Calistoga, California
City of Calistoga 2025 Consumer Confidence Report. Hardness 65 mg/L on the labeled 2025 sodium-and-hardness table (sample date 4/8/2025). Typical-source note: magnesium and calcium. The row is not labeled as CaCO3, so this file does not assign a hardness class from it. Chlorine 1.4 mg/L (range 0.7–2.0 mg/L), MRDL 4 as Cl2, on the 2025 table. Narrative says chlorine is used to protect water in the distribution system. Opened City of Calistoga booklet. Confirm the bill — this file is that PWS, not every address in Calistoga. No Measure S-style ban turned up — check the sewer agency on the bill.
- Chlorine residual1.4 mg/L (0.7–2.0)
Best match for Calistoga
Whole-house carbon for chlorine
Check the sanitation district before installing a salt system.
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.
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Other options that still fit
Confirm hardness on the current CCR before buying
Open the current CCR for grains. This file does not invent a number from a ranking site. A salt softener needs a drain if it is legal at the address.
Shop salt-based softenersShop salt-free conditionersShop water test kits
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
- City of Calistoga
- Hardness
- Hardness 65 mg/L on the labeled 2025 sodium-and-hardness table (sample date 4/8/2025). Typical-source note: magnesium and calcium. The row is not labeled as CaCO3, so this file does not assign a hardness class from it. — City of Calistoga 2025 Consumer Confidence Report
- Disinfectant
- Chlorine 1.4 mg/L (range 0.7–2.0 mg/L), MRDL 4 as Cl2, on the 2025 table. Narrative says chlorine is used to protect water in the distribution system. — City of Calistoga 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.
- 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
Calistoga drinking water on this file is City of Calistoga, PWS CA2810002. 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 65 mg/L on the labeled 2025 sodium-and-hardness table (sample date 4/8/2025). Typical-source note: magnesium and calcium. The row is not labeled as CaCO3, so this file does not assign a hardness class from it. Chlorine 1.4 mg/L (range 0.7–2.0 mg/L), MRDL 4 as Cl2, on the 2025 table. Narrative says chlorine is used to protect water in the distribution system. Kitchen shopping stays the Cloud RO / Waterdrop path already used on other cities if a listing is why you are looking.
Sources
- 2025 Consumer Confidence Report (PWS CA2810002) — City of Calistoga / 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.