Water hardness in Shafter
7.7 gpg hard
Tap water in Shafter is hard: 7.7 gpg (132 mg/L · 7.4 °dH · 13.2 °fH).
Source: California SWRCB Division of Drinking Water, EDT lab results, system CA1510019 (2026-01) · data checked 2026-10-19
Range across supply zones: 44–207 mg/L.
The Shafter figure comes from State Water Resources Control Board lab results for the City of Shafter system. The median of 12 results from 2021 to 2026, taken at 6 well points, is 132.2 mg/L as CaCO3 (7.7 gpg), with a range of 43.9 to 206.8 mg/L. That is hard on median, and wells differ widely. Ask the city which supply reaches your address.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 7.7 gpg |
|---|---|
| Utility | Shafter, City Of |
How Shafter compares
- Tap water in Shafter is 15 % softer than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 818 of 1372 in the United States (1 = hardest); 40 % of these cities have softer water.
- In California it is number 214 of 336 cities; the regional median is 9.5 gpg.
- Nearest city with clearly softer water: McFarland, 21 km away (0.8 gpg).
- Nearest city with clearly harder water: Tehachapi, 78 km away (9.9 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 Shafter
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| 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 Shafter water hard or soft?
It is hard: 132 mg/L as CaCO₃ (7.7 gpg, 7.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Shafter 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 Shafter water?
7.7 gpg, equal to 7.4 °dH, 13.2 °fH or 132 mg/L calcium carbonate.
What dishwasher salt setting should I use in Shafter?
For 132 mg/L (7.4 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Shafter?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: California SWRCB Division of Drinking Water, EDT lab results, system CA1510019 (2026-01). Method: own measurement. California SWRCB Division of Drinking Water, EDT lab results, system CA1510019 · Outdated figure? Tell us