Water hardness in Melissa
9 gpg hard
Tap water in Melissa is hard: 9 gpg (154 mg/L · 8.6 °dH · 15.3 °fH).
Source: City of Melissa 2024 CCR (NTMWD Wylie Water Treatment Plants data) (2024) · data checked 2026-11-02
Range across supply zones: 105–202 mg/L.
Melissa takes water from the NTMWD Wylie plant. The 2024 report gives a computed hardness of 153.5 mg/L as CaCO3, with a range of 105 to 202 mg/L, the same figures as Royse City. Hard water here means regular descaling of kettles and showerheads.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 9 gpg |
|---|---|
| Utility | City of Melissa (water from NTMWD Wylie plant) |
How Melissa compares
- Tap water in Melissa is close to the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 697 of 1372 in the United States (1 = hardest); 49 % of these cities have softer water.
- In Texas it is number 26 of 60 cities; the regional median is 8.6 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 Melissa
| 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 Melissa water hard or soft?
It is hard: 154 mg/L as CaCO₃ (9 gpg, 8.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Melissa 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 Melissa water?
9 gpg, equal to 8.6 °dH, 15.3 °fH or 154 mg/L calcium carbonate.
What dishwasher salt setting should I use in Melissa?
For 154 mg/L (8.6 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Melissa?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: City of Melissa 2024 CCR (NTMWD Wylie Water Treatment Plants data) (2024). Method: computed from supplier's calcium and magnesium. City of Melissa 2024 CCR (NTMWD Wylie Water Treatment Plants data) · Outdated figure? Tell us