TapMatch

Santa Ana, California

City of Santa Ana 2024 Water Quality Report. Groundwater hardness 242 ppm as CaCO3 (range 136–307). MWD imported surface water hardness 270 ppm / 16 grains (range 235–305 / 14–18). Chlorine residual 1.01 ppm. No Measure S-style residential softener ban turned up — check the sewer agency on the bill.

Cited chemistry for Santa AnaA chart of numbers printed on the utility report, each labeled with its unit. Missing numbers are left off.Hardness (groundwater)242 ppm (range 136–307)Hardness (MWD)270 ppm / 16 gpg (range 235–305)Chlorine residual1.01 ppm (range ND–2.9)TTHMs45 ppbWQR
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 (groundwater)242 ppm (range 136–307)
  2. Hardness (MWD)270 ppm / 16 gpg (range 235–305)
  3. Chlorine residual1.01 ppm (range ND–2.9)
  4. TTHMs45 ppb

Best match for Santa Ana

Salt-based water softener — confirm the district first

Check the sanitation district before installing a salt system.

Two tall mineral tanks and a black brine tank of a salt-based water softener, plumbed with copper pipe in a garage.
Salt-based softener: two mineral tanks and a brine tank.

Ask the agency on the sewer side of the bill before you cut a brine drain. California lets districts restrict self-regenerating units. A “banned in California” blog is not your district.

Shop salt-based softeners

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Other options that still fit

  • Salt-free conditioner

    A salt-free conditioner changes how scale sticks. It does not soften. Soap and spots stay closer to untreated. No brine line.

    Shop salt-free conditioners

  • Whole-house carbon for chlorine

    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

  • Under-sink reverse osmosis

    The under-sink RO we actually run is Cloud RO — NSF/ANSI 58, kitchen tap, not a whole-house tank. Check the exact listing if PFAS is why you are shopping. Shop Amazon first for under-sink RO, or buy Cloud direct. Waterdrop is a tankless option if you want that path. A certifier-listed pitcher is the cheap first step. Nobody is paying for a medical claim.

    Shop under-sink reverse osmosisBuy Cloud RO directShop Waterdrop reverse osmosisShop PFAS-listed pitchers

  • Test the tap first

    A homeowner kit is a start. It is not a state-certified lab. Use a certified lab when the decision is expensive.

    Shop water test kits

On the report

Water utility
City of Santa Ana
Hardness
Two labeled 2024 tables — not a blend. Groundwater hardness, total as CaCO3 242 ppm (range 136–307). MWD treated surface water hardness 270 ppm (range 235–305) and 16 grains/gallon (range 14–18). — City of Santa Ana 2024 Water Quality Report
Disinfectant
Distribution chlorine residual 1.01 ppm (range ND–2.9), MRDL/MRDLG 4. Narrative says local wells are chlorinated and MWD water arrives chloraminated. The printed residual row is chlorine residual. — City of Santa Ana 2024 Water Quality Report — distribution table
Brine / salt to the sewer
Check the sanitation district before installing. No City of Santa Ana residential self-regenerating softener ban like LACSD Measure S turned up. That is not a statewide ban finding. Ask the sewer agency on the 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.

Santa Ana drinking water is City of Santa Ana — local groundwater plus Metropolitan Water District imported surface water. No Measure S-style residential self-regenerating install ban turned up. Ask the agency on the sewer bill before you cut a brine drain. This is not a legal opinion.

The 2024 report prints groundwater hardness 242 ppm (136–307) and MWD hardness 270 ppm / 16 gpg (235–305 / 14–18). We do not blend those tables. Distribution chlorine residual 1.01 ppm (ND–2.9). TTHMs 45 ppb. HAA5 17 ppb. Kitchen shopping stays the Cloud RO / Waterdrop path already used on other cities if a listing is why you are looking.

Sources

  1. 2024 Water Quality Report — City of Santa Ana. Accessed 2026-09-10.

Updated September 10, 2026. A city file is chemistry we can cite plus the sewer rule. No invented detections.