When you receive a certified laboratory test report for your home's drinking water, it often includes numbers representing concentrations of various substances. However, these values pertain only to the specific sample tested, typically from a tap or well, and can differ widely from the public water system records that cover many users over a large area.
Reading Median and Range Values in Pinal County's Public Water System Records
Public water system records, such as those from GW SANTA CRUZ WATER CO serving Maricopa in Pinal County, compile data from many samples taken throughout their service area. For example, the EPA SDWIS public water system record reports a 90th percentile lead concentration of 0 mg/L as of December 31, 2024, reflecting distribution and plumbing conditions rather than the groundwater source itself.
This high-level summary indicates that most samples showed no detectable lead in plumbing, but it does not guarantee that any single tap has identical results. Understanding the median and range in such records helps homeowners gauge the typical water quality available in the community but is not a substitute for individual water testing.
Distinguishing Whole-Home Drinking Water Issues from Plumbing and Distribution Variations
Confusion often arises between water issues related to source water quality and those caused by plumbing systems or distribution network materials and age. The public water system's record includes reports of one health-based violation out of 94 tested parameters, underscoring that most measures meet regulatory standards.
This emphasizes that concerns about taste, staining, or corrosivity typically align more with secondary aesthetic standards rather than health-based limits. Homeowners should consider these distinctions when evaluating their water quality problems.
Comparing Pinal County's Water System Records with Neighboring Regions Without Overinterpretation
While nearby counties may show differing water quality data due to geological or treatment differences, the public system record for Maricopa area consumers informs what is generally expected from GW SANTA CRUZ WATER CO’s groundwater supply and treatment processes.
However, a direct comparison should be cautious. Differences in sampling size, timing, or treatment approaches can influence records significantly. Simply put, one should not assume that the data in one county automatically applies elsewhere or to their specific home supply.
How Certified Laboratory Testing Reports for Drinking Water Ingredients Are Structured
Certified laboratory tests present results as concentrations in mg/L or other units, with details on sampling date and methods. For constituents like lead, they often report percentiles to indicate distribution across multiple samples.
Understanding these reports involves recognizing that detection is not a violation and that below-threshold values do not indicate a problem. Homeowners interested in precise data for their household should obtain certified testing specifically for their water source and plumbing setup.
Effects of Sample Depth, Well Depth, and Source Type on Expected Water Quality
Water quality can vary by sample depth, well construction, and the type of aquifer from which groundwater is drawn. Deeper wells may encounter different mineral content or treatment needs versus shallow ones.
Public system records aggregate these variations across multiple wells and sampling points, but individual residences may observe differences depending on their specific water source.
Additional Considerations for Commercial and Industrial Water Users
Commercial and industrial operations often require compliance with stricter or more specific water quality criteria than residential users. Their questions may include system capacity, large volume flow rates, and contaminant limits tied to operational processes.
Households typically focus on drinking water quality within regulatory safety standards and aesthetic preferences.
For homeowners in Maricopa, Pinal County who measure their household daily water demand and seek a reliable solution accommodating a home size appropriate to the 32,000 grain capacity, the Pentair Whole-Home + Drinking Combo System ships ready to configure for effective treatment. This approach addresses water quality concerns informed by the regional public water system data and household usage patterns.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2024-12-31. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA SDWIS record for GW SANTA CRUZ WATER CO (AZ0411131), groundwater supply, serving 84000 people: 1 health-based violations of 94 total; lead 90th percentile 0 mg/L
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