What 'detected', 'median' and 'range' Mean in the Sampling Record on This Page
The U.S. Geological Survey sampled groundwater from 36 wells in Gloucester County’s aquifer 121CKKD between April 2010 and August 2026. These wells ranged from 14 to 162 feet deep. Across 144 results, nitrite was detected in 10 samples and below reporting limits in 134. The median nitrite concentration was 0.004 mg/L with a range from 0.001 to 0.012 mg/L. None of these results exceeded federal thresholds for nitrite. "Detected" means the measuring instruments found nitrite at a measurable level, but this does not imply a health violation. "Median" indicates the middle value of the data set, providing a central point of reference. "Range" shows the minimum and maximum measurements found during sampling. These figures describe the area’s aquifer water quality but do not define the level in any specific household well. A test of your own water is necessary to know your local nitrate conditions.
How to Judge Treatment Capacity Against the Household's or Facility's Daily Demand
When weighing two nitrate treatment approaches, consider your household’s daily water use and nitrate removal capacity. Treatment systems must match or exceed your peak water demand for effective nitrate reduction without flow reduction. Estimating daily consumption involves counting household members and typical water use for drinking, cooking, bathing, and laundry. Some filtration systems offer flow rates suited for average family sizes, while others can handle larger volumes. Understanding your household demand clarifies which system fits your water volume needs and ensures consistent nitrate control.
Which Fixtures, Appliances or Processes Are Affected First and Why
Nitrate presence primarily affects water used for drinking and cooking because ingestion is the main exposure route to concern. While nitrate levels in Gloucester County's aquifer are low relative to federal thresholds, households may still consider targeted treatment at point-of-use fixtures like kitchen faucets or whole-house systems if nitrate is a concern. Appliances such as ice makers or water dispensers connected to treated water will benefit from reduction efforts. Nitrate levels typically do not damage plumbing or appliances but addressing nitrate is primarily about health considerations, especially for infants and pregnant women.
What Changes for a Large Household, a Second Home, or a Seasonal Property
In larger households, or homes with multiple bathrooms and water users, treatment systems must handle higher volumes and more frequent water use. Larger flow capacities and more frequent maintenance cycles may be needed with increased demand. For second homes or seasonal properties, water may sit unused for extended periods, potentially affecting water quality. Systems designed for nitrate reduction can accommodate intermittent use but should be sized appropriately and maintained to avoid bacterial growth or filter degradation during low use periods. Knowing your property’s usage patterns helps determine the best treatment configuration.
How Seasonal or Multi-Year Variation Shows in the Record (Dates and Ranges Given)
Samples from 2010 to 2026 provide insight into long-term nitrate stability in Gloucester County’s aquifer 121CKKD. The detection of nitrite in only 10 out of 144 samples and consistently low median and range values indicate relatively stable nitrate conditions over time. This suggests that nitrate concentrations in the aquifer have not shown significant spikes or sustained elevations. However, natural fluctuations and land use changes can affect future nitrate levels. Periodic testing of your own water remains essential as local conditions may differ from regional records.
In summary, nitrate levels recorded in Gloucester County’s aquifer 121CKKD are low and stable, but individual well testing is necessary to confirm your household’s situation. Matching treatment capacity to your daily water demand and usage patterns helps select the best nitrate removal option. The Pentair Nitrate & Nitrite (Well) Filter ships ready to configure and offers a documented solution for reducing nitrate in well water.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2026-08-17. 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 Nitrite in the 121CKKD aquifer (Gloucester County): 144 results from 36 wells, median 0.004 mg/L, range 0.001-0.012 mg/L; none above any federal threshold
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