Understanding 'Detected,' 'Median,' and 'Range' in PFAS Sampling for District Of Columbia
Public water system data for Joint Base Anacostia - Bolling in District Of Columbia County is collected under federal surveys like UCMR5, which measure PFAS compounds at points serving thousands of residents. Terms such as "detected" refer to any measurement above a defined reporting level, not a violation or safety concern. "Median" values indicate the middle concentration among detections, reflecting typical presence in samples, while "range" describes the spread between the lowest and highest detected values. For example, PFHxA and PFPeA were detected in some samples, though always below federal maximum contaminant levels (MCLs) to be enforced in 2024. This summarized data illustrates general regional water quality but does not define conditions at any single household tap.
Questions Unique to Commercial or Industrial Operators Versus Household Concerns
Commercial or industrial users often need data on site-specific PFAS concentrations, multiple source points, or process water uses, influencing different treatment scale and regulatory compliance considerations. Residential users focus more on daily consumption and aesthetic impact for a single household or family. While businesses might evaluate potential liability or product contamination risks, households typically prioritize treatment capacity aligned with household demand and ease of integration with home plumbing systems, given the data from the local public system.
How Sampling Depth, Well Depth, and Water Source Type Affect PFAS Expectations
The public water system at Joint Base Anacostia - Bolling uses surface water, which can have different PFAS profiles than groundwater or deeper wells. Shallow sources may respond faster to environmental contamination or changes, while deeper wells might show more filtered or stable concentrations. Sampling depth and method impact reported PFAS levels; surface-level sampling better represents the water before home plumbing influences. Therefore, households served from this surface source can expect water characteristics similar to those in the system record, but local variations remain possible due to distribution system factors.
The Influence of Sample Size and Number of Wells on Data Confidence
District Of Columbia's record for this system relies on 16 samples analyzed for each PFAS compound, representing over 2,300 connections and nearly 20,000 people. While this sample number provides a reasonable regional trend, it remains limited for pinpointing fluctuations or rare spikes in individual locations. Small sample sizes or fewer wells generally reduce confidence in representing the entire service area. Household users should recognize that these data provide an overview rather than a precise prediction for their specific home supply.
Considerations for Larger Households, Second Homes, or Seasonal Properties
Water usage patterns affect the choice of treatment equipment. Larger families may require systems with greater flow capacity or filter longevity, while seasonal properties with intermittent use may benefit from solutions that remain effective after periods of stagnation. Understanding how your household's water demand compares to the average connection served by the public system helps guide equipment selection. The public sampling data informs about general PFAS presence but does not adjust treatment needs based on individual consumption or usage frequency.
The Role of Plumbing Materials and Age Separate from Source Water
Plumbing materials and the age of household pipes can influence water quality independently from source water PFAS levels. Older pipes may introduce metals or affect taste and odor, which are unrelated to PFAS. Distribution system improvements or household plumbing replacements can alter water chemistry before it reaches the tap. Awareness of these factors helps homeowners differentiate between source water contaminants and plumbing-related issues, enabling targeted water treatment choices.
For households in District Of Columbia considering options for filtering PFAS compounds detected in regional public water records, the C-Series PFAS Forever Chemicals Filter offers a documented solution designed to handle residential water demand. This system ships ready to configure and is engineered to address the range of PFAS compounds found in this area, matching the needs of typical household consumption patterns.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2023-12-18. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR5 monitoring (2023-2025) for JOINT BASE ANACOSTIA - BOLLING (DC0000004), DC: 160 results across 10 listed contaminants, 14 detections above the reporting level; compared with the applicable federal MCL, none above