Newark, California
Alameda County Water District 2025 Water Quality Report. ACWD serves Fremont, Newark, and Union City. Hardness as CaCO3 prints as four labeled source columns — 96 / 40 / 138 / 62 ppm. Disinfectant residual (chloramines) annual average 2.1 ppm (ND–3.4). No Measure S-style ban turned up — check the sewer agency on the bill.
- Hardness (column 1)96 ppm (77–120)
- Hardness (column 3)138 ppm (120–160)
- Chloramines2.1 ppm (ND–3.4)
Best match for Newark
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 catalytic carbon for chloramine
Catalytic carbon with a chloramine claim (NSF/ANSI 42 for chloramine). Regular chlorine carbon is the wrong box.
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
- Water utility
- Alameda County Water District
- Hardness
- Hardness (19) ppm as CaCO3, four labeled columns: 96 (77–120), 40 (9–120), 138 (120–160), 62 (59–65). Naturally-occurring minerals. Not a citywide blend. — Alameda County Water District 2025 Water Quality Report
- Disinfectant
- Disinfectant Residual (as Cl2) annual average 2.1 ppm (range of individual detections ND–3.4), MRDL 4.0. Footnote: residual is combined chlorine (chloramines). — Alameda County Water District 2025 Water Quality 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.
- 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
- 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
Newark, California drinking water on this file is Alameda County Water District, which the 2025 cover says serves Fremont, Newark, and Union City — not Newark, New Jersey. 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 as CaCO3 as four labeled columns — 96 / 40 / 138 / 62 ppm. Chloramine residual average 2.1 ppm (ND–3.4). 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 (PWS CA0110001) — Alameda 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.