Water hardness in Havre de Grace
4 gpg moderately hard
Tap water in Havre de Grace is moderately hard: 4 gpg (68 mg/L · 3.8 °dH · 6.8 °fH).
Source: City of Havre de Grace Consumer Confidence Report 2025 (MDE copy) (2025) · data checked 2026-10-29
Range across supply zones: 21–115 mg/L.
Havre de Grace's 2025 Consumer Confidence Report, as published by the Maryland Department of the Environment, gives a median hardness of 68 mg/L as CaCO3. Readings range from 21 to 115 mg/L, so the figure is computed from several values and your tap may differ. The median is in the moderate range. A home test kit will show where your own water falls.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 4 gpg |
|---|---|
| Utility | City of Havre de Grace |
How Havre de Grace compares
- Tap water in Havre de Grace is 56 % softer than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 1154 of 1372 in the United States (1 = hardest); 16 % of these cities have softer water.
- In Maryland it is number 5 of 6 cities; the regional median is 5.8 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 Havre de Grace
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 4 °dH |
| AEG / Electrolux | 2 |
| Beko | 1st |
| 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 Havre de Grace water hard or soft?
It is moderately hard: 68 mg/L as CaCO₃ (4 gpg, 3.8 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Havre de Grace 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 Havre de Grace water?
4 gpg, equal to 3.8 °dH, 6.8 °fH or 68 mg/L calcium carbonate.
What dishwasher salt setting should I use in Havre de Grace?
For 68 mg/L (3.8 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Havre de Grace?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: City of Havre de Grace Consumer Confidence Report 2025 (MDE copy) (2025). Method: computed from supplier's calcium and magnesium. City of Havre de Grace Consumer Confidence Report 2025 (MDE copy) · Outdated figure? Tell us