Water hardness in Tomaszów Mazowiecki
166 mg/L hard
Tap water in Tomaszów Mazowiecki is hard: 166 mg/L (9.7 gpg · 9.3 °dH · 16.6 °fH).
Source: ZWiK Łódź – Twardość wody (tabela dla Tomaszowa Mazowieckiego) (2025) · data checked 2026-10-29
Range across supply zones: 158–174 mg/L.
Tomaszów Mazowiecki is supplied by the local branch of ZWiK Łódź. Its 2025 table gives a range of 158 to 174 mg/L CaCO₃, and our 166 mg/L is the midpoint, so it is computed. This is hard but notably softer than most of Poland. Limescale still forms on heating elements, though more slowly than in very hard towns.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 166 mg/L |
|---|---|
| Utility | ZWiK Sp. z o.o. Łódź (Zakład Tomaszów Mazowiecki) |
How Tomaszów Mazowiecki compares
- Tap water in Tomaszów Mazowiecki is 32 % softer than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 81 of 91 in Poland (1 = hardest); 11 % of these cities have softer water.
- In łódzkie it is number 5 of 5 cities; the regional median is 208 mg/L.
- Nearest city with clearly softer water: Siemianowice Śląskie, 150 km away (113 mg/L).
- Nearest city with clearly harder water: Łódź, 45 km away (208 mg/L).
Ranking of the hardest and softest water in Poland →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Tomaszów Mazowiecki
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 9 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S1 |
| LG | H2 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Tomaszów Mazowiecki water hard or soft?
It is hard: 166 mg/L as CaCO₃ (9.7 gpg, 9.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Tomaszów Mazowiecki safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
How many grains per gallon is Tomaszów Mazowiecki water?
9.7 gpg, equal to 9.3 °dH, 16.6 °fH or 166 mg/L calcium carbonate.
What dishwasher salt setting should I use in Tomaszów Mazowiecki?
For 166 mg/L (9.3 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Tomaszów Mazowiecki?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: ZWiK Łódź – Twardość wody (tabela dla Tomaszowa Mazowieckiego) (2025). Method: computed from supplier's calcium and magnesium. ZWiK Łódź – Twardość wody (tabela dla Tomaszowa Mazowieckiego) · Outdated figure? Tell us