The aquifer 120FLRDL in Glynn County, GA, serves as the groundwater source for many residential wells. Water drawn from depths of approximately 1100 to 2720 feet emerges through well pumps to household taps, carrying with it dissolved minerals and particulates characteristic of this deep geological formation.

Seasonal and Multi-Year Variation in Specific Conductance

Range of Specific Conductance Over Time

Around Glynn County, USGS sampling from August 2010 through February 2026 reveals specific conductance in groundwater fluctuates between 256 and 22000 µS/cm. These fluctuations reflect natural changes rather than sudden contamination events.

Median Value Stability

The median specific conductance recorded is 3000 µS/cm, indicating a relatively consistent mineralization level in the aquifer despite occasional variation.

Changes in Water Quality at the Tap After Treatment

Reduction of Sediment from Well Pump Intake

Using the Autotrol Sediment From the Well Pump Filter helps remove particulate matter entering at the pump, improving clarity and reducing sediment deposits in plumbing fixtures.

Impact on Household Fixtures

After filtering, water clarity improves, which helps maintain the performance and longevity of appliances sensitive to sediment.

Sampling Data Volume and Significance

Sample Size and Sampling Wells

Data comes from 165 samples collected from 10 individual wells in Glynn County, providing a robust overview of the aquifer’s water quality.

Interpreting Small Sample Sets

Smaller or isolated samples can misrepresent aquifer conditions, so relying on this comprehensive data set offers more reliable guidance.

Influence of Well Depth and Source Type

Variation by Well Depth

Wells sampled range from 1100 to 2720 feet deep; deeper wells tend to access water with distinctive mineral profiles affecting conductance and sediment characteristics.

Source Type Considerations

The type and geological composition of the aquifer influence sediment composition, which in turn affects what needs to be filtered at the pump.

Origin of Specific Conductance in Groundwater

Geological Sources

In Glynn County, specific conductance arises from dissolved minerals naturally present in the aquifer strata, not from contamination.

Relationship to Sediment Presence

While conductance measures dissolved ions, sediment relates to suspended particles; both may coexist but represent different water quality aspects.

Comparing Glynn County’s Data with Neighbouring Areas

Regional Differences in Conductance

Nearby counties may show different conductance patterns due to varied geology, but direct comparison should be done cautiously to avoid overinterpreting these differences.

Implications for Sediment Concerns

Understanding local data is essential since neighbouring regions’ records do not directly determine your well’s quality.

This summary is based on 165 specific conductance samples collected from 10 wells located in Glynn County’s 120FLRDL aquifer between 2010 and 2026, as provided by the US Geological Survey groundwater monitoring program.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2026-02-05. These figures describe groundwater sampled in this area. They are not a test of any individual private well - only a test of that well can establish its own water.

On record: U.S. Geological Survey sampling of Specific conductance in the 120FLRDL aquifer (Glynn County): 165 results from 10 wells, median 3000.0 uS/cm, range 256.0-22000.0 uS/cm; none above any federal threshold