How Public Water System Records Differ From Private Well Tests in What They Establish
When it comes to bacteria concerns in your household water, understanding the difference between public water system records and private well testing is crucial. Public water system records, such as those for the Anderson Water Department in Madison County, report data aggregated from multiple sampling points and times for the entire community served. These records offer a broad view of water quality trends but do not reflect the specific condition of your home’s water supply or plumbing system. In contrast, private well testing provides data specific to your home's water source and distribution, the only way to confirm your household’s actual bacteria presence.
What 'Detected,' 'Median,' and 'Range' Mean in the Sampling Record on This Page
The Anderson Water Department's records show one health-based violation among ten total entries related to public water sampling, but this does not automatically mean bacteria contamination is present or harmful in your household water. In public water records, the term 'detected' means that laboratory instruments have found bacteria or related indicators at a measurable level during sampling. A 'median' shows the middle value when multiple measurements are listed, reflecting typical conditions over time, while 'range' indicates the lowest and highest recorded levels. None of these terms on their own confirm the water is unsafe; they simply document observed values within the municipal system.
How Seasonal or Multi-Year Variation Shows in the Record (Dates and Ranges Given)
The water quality data for Anderson covers multiple sampling dates, including recent results up to the end of 2025. This timespan helps reveal seasonal and annual fluctuations, which may affect bacteria levels due to changing source water conditions, weather impact on surface water, and varying treatment responses. Such variation means that a single measurement should not be the sole basis for decisions. Instead, reviewing data ranges and patterns over seasons and years offers a better understanding of the water system’s behavior.
A Worked Example: Reading the Record’s Median and Range as a Homeowner Would
For example, although a health-based violation is listed once, the lead 90th percentile measured in late 2025 was very low, showing effective control in the distribution system. The treatment process codes recorded indicate multiple water purification steps are in use. If bacteria or coliform were detected at any point, these codes imply steps designed to reduce such biological contaminants are active. Still, for your household, only specific water testing will confirm bacteria presence. Public records guide your awareness but do not replace private evaluation.
How Sample Depth, Well Depth or Source Type Changes What a Reader Should Expect
Anderson’s water source is surface water, which typically requires robust treatment to control bacteria risks due to environmental exposure. This differs from private wells, which may be deeper or shallower and draw groundwater with different bacterial challenges. Surface water can fluctuate more with rainfall and runoff, so municipal systems often employ multiple processes to manage these factors. Knowing your home’s source and plumbing configuration helps in aligning any treatment solution to your specific needs.
When bacteria concerns arise, selecting appropriate equipment for your household requires confirming your actual water quality. The Fleck Bacteria & Coliform (Well) Filter ships ready to configure and is engineered to address bacteria and coliform concerns effectively once your water’s demand figure is known. This direct-purchase system offers a targeted option to reduce bacterial presence when testing indicates it is needed in your household water.
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 ANDERSON WATER DEPARTMENT (IN5248002), surface water supply, serving 55212 people: 1 health-based violations of 10 total; lead 90th percentile 0.0014 mg/L
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