How many samples and wells stand behind the figures, and what a small sample means
The public water system serving Avon, Bristol, Farmington, and Plainville in Hartford County, known as CTWC - Unionville System, provides treated surface water to more than 14,600 residents through over 6,300 connections. The water quality data available comes from system-wide sampling rather than individual private wells. Each data point represents aggregated results from samples taken across the distribution system, reflecting system-level performance rather than any single household's water. A limited number of samples, especially for certain measures like lead in plumbing, means the figures give a broad view but cannot pinpoint specific household conditions.
How the treated water differs at the tap once the documented technology is in place
When households experience that existing equipment cannot keep up with safe drinking needs, adding a treatment stage like the C-Series Safe Drinking Water Filter can reduce contaminants that may remain after municipal treatment. The system record for CTWC - Unionville shows advanced treatment processes are used before water reaches taps, but secondary filtering at the sink or point of use can further improve quality by removing residual particulate matter or low-level impurities. The C-Series System ships ready to configure, complementing municipal treatment and safeguarding water just before it is consumed.
How to judge treatment capacity against the household's or facility's daily demand
To determine if your current water treatment setup is meeting your household’s volume needs, compare daily water use with the capacity of your equipment. Larger families or frequent use of water-intensive appliances increase demand and may overwhelm some treatment systems. The C-Series Safe Drinking Water Filter accommodates typical residential flow rates, but confirming your household’s average daily consumption helps ensure the filter can maintain performance without bottlenecks or reduced effectiveness during peak use.
What 'detected', 'median' and 'range' mean in the sampling record on this page
In the public water system data, terms like 'detected' indicate that an instrument measured a substance at some level during sampling, not that it exceeds any health threshold. For example, the lead level was detected at the 90th percentile concentration of 0.0024 milligrams per liter based on plumbing samples, well below regulatory action levels. Median values represent the middle point of all samples, and range indicates the lowest to highest measured values. These statistics describe overall system performance and help identify trends, but do not diagnose individual tap water conditions.
The order in which to rule things out, from cheapest check to laboratory test
Start by reviewing any water quality reports provided annually by your municipal supplier to understand typical system conditions. Next, assess your existing treatment equipment’s maintenance and capacity to handle your daily water usage. If concerns persist, obtain a certified laboratory test of your household tap water, specifically measuring for substances relevant in your area, such as lead. This sequential approach balances cost and precision in clarifying water quality questions.
How public-system records differ from private-well testing in what they establish
Public water system records reflect treated water quality delivered throughout a community’s distribution network. These data verify compliance with health standards at the system scale but do not reveal variations inside household plumbing. Private well testing, by contrast, directly measures water from a single source and gives detailed insight into that specific supply but lacks the quality control of a public system. Understanding this distinction is critical to interpreting what municipal data can and cannot say about your tap water.
To conclusively verify your household's water safety, order a comprehensive laboratory test of your tap water focusing on contaminants of concern in Hartford County. A clear report confirming acceptable levels will settle the question and guide any further steps.
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 CTWC - UNIONVILLE SYSTEM (CT0520011), surface water supply, serving 14693 people: 2 health-based violations of 3 total; lead 90th percentile 0.0024 mg/L