How to Interpret 'Detected,' 'Median,' and 'Range' in Bacteria Sampling
When a laboratory water test report shows bacteria, terms like 'detected,' 'median,' and 'range' describe the presence and variation of bacteria measurements within a water system over time and locations. 'Detected' means that an instrument or method found bacteria in a sample but does not mean a safety violation or fixed concentration. The 'median' is the middle value of all measurements taken, capturing a central tendency without implying any one sample matches it. The 'range' shows the lowest to highest bacterial presence recorded in tests across the system.
For Murfreesboro's public water system, which draws from surface water and serves over 110,000 people, these terms reflect broad system conditions, not any individual household's water. Only a direct test of your home's water can reveal its specific bacteria levels.
Commercial or Industrial Questions Beyond Household Concerns
Commercial or industrial water users often face additional questions such as the impact of bacteria on equipment longevity, process quality, and regulatory compliance at scale. They also consider disinfectant residuals, biofilm formation, and sampling frequency more intensively. These factors tend to be less immediate in residential water use, where the main focus is on safety for consumption and preventing bacterial contamination in faucets, showers, and appliances.
Progression of Checks: From Basic to Laboratory Testing
If existing water treatment equipment has failed, households should start with basic checks such as verifying any visible water quality changes like cloudiness or unusual taste, and ensuring fixtures are clean. Next, testing water at the tap with certified home kits can offer an initial indication of bacterial presence. For precise and legally valid results, collecting samples for a laboratory test is necessary. This step confirms if bacteria are present and, if so, what types and concentrations exist to guide treatment decisions.
Maintenance Expectations for the Autotrol Bacteria & Coliform (Well) Filter
The documented solution for bacterial concerns in residential water is the Autotrol Bacteria & Coliform Filter. This system ships ready to configure and requires a straightforward maintenance routine. Regular monitoring of filter performance, periodic media replacement as indicated by water quality or system guidelines, and basic cleaning tasks keep it operating effectively. Clear maintenance intervals help maintain treated water quality and minimize bacterial regrowth.
How Water Source and System Characteristics Affect Bacteria in Rutherford County
Murfreesboro’s public water supply is surface water based. Surface water sources are more exposed to environmental factors that can introduce bacteria compared to deep wells. Bacteria can enter both the source water and the distribution system through natural runoff, wildlife activity, or distribution system breaches. Seasonal variation may also influence bacterial levels. The depth or type of household water source further affects expectations: shallow wells may show different bacterial tendencies than the surface water supply.
Summary of Public Water System Records and Where to Confirm Details
The EPA’s public water system record for Murfreesboro Water Department confirms that this system serves over 110,000 people with surface water, with one EPA health-based violation noted in recent records. This record covers the entire system, not individual home taps. To understand your home's water condition precisely, testing your water is essential. For official information and updates from government records, consult EPA’s Water System Data online.
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 MURFREESBORO WATER DEPARTMENT (TN0000491), surface water supply, serving 114331 people: 1 health-based violations of 5 total; lead 90th percentile 0.0006 mg/L
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