Lancaster, California
California Water Service Antelope Valley / Lancaster 2025 Water Quality Report. This Cal Water system is about 1,400 connections (Fremont Valley, Grand Oaks, Lancaster, Lake Hughes, Leona Valley) — not the entire city of Lancaster. Hardness prints as two columns — groundwater 101 ppm and AVEK 95 ppm. Free chlorine 0.89 ppm. No Measure S-style ban turned up — check the sewer agency on the bill.
- Hardness (groundwater)101 ppm (range 61–140)
- Hardness (AVEK)95 ppm
- Free chlorine0.89 ppm (range 0.49–1.3)
- Chromium-6 (groundwater)8.7 ppb (range 6.1–11)
Best match for Lancaster
Salt-based water softener — confirm the district first
Check the sanitation district before installing a salt system.
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.
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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.
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.
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.
On the report
- Hardness
- Two columns, 2023–2025. Groundwater 101 ppm average (range 61–140). AVEK 95 ppm (single value). Do not blend. This is the Cal Water Antelope Valley / Lancaster system, not a citywide Waterworks blend. — California Water Service 2025 Water Quality Report — Antelope Valley / Lancaster
- Disinfectant
- Free chlorine 0.89 ppm average (range 0.49–1.3), MRDL 4, 2025. Printed as free chlorine. — California Water Service 2025 Water Quality Report — Antelope Valley / Lancaster
- Brine / salt to the sewer
- Check the sanitation district before installing. Opened Lancaster Municode plumbing-code adoption. No self-regenerating ban. Most of the city may be on Los Angeles County Waterworks / Districts 14–20 sewer — ask the agency on the bill. Not LACSD Measure S.
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.
- MicroplasticsWHO’s 2019 review examined studies that found microplastic particles in treated tap and bottled water in many places. That is a published-occurrence finding, not a number from this city’s water-quality report, and we do not invent a particles-per-liter count for the tap.Microplastics in drinking-water — World Health Organization
- Chromium-6The 2025 Cal Water report prints hexavalent chromium on the groundwater column 8.7 ppb (range 6.1–11) and AVEK 0.079. Those are labeled columns for this Cal Water system, not a citywide Waterworks average.Groundwater 8.7 ppb (range 6.1–11); AVEK 0.079.2025 Water Quality Report — Antelope Valley / Lancaster — California Water Service
- PFASEPA’s Fifth Unregulated Contaminant Monitoring Rule required community systems this size to test 29 PFAS and lithium in 2023–2025. Open the UCMR 5 Data Finder for this PWS. This file does not invent a detection.Fifth Unregulated Contaminant Monitoring Rule — U.S. Environmental Protection Agency
This file is California Water Service’s Antelope Valley / Lancaster system (~1,400 connections), not Los Angeles County Waterworks District 40 for the whole city. 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 2025 report prints hardness as two columns — groundwater 101 ppm (range 61–140) and AVEK 95 ppm. Free chlorine 0.89 ppm. Kitchen shopping stays the Cloud RO / Waterdrop path already used on other cities if a listing is why you are looking.
Sources
- 2025 Water Quality Report — Antelope Valley / Lancaster — California Water Service. Accessed 2026-09-09.
Updated September 9, 2026. A city file is chemistry we can cite plus the sewer rule. No invented detections.