Water hardness in Bowie
6.5 gpg moderately hard
Tap water in Bowie is moderately hard: 6.5 gpg (112 mg/L · 6.3 °dH · 11.2 °fH).
Source: WSSC Water 2025 Tap Water Analysis Report (2025) · data checked 2026-10-20
Range across supply zones: 58–213 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| gpg | mg/L | ||
|---|---|---|---|
| Patuxent Water Filtration Plant (WSSC) | 4.1 | 70 | moderately hard |
| Potomac Water Filtration Plant (WSSC) | 9 | 154 | hard |
WSSC Water's 2025 tap water analysis lists two plants with different hardness: Patuxent averaged 70 mg/L (4.1 gpg, range 58-86) and Potomac averaged 154 mg/L (9.0 gpg, range 79-213). WSSC does not say which plant serves Bowie, so the published figure is a midpoint of the two and your tap may be softer or harder. The City of Bowie also runs its own water plant for part of town, which this data does not cover.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 6.5 gpg |
|---|---|
| Utility | WSSC Water (Washington Suburban Sanitary Commission) |
How Bowie compares
- Tap water in Bowie is 28 % softer than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 947 of 1372 in the United States (1 = hardest); 31 % of these cities have softer water.
- In Maryland it is number 2 of 6 cities; the regional median is 5.8 gpg.
- Nearest city with clearly softer water: Montross, 95 km away (2.9 gpg).
- Nearest city with clearly harder water: Alexandria, 34 km away (11.2 gpg).
Ranking of the hardest and softest water in the United States →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Bowie
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 6 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Bowie water hard or soft?
It is moderately hard: 112 mg/L as CaCO₃ (6.5 gpg, 6.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Bowie 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 Bowie water?
6.5 gpg, equal to 6.3 °dH, 11.2 °fH or 112 mg/L calcium carbonate.
What dishwasher salt setting should I use in Bowie?
For 112 mg/L (6.3 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Bowie?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: WSSC Water 2025 Tap Water Analysis Report (2025). Method: figure published by the water supplier. WSSC Water 2025 Tap Water Analysis Report · Outdated figure? Tell us