

At ≈ 120–179 mg/L (Hard), South Gate'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 South Gate compare to the USA average?

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