The public water system record for JOHNSTOWN TOWN OF (CO0162418) in Weld County, Colorado, provides a snapshot of water quality serving over 27,000 people through nearly 7,700 connections. This record, drawn from government sampling, indicates there are two EPA health-based violations of a total 43 evaluated, offering a precise perspective on the system's compliance and water quality concerns as measured under federal oversight.
Public Water System Records Are Not the Same as Private Well Testing
Many households in Weld County consider private well water testing to understand their drinking water. However, public water system records reflect average or representative conditions across a broad community and do not measure individual household water quality. These records are collected at system points and distribution samples, and do not capture the variations found in a single home’s plumbing or well. Therefore, while these samples identify trends or compliance issues at the system level, they cannot determine the exact water quality within your residence.
Interpreting Median and Range Values in Public Water Sampling
The record notes specific figures like the Lead 90th percentile concentration of 0.001 mg/L, which refers to the distribution of lead levels found in sampled residential plumbing and not the source water itself. This median value shows a low presence of lead throughout the system but remember that individual homes can vary. Additionally, treatment process codes listed in the record relate to various technologies applied system-wide. Reading these figures helps homeowners assess potential water characteristics but does not replace the need for individual water testing within the home.
How Water Source and Sampling Depth Affect Expected Water Quality
This community water system relies on surface water sources, which generally differ in quality from groundwater or well water. Surface water tends to have variable characteristics influenced by environmental factors such as weather, runoff, and seasonal changes. Sampling methods and depth also influence results—surface water sampling targets source water characteristics before treatment, whereas distribution samples indicate post-treatment water as it reaches consumers. Understanding these distinctions can help homeowners anticipate what contaminants or conditions may be present at home versus what the system monitoring reveals.
Which Water Fixtures and Appliances Are Impacted First?
Water quality measured in public records primarily affects all household water but is most noticeable at points of direct consumption such as drinking taps, ice makers, and refrigerators. Appliances like coffee makers or water dispensers may also be affected, given they use treated tap water. Plumbing fixtures and water-using devices can be sensitive to the water’s mineral content and residual treatment chemicals, which can impact taste or appliance longevity. Knowing the system’s treatment processes can guide homeowners in choosing supplemental treatment suited for drinking water quality improvements.
Sample Size and Variation Behind the Official Water Quality Figures
The record summarizes data collected from a substantial population served and numerous sampling points, providing a reliable overview of the water system’s condition. However, the total number of samples and the diversity of well or source sites influence the precision of the data. A small sample size or limited source diversity might mask localized issues. The two recorded health-based violations indicate areas for attention but do not represent the persistent condition everywhere in the system. Homeowners should consider individual water testing to clarify their specific household situation.
For residents deciding on the appropriate water treatment level, the Fleck Whole-Home + Drinking Combo System addresses the needs indicated by a 32,000-grain capacity demand, supporting treatment for whole-house water quality and drinking water concerns. This system ships ready to configure to enhance your household water based on measured conditions and your water use.
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 JOHNSTOWN TOWN OF (CO0162418), surface water supply, serving 27295 people: 2 health-based violations of 43 total; lead 90th percentile 0.001 mg/L
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