Water hardness in Isleton
0.9 gpg soft
Tap water in Isleton is soft: 0.9 gpg (16 mg/L · 0.9 °dH · 1.6 °fH).
Source: California American Water, water quality report (Isleton) (2018) · data checked 2026-10-20
This figure is over 3 years old; hardness may have changed.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 0.9 gpg |
|---|---|
| Utility | California American Water |
How Isleton compares
- Tap water in Isleton is 90 % softer than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 1346 of 1372 in the United States (1 = hardest); 2 % of these cities have softer water.
- In California it is number 329 of 336 cities; the regional median is 9.5 gpg.
- Nearest city with clearly softer water: Colfax, 118 km away (0.6 gpg).
- Nearest city with clearly harder water: Rio Vista, 9 km away (3.9 gpg).
Ranking of the hardest and softest water in the United States →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Isleton
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 1 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
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 Isleton water hard or soft?
It is soft: 16 mg/L as CaCO₃ (0.9 gpg, 0.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Isleton 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 Isleton water?
0.9 gpg, equal to 0.9 °dH, 1.6 °fH or 16 mg/L calcium carbonate.
What dishwasher salt setting should I use in Isleton?
For 16 mg/L (0.9 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Isleton?
No. With soft water a softener adds nothing.
Source
Source: California American Water, water quality report (Isleton) (2018). Method: older figure, source currently unavailable. California American Water, water quality report (Isleton) · Outdated figure? Tell us