Water report directory / CA
San Francisco water guide.
A varied source mix, chloramine and published mineral data.
The water profile.
SFPUC 2025 San Francisco Water System report, page 9
| What to look at | Utility information |
|---|---|
| Disinfectant row | Chloramine, reported as chlorine |
| Hardness | Average 62 ppm as CaCO₃; range 8.1–112 |
| Total dissolved solids | Average 95 ppm; range 24–197 |
| Individual minerals | The report also lists calcium, magnesium, sodium and alkalinity |
Choose the San Francisco system report.
SFPUC publishes separate reports for several systems. The values above come from its San Francisco Water System report, whose table distinguishes the average from the observed range.
The hardness and TDS ranges show why one number does not describe every sample. Keep the reporting year, system and range beside any figure used in a project.
Chloramine and minerals are separate choices.
The report identifies chloramine in the disinfectant row and gives mineral measurements in separate tables. For a filter comparison, look for the claim corresponding to the disinfectant. For taste, explore the mineral composition and your own preferences.
If you compare glasses, keep their temperature and carbonation the same. That makes the mineral-profile comparison easier to interpret.
Find your supplier.
For addresses served by San Francisco Public Utilities Commission, begin with the supplier’s published information. Confirm the supplier on your bill, especially if you live outside the city’s direct service area.
Keep the context with the figures.
The correct service-area report, its reporting year and any current notices from the utility.
Read the ranges, sampling dates and footnotes alongside the results to understand the water supplied to your area.
For a question about your tap.
A change in taste, color or odor is a reason to contact your supplier with the details. Ask about any current advisories and the right testing method for a specific concern.
For a treatment project, keep your report and any tap-water test results together so you can discuss the right system for your home.
Bring it into the project.
Keep the report with the installation information: the address, available utilities and what you want from the water experience. For Atelier, that discussion also includes the dispenser location and nearby equipment space.