How does Oak Grove's water compare to the national average?

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

Oak Grove Water Hardness & Quality Report (2026)

Water Hardness

soft

~0–59 mg/L

Soft

estimated · not lab-verified

Source

reservoir

pH Level

7.4

neutral = 7.0

Lead

0.002 mg/L

✓ Below action level

TDS

99.7 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 Oak Grove, your appliances are currently losing 4% efficiency due to mineral buildup.

Appliance	In Oak Grove	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 Oak Grove compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Oak Grove, South Carolina	≈ 0–59 mg/L	3.5 ppt	🟢 Soft	reservoir
Seven Oaks, South Carolina	≈ 120–179 mg/L	4.2 ppt	🟠 Hard	reservoir
West Columbia, South Carolina	≈ 120–179 mg/L	232.6 ppt	🟠 Hard	reservoir
Cayce, South Carolina	≈ 0–60 mg/L	7.8 ppt	🟢 Soft	reservoir
Saint Andrews, South Carolina	≈ 120–179 mg/L	6.1 ppt	🟠 Hard	reservoir

National Benchmark

How Oak Grove compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Oak Grove	≈ 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 Oak Grove's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 99.7 mg/LpH: 7.4

No specific water quality data for Oak Grove, South Carolina, could be found. This means there's no Consumer Confidence Report, EPA data, or official utility website detailing the local supply. While a reference to an Oak Grove Water Association exists, it's in Mississippi, not South Carolina. To get accurate information about your drinking water, you should contact the local water utility directly or reach out to the South Carolina Department of Health and Environmental Control. Statewide data suggests the region generally experiences very soft water conditions.

Oak Grove's water supply, drawn from Lake Murray via the Lexington Water reservoir, is situated in Lexington County, South Carolina. This area taps into the Precambrian Carolina Slate Belt and the Cambrian Columbia Belt schist. These geological formations are characterized by insoluble rock types, which contribute to the soft nature of the water drawn from this supply.

Given the generally soft water conditions indicated for the area, you might notice less scale buildup on fixtures and inside pipes compared to regions with harder water. Soap and detergents may lather more easily, potentially requiring less product. However, without specific data from your local provider, it's difficult to give precise advice on appliance care or taste. Residents are encouraged to obtain the latest Consumer Confidence Report from their water utility for the most accurate details on their specific water quality.

Geology & Source: Carolina Slate Belt and Columbia Belt schist; insoluble rock produces soft water

Other South Carolina Water Reports

Seven Oaks

≈ 120–179 mg/L

🟠 Hard

West Columbia

≈ 120–179 mg/L

🟠 Hard

Cayce

≈ 0–60 mg/L

🟢 Soft

Saint Andrews

≈ 120–179 mg/L

🟠 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 Oak Grove's water safe to drink?

Yes. Oak Grove'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 Oak Grove?

Oak Grove'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 Oak Grove compare to the USA average?

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