If Your Lab Test Report Lists Contaminant Levels with a Range and Median Values
Water quality laboratory reports for individual homes show specific concentrations of various constituents measured at your tap or in your plumbing. These results include minimum, maximum, and median values found in samples. However, such personal results differ from government data collected on a regional water supply system. In Arkansas County, the groundwater-based public water system GRAND PRAIRIE REGIONAL WATER (PWSID AR0000738) provides benchmark sampling throughout its service area, but this data does not directly represent your household’s specific water conditions.
If You Are Comparing This Area’s Water Record with Neighboring Regions
The Arkansas County water system has recorded six EPA health-based violations as of the latest report. This indicates regulatory findings at the system level, not individual household risk or water safety. When comparing with nearby counties, differences in the number or type of violations may reflect local groundwater conditions, the age and size of water infrastructure, and treatment methods coded under the system’s records. Yet, such comparisons do not establish your home’s water quality. They only provide context for regional water management and treatment performance.
If You Consider The Effect of Well Depth and Source Type on Water Quality Expectations
The water system’s supply is groundwater, which varies with aquifer depth and composition. Public system sampling captures a composite of water drawn from many wells to meet community needs. Deeper wells may have different mineral content or trace constituents compared to shallower ones. Your own well or connection point may produce water with characteristics distinct from the system’s aggregated data, reinforcing the importance of direct testing to identify your household’s specific water qualities and treatment requirements.
If You Want a Practical Example of Reviewing the Median and Range as a Homeowner
Consider that the lead 90th percentile level in the system’s recent sampling was 0.001 mg/L, a measurement taken from tap water reflecting plumbing influences, not raw source water. This low percentile value suggests that most samples fall below this level, but without indicating a violation or imminent health risk. Your home’s individual lead level could be higher or lower; only a certified laboratory analysis of your tap water can clarify this. Understanding these values aids in determining if your existing equipment's capacity to maintain safe drinking water meets current demands.
If You Are Deciding What Checks to Make Before Considering New Equipment
Begin by ensuring your household plumbing is free from sources of water quality disruption such as old pipes or cross connections. Next, compare any recent certified laboratory tests you have against local public system data to identify discrepancies. If the quality challenges persist and your current treatment equipment can no longer keep pace, independent testing reveals which specific constituents may require additional filtration or conditioning. This approach prioritizes cost-effective actions before engaging more complex solutions.
It is important not to assume that regional water system data alone defines your household’s water safety or treatment needs. Individual testing remains necessary to understand and address your home’s unique water quality profile. When your existing equipment cannot maintain safe drinking water as conditions evolve or demands increase, the C-Series Safe Drinking Water Filter ships ready to configure and can provide comprehensive filtration tailored to your household’s situation.
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 GRAND PRAIRIE REGIONAL WATER (AR0000738), groundwater supply, serving 15204 people: 6 health-based violations of 8 total; lead 90th percentile 0.001 mg/L