Water hardness in Webb City
10 gpg hard
Tap water in Webb City is hard: 10 gpg (172 mg/L · 9.6 °dH · 17.2 °fH).
Source: Webb City PWS 2025 Annual Water Quality Report (MoDNR) (2025) · data checked 2026-10-29
Range across supply zones: 140–204 mg/L.
Webb City runs its own public water system, reported to the Missouri Department of Natural Resources. The 2025 annual report gives a computed median of 172 mg/L as CaCO₃, with a range of 140 to 204 mg/L. The top of that range is above 180 mg/L, the USGS threshold for very hard water.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 10 gpg |
|---|---|
| calcium_mgl | 46.9 |
| magnesium_mgl | 21.2 |
| Utility | City of Webb City |
How Webb City compares
- Tap water in Webb City is 11 % harder than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 622 of 1372 in the United States (1 = hardest); 55 % of these cities have softer water.
- In Missouri it is number 19 of 32 cities; the regional median is 10.3 gpg.
Ranking of the hardest and softest water in the United States →
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 Webb City
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 10 °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 Webb City water hard or soft?
It is hard: 172 mg/L as CaCO₃ (10 gpg, 9.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Webb City safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
How many grains per gallon is Webb City water?
10 gpg, equal to 9.6 °dH, 17.2 °fH or 172 mg/L calcium carbonate.
What dishwasher salt setting should I use in Webb City?
For 172 mg/L (9.6 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Webb City?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: Webb City PWS 2025 Annual Water Quality Report (MoDNR) (2025). Method: computed from supplier's calcium and magnesium. Webb City PWS 2025 Annual Water Quality Report (MoDNR) · Outdated figure? Tell us