Government groundwater sampling in Prince George's County, MD, within aquifer 211MGTY, detected radon-222 in three separate wells sampled between October and December 2016. The radon levels measured ranged from 33.0 to 188.0 picocuries per liter (pCi/L), with a median of 100.0 pCi/L. No measurement exceeded federal thresholds for radon concentration.

What to Write Down Before Seeking Treatment Advice

Record Your Water Source Type

Note whether your household water comes from a private well, a public supply, or a shared community system, as treatment needs differ accordingly.

Document Well Depth if Applicable

The sampled wells ranged from 155 to 607 feet deep; your well’s depth influences potential radon levels based on the local geological formation.

Gather Previous Water Quality Reports

Collect any available radon or general water quality tests previously conducted to provide context when discussing treatment options.

Order of Steps to Exclude Other Causes Before Lab Testing

Check for Known Local Water Source Changes

Identify if recent changes in water supply or well maintenance might influence test results or treatment choice.

Inspect for Plumbing Materials and Age

Older or certain types of plumbing can affect water quality independently from source radon levels (see further section below).

Consider Household Water Usage Patterns

Estimate daily water consumption to align treatment capacity effectively if radon removal is necessary.

Arrange Laboratory Testing for Your Own Water

Only a laboratory test on your specific water supply can establish your radon concentration and confirm treatment needs.

Additional Questions from Commercial or Industrial Perspective

Assess Higher Volume Treatment Capacity

Commercial settings require larger scale radon management reflecting greater water throughput.

Consider Regulatory Compliance for Non-Residential Use

Unlike household use, commercial water systems might be subject to specific state or federal radon standards beyond typical residential concerns.

Interpreting 'Detected', 'Median', and 'Range' in Radon Sampling Data

'Detected' Means the Radon Was Measured, Not a Violation

All three samples detected radon, showing it is present but not above federal thresholds.

'Median' Indicates the Middle Value of the Three Samples

At 100.0 pCi/L the median concentrates half of the values above and half below, summarizing typical area levels.

'Range' Shows the Spectrum of Recorded Values

The detected range from 33.0 to 188.0 pCi/L illustrates variability among wells in the same area and aquifer.

Role of Plumbing Material and Age Separate from Source Water

Plumbing Components Can Affect Radon Levels Passing Through

Certain older pipe materials or fixtures may interact with radon differently but do not create radon.

Plumbing Does Not Add Radon—It Only Transmits It

Radon originates from groundwater; plumbing influences whether radon gas might accumulate but not its source concentration.

To move forward, order a laboratory radon test on your household water supply. If the results show radon levels that align with concerns about inhalation or ingestion exposure, a filtration system such as the C-Series Radon in Water Filter, which ships ready to configure for home use, can address the radon effectively. This single test result is the definitive step to determine your need for treatment and the appropriate equipment class for your household.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2016-12-20. 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 Radon-222 in the 211MGTY aquifer (Prince George's County): 3 results from 3 wells, median 100.0 pCi/L, range 33.0-188.0 pCi/L; none above any federal threshold