Water hardness in Clovis
6.9 gpg moderately hard
Tap water in Clovis is moderately hard: 6.9 gpg (118 mg/L · 6.6 °dH · 11.8 °fH).
Source: City of Clovis 2025 Consumer Confidence Report (Water Delivery) (2025) · data checked 2026-10-19
Range across supply zones: 65–280 mg/L.
The City of Clovis's 2025 consumer confidence report gives a hardness of 117.7 mg/L (6.9 gpg), with a range of 65 to 280 mg/L. That range is very wide, so the figure on this page is not a typical tap. The water is moderately hard on average, but some addresses can receive much harder water.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 6.9 gpg |
|---|---|
| Utility | City of Clovis Public Utilities (Water Division) |
How Clovis compares
- Tap water in Clovis is 24 % softer than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 921 of 1372 in the United States (1 = hardest); 33 % of these cities have softer water.
- In California it is number 234 of 336 cities; the regional median is 9.5 gpg.
- Nearest city with clearly softer water: Fresno, 12 km away (5.2 gpg).
- Nearest city with clearly harder water: Sanger, 19 km away (11.1 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 Clovis
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °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 Clovis water hard or soft?
It is moderately hard: 118 mg/L as CaCO₃ (6.9 gpg, 6.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Clovis 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 Clovis water?
6.9 gpg, equal to 6.6 °dH, 11.8 °fH or 118 mg/L calcium carbonate.
What dishwasher salt setting should I use in Clovis?
For 118 mg/L (6.6 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Clovis?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: City of Clovis 2025 Consumer Confidence Report (Water Delivery) (2025). Method: figure published by the water supplier. City of Clovis 2025 Consumer Confidence Report (Water Delivery) · Outdated figure? Tell us