Understanding 'Detected,' 'Median,' and 'Range' in Water Sampling Data
It is often assumed that if bacteria are 'detected' in water data for an area, then every home has unsafe water. However, government water system records for La Vergne’s public water supply do not specify individual household conditions. 'Detected' means the presence of bacteria was measured in some samples, but it does not establish a violation or unsafe status for all consumers. Median and range values describe the pattern of measurements across multiple samples and times, providing a broad view of water quality in the system, not a precise statement about your home’s water.
What a Certified Laboratory Test Shows About Bacteria and How to Interpret Results
Certified lab tests for bacteria or coliform bacteria usually report whether samples meet health standards or show presence of these organisms. Such tests identify contamination levels in a specific sample from your well or tap at a particular time. Understanding these results requires knowing if a sample exceeded health-based limits which may require action. Official public water records list violations that prompt regulatory attention, but individual test results must come from your own water source analysis.
The Impact of Sample Depth, Well Depth, and Source Type on Expected Bacteria Levels
The La Vergne Water System draws from surface water, which can be more vulnerable to bacterial presence than groundwater sources. In residential settings, bacteria levels can differ significantly based on local factors like well depth or plumbing condition. Surface water as a source may require more rigorous treatment to reduce bacteria, while deeper wells often have natural protection. Sampling depths and locations influence the detection and concentration of bacteria, so one should expect variability depending on these factors.
Household Signs That May Indicate Bacteria Issues—and Those That Don’t
Awareness of possible bacterial contamination often arises from noticing water appearance changes, such as cloudiness, odd taste, or odors, or health symptoms like gastrointestinal distress. Yet, such symptoms are not definitive indicators of bacterial contamination in water. In La Vergne’s public water record, despite some health-based violations, the overall water system serves over 38,000 people and monitors bacteria levels regularly. To understand your household’s water condition, specific bacterial testing is necessary rather than relying on symptom assumptions alone.
How Bacteria Can Enter Water Sources and Distribution in La Vergne
In this region, surface water sources can be exposed to bacteria from runoff, wildlife, and human activity. The treatment and distribution system then impacts the bacterial content reaching homes. Distribution system integrity and treatment effectiveness play roles in controlling bacteria levels. Although EPA records show some health-based violations in La Vergne’s public system, these events are monitored, and corrective measures are required to protect public health. Individual households should consider testing to confirm their water safety status.
Addressing Bacteria in Household Water with the Pentair Bacteria & Coliform (Well) Filter
For homeowners concerned about bacteria in water, especially when testing shows presence or when local records indicate possible issues, the Pentair Bacteria & Coliform (Well) Filter offers a documented solution. This system ships ready to configure and can reduce bacteria levels, including coliform bacteria, helping ensure safer water for residential use. Testing your water before and after use of the system confirms its effectiveness tailored to your household’s needs.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2025-12-31. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA SDWIS record for LA VERGNE WATER SYSTEM (TN0000386), surface water supply, serving 38730 people: 4 health-based violations of 12 total; lead 90th percentile 0.001 mg/L