A water-quality report is easier to use when you know what question each part answers. It documents public-supply monitoring and regulatory information. It does not automatically describe every condition inside your home.
First, find the right provider.
Look at your water bill. Match the supplier name and public-water-system ID to the report. The SAWS main-system ID is TX0150018, but SAWS also publishes reports for other systems. A San Antonio address alone is not enough to select the correct report.
Private wells are a different situation. Their water needs address-specific evaluation rather than an assumption based on a nearby utility’s report.
A publication year is not every sample’s year.
SAWS’ 2026 main-system report uses 2025 monitoring information and includes some earlier collection dates. Check the collection date beside each parameter, and read the notes that explain sampling frequency and how averages are calculated.
A “highest detected” figure, an individual sample range, and a running annual average describe different things. Compare each figure using the report’s own explanation rather than combining them as if they were interchangeable.
Read units before comparing numbers.
Parts per million (ppm) and parts per billion (ppb) are different units. A number without its unit is not a meaningful comparison. Hardness may be described in grains per gallon; that is another measurement with its own purpose.
Report columns may include a maximum contaminant level, a health goal, or an action level. These terms have different regulatory meanings. Use the definitions supplied in the report.
An independent guideline is a different benchmark.
EWG’s Tap Water Database compares historical utility results with selected health guidelines. Those benchmarks are not the same as enforceable federal drinking-water limits. An exceedance of an EWG benchmark is not automatically a legal violation.
SAWS’ 2026 main-system report says the system had no violations in 2025. That finding and an EWG comparison can coexist because they answer different questions using different periods and thresholds.
Bring specific questions to your household conversation.
Identify your provider, the substance or household concern you want to understand, and the testing scope you need. A TDS meter does not identify each dissolved substance, and a basic in-home analysis is not a complete contaminant screen.
If you have a concern about a specific substance, ask your utility or a certified laboratory about appropriate testing. For treatment, compare the exact model’s documented reduction claims with that concern.
Explore our local water guide or talk with Paramount.
