Hanford Water Hardness & Quality Report (2026)
Water Hardness
8 grains per gallon
Source
mixed
pH Level
7.9
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
381 mg/L
Est. Daily Cost
$0.37
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Hanford, your appliances are currently losing 18% efficiency due to mineral buildup.
| Appliance | In Hanford | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.1 yrs | 8.5 yrs | -40% |
| Washing Machine | 8.5 yrs | 12 yrs | -29% |
| Water Heater | 10.1 yrs | 15 yrs | -33% |
Regional Water Comparison
How Hanford compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Hanford, California | 137 mg/L | 5.9 ppt | 🟠 Hard | mixed |
| Lemoore, California | 163.5 mg/L | 6.7 ppt | 🟠 Hard | mixed |
| Corcoran, California | 127 mg/L | 5.6 ppt | 🟠 Hard | mixed |
| Selma, California | 165.5 mg/L | 6.8 ppt | 🟠 Hard | mixed |
| Parlier, California | 159 mg/L | 6.6 ppt | 🟠 Hard | mixed |
National Benchmark
How Hanford compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Hanford | 137 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Hanford's Water Unique?
Local geology and source profile
Hanford, California, the Kings County seat in the central San Joaquin Valley — a major Central Valley agricultural hub known for its historic Chinatown (one of the oldest and best-preserved in California) and its role in the San Joaquin Valley water wars over Kings River diversions — draws its municipal water supply from the Kings River alluvial fan groundwater of the Tulare Lake Bed Sub-basin via the City of Hanford Public Works Water Division. Water hardness in Hanford measures 137 mg/L — classified as moderately hard.
Hanford's moderate hardness reflects the Kings River alluvial fan's calcareous recharge from the Sierra Nevada. The Kings River above Hanford drains: the Sierra Nevada Batholith granite and Kaweah River–Kings River metacarbonate terrain — the Kaweah Roof Pendant and the Yokohl Valley calcareous roof pendant (calcareous marble and calcareous schist lenses of the Sierra Nevada metamorphic belt, including marble bodies in the Kings Canyon National Park area that contribute dissolved calcium to the Kings River); the Hume Lake limestone and other calcareous Sierra Nevada pendant formations. The Kings River carries moderate dissolved calcium from these Sierra Nevada calcareous marble and limestone roof pendants, recharging the Kings County alluvial fan at Hanford with the moderate 137 mg/L supply.
At 137 mg/L, Hanford residents encounter moderate scale accumulation. Faucet aerators and showerheads develop deposits after several months — monthly cleaning with citric acid solution is practical maintenance. City of Hanford Public Works Water Division consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Kings River alluvial fan (Tulare Lake Bed Sub-basin) via the City of Hanford Public Works Water Division — the eastern San Joaquin Valley Kings River Quaternary alluvial fan at the Sierra Nevada foothills–valley interface of Kings County; moderately hard supply at 137 mg/L — reflecting the Kings River calcareous alluvial fan recharge from the Sierra Nevada marble and calcareous terrain.