San Gabriel, California

San Gabriel County Water District 2025 Consumer Confidence Report. Hardness 97.4 ppm (range 17–200) on the labeled 2025 row. The row is not labeled as CaCO3 in the extracted text, so this file does not assign a hardness class from it. This file is the San Gabriel County WD booklet, not every address in the city. Chlorine 1.01 ppm average (range 0.65–1.52) on the labeled 2025 columns, MRDL 4.0 as Cl2. No Measure S-style ban turned up — check the sewer agency on the bill.

Cited chemistry for San GabrielA chart of numbers printed on the utility report, each labeled with its unit. Missing numbers are left off.Hardness (printed row)97.4 ppm (17–200)Chlorine residual1.01 ppm (0.65–1.52)WQR
Cited numbers from the utility report. Length follows the printed value against a labeled scale — not a health ranking. If the report has no number, it is not on the chart.
  1. Hardness (printed row)97.4 ppm (17–200)
  2. Chlorine residual1.01 ppm (0.65–1.52)

Best match for San Gabriel

Whole-house carbon for chlorine

A single black whole-house carbon tank with a control head, installed in a garage and connected to copper pipe.
Whole-house carbon tank. No brine tank.

That is chlorine. A whole-house carbon filter with an NSF/ANSI 42 chlorine claim is the usual match. A softener will not take chlorine out.

Shop whole-house carbon

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Other options that still fit

On the report

Water utility
San Gabriel County Water District
Hardness
Hardness 97.4 ppm (range 17–200) on the labeled 2025 row. The row is not labeled as CaCO3 in the extracted text, so this file does not assign a hardness class from it. — San Gabriel County Water District 2025 Consumer Confidence Report
Disinfectant
Chlorine 1.01 ppm average (range 0.65–1.52) on the labeled 2025 columns, MRDL 4.0 as Cl2. — San Gabriel County Water District 2025 Consumer Confidence Report
Brine / salt to the sewer
Check the sanitation district before installing. No city or sanitation-district residential self-regenerating softener ban like LACSD Measure S or IEUA Ordinance § 2.6 turned up on the pages we opened. That is not a statewide ban finding. Ask the agency on the sewer bill before you cut a brine drain.

Also around here

Extra context besides the utility report and the chart above — geology, an unregulated table, or a published study. Not a second set of printed tap numbers.

San Gabriel drinking water on this file is San Gabriel County Water District, PWS CA1910144. No city or sanitation-district residential self-regenerating softener ban like LACSD Measure S or IEUA Ordinance § 2.6 turned up on the pages we opened. That is not a statewide ban finding. Ask the agency on the sewer bill before you cut a brine drain. This is not a legal opinion.

The 2025 report prints Hardness 97.4 ppm (range 17–200) on the labeled 2025 row. The row is not labeled as CaCO3 in the extracted text, so this file does not assign a hardness class from it. Chlorine 1.01 ppm average (range 0.65–1.52) on the labeled 2025 columns, MRDL 4.0 as Cl2. Kitchen shopping stays the Cloud RO / Waterdrop path already used on other cities if a listing is why you are looking.

Sources

  1. 2025 Consumer Confidence Report (PWS CA1910144) — San Gabriel County Water District / State Water Resources Control Board. Accessed 2026-09-11.

Updated September 11, 2026. A city file is chemistry we can cite plus the sewer rule. No invented detections.