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Best water for steam irons

Q: Should I use distilled water in my iron?

Check your manual. Philips suggests distilled or demineralised water (or a 50/50 mix) in hard-water areas. Rowenta and Tefal say to use tap water, mix 50/50 only if water is very hard, and never use pure distilled water.

Most irons are built for tap water. In hard-water areas, makers suggest mixing in distilled or demineralised water.

Criterion: Still water with published TDS or dry residue of 50 mg/L or less and hardness of 25 mg/L as CaCO3 or less (worked out from published calcium and magnesium), from the brand’s own verified analysis. Lowest TDS first; ties are ordered by Waterphile Score. Check your iron’s manual before using any of them on their own.

Your iron’s manual comes first. Several makers advise against pure distilled water, so these are best used to soften hard tap water in a mix.

Why it matters

Makers differ. Philips says its irons are designed for tap water but suggests distilled or demineralised water (or a 50/50 mix) where water is hard, to slow scale. Rowenta and Tefal say to use untreated tap water, mix 50/50 with distilled water only if your water is very hard, and not to use pure distilled or demineralised water, scented water or most bottled water. Hard water leaves limescale that can block steam holes and cause white flakes.

Sources (2)

Top 20 of 44 qualifying waters · per litre, as publishedCompare the top 3 →

#	Water	TDS	Calcium	Magnesium	Compare
1	NiagaraUSA	Not detectedTDS	Not detected	Not detected	Compare
2	Polar (purified water)USA	Not detectedTDS	0.1 mg/L	Not detected	Compare
3	up&up Distilled WaterUSA	Not detectedTDS	Not detected	Not detected	Compare
4	Menehune WaterUSA (Hawaii)	Not detectedTDS	Not detected	Not detected	Compare
5	Mayday Emergency Drinking WaterUSA	Not detectedTDS	Not detected	Not detected	Compare
6	Market Pantry Purified Water (Target)USA	Not detectedTDS	Not detected	Not detected	Compare
7	Boxed Water Is BetterUSA	Not detectedTDS	Not detected	Not detected	Compare
8	Good & Gather Alkaline WaterUSA	Not detectedTDS	2.2 mg/L	0.23 mg/L	Compare
9	Le BleuUSA	<10 mg/LTDS	<0.05 mg/L	<0.1 mg/L	Compare
10	Pure Life (US)USA	13–44 mg/LTDS	Not detected	1–2.4 mg/L	Compare
11	Signature SpringsUSA	14 mg/LTDS	0.55 mg/L	0.42 mg/L	Compare
12	LauretanaItaly	14.4 mg/Ldry residue 180°C	1 mg/L	0.37 mg/L	Compare
13	Himalayas Spring WaterNepal	16 mg/LTDS	1.2 mg/L	0.48 mg/L	Compare
14	Pedra AzulBrazil	17.35 mg/Ldry residue 180°C (calculated)	1.02 mg/L	0.49 mg/L	Compare
15	3 Springs WaterUSA	21 mg/LTDS	1.4 mg/L	0.99 mg/L	Compare
16	Acqua PloseItaly	22 mg/Ldry residue 180°C	2 mg/L	1.4 mg/L	Compare
17	SpareaItaly	23.8 mg/Ldry residue 180°C	3.8 mg/L	0.53 mg/L	Compare
18	Aqua BloxUSA	25 mg/LTDS	Not detected	Not detected	Compare
19	Gond WanaParaguay	25 mg/Ldry residue at 180°C	0.4 mg/L	0.24 mg/L	Compare
20	NirvanaUSA	27 mg/LTDS	8.8 mg/L	0.39 mg/L	Compare

Sources (20)

Niagara: Niagara Bottling Water Quality Report 2026, Purified Water column · checked 2026-10-25
Polar (purified water): Polar Beverages annual analysis, Purified Finished Product, Eurofins Eaton Analytical job 380-178780-1, report date 11/06/2025 · checked 2026-10-25
up&up Distilled Water: Target – Water Quality Analysis 2025 (official, 1 Gal up&up Distilled Water) · checked 2026-11-03
Menehune Water: Menehune Water quarterly report, Q1 2018, purified finished product (hosted by Consumer Reports) · checked 2026-10-26
Mayday Emergency Drinking Water: Mayday Industries 2018 Bottled Water Quality Report (hosted by Consumer Reports) · checked 2026-10-26
Market Pantry Purified Water (Target): Market Pantry (Target) water analysis report 2018, purified water (hosted by Consumer Reports) · checked 2026-10-26
Boxed Water Is Better: Boxed Water Is Better water quality report, Q4 2018 (hosted by Consumer Reports) · checked 2026-10-25
Good & Gather Alkaline Water: Target – Water Quality Analysis 2025 (official, 1 Gallon Good & Gather Alkaline Water) · checked 2026-11-03
Le Bleu: Le Bleu – Water Purity Test, EMSL Analytical, Ultra Pure, 14/12/2022 (official) · checked 2026-10-29
Pure Life (US): Pure Life 2025 Water Analysis Report (linked from purelifewater.com) · checked 2026-10-25
Signature Springs: Signature Springs lab report (NTL), sampled 17 Jan 2018 (hosted by Consumer Reports) · checked 2026-10-26
Lauretana: Università di Pavia, Dipartimento di Chimica – analysis for Lauretana S.p.A. dated 01.08.2024 (samples 26.06.2024), PDF on lauretana.com · checked 2026-10-26
Himalayas Spring Water: Himalayas Spring Water official site, 'Analysis in mg/L' (home page; same figures on the product page, which leaves pH blank; no analysis date given) · checked 2026-10-26
Pedra Azul: aguapedraazul.com.br, Nossa Água: physical-chemical characteristics and chemical composition (no analysis date given) · checked 2026-10-26
3 Springs Water: 3 Springs Water Company, spring source water lab report (NTL), sampled 4 Apr 2018 (hosted by Consumer Reports) · checked 2026-10-26
Acqua Plose: acquaplose.com – Caratteristiche (pH, dry residue) + WSU mineral water certificate Plose Naturale, January 2024 (acquaplose.com) · checked 2026-10-29
Sparea: Sparea – Gamma (official) · checked 2026-10-29
Aqua Blox: Ready America 2018 Bottled Water Quality Report, Aqua Blox & Literz, sampled 2018-04-24 (hosted by Consumer Reports) · checked 2026-10-26
Gond Wana: Gond Wana official site, 'Agua mineral natural: guía' (composition and dry residue; no analysis date given) · checked 2026-10-26
Nirvana: Nirvana – Finished Product Analysis 2018-2019 (official) · checked 2026-10-29

FAQ

Should I use distilled water in my iron?

Check your manual. Philips suggests distilled or demineralised water (or a 50/50 mix) in hard-water areas. Rowenta and Tefal say to use tap water, mix 50/50 only if water is very hard, and never use pure distilled water.

Values as published by each brand, per litre. Not medical advice.