Clovis Water Hardness & Quality Report (2026)
Water Hardness
2.1 grains per gallon
Source
mixed
pH Level
7.2
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
74.7 mg/L
Est. Daily Cost
$0.10
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 Clovis, your appliances are currently losing 5% efficiency due to mineral buildup.
| Appliance | In Clovis | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.4 yrs | 8.5 yrs | -1% |
| Washing Machine | 12.2 yrs | 12 yrs | — |
| Water Heater | 14.1 yrs | 15 yrs | -6% |
Regional Water Comparison
How Clovis compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Clovis, California | 36.5 mg/L | 3 ppt | 🟢 Soft | mixed |
| Fresno, California | 31 mg/L | 2.8 ppt | 🟢 Soft | mixed |
| Sanger, California | 72.5 mg/L | 4 ppt | 🟡 Moderately 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 Clovis compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Clovis | 36.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Clovis's Water Unique?
Local geology and source profile
Clovis, California, adjacent to Fresno in the central San Joaquin Valley of Fresno County, draws its municipal water supply through the City of Clovis Water Division, sourcing primarily from Sierra Nevada surface water delivered via the Kings River Conservation District (KRCD) and Fresno Irrigation District canal system — carrying water from Pine Flat Reservoir on the Kings River (a major Sierra Nevada river) in Fresno County, supplemented by local Fresno–Kings County groundwater basin wells beneath the valley floor. Water hardness in Clovis measures 36.5 mg/L — classified as very soft, one of the softest supplies in California's Central Valley.
Clovis' exceptional softness reflects the domination of Kings River Sierra Nevada source water in the Clovis supply. The Kings River originates deep in the Sierra Nevada mountains — draining the Kings Canyon metamorphic complex (Precambrian marble, amphibolite, and schist), Cretaceous Kings River granodiorite batholith, and high-elevation glaciated terrain in Fresno and Tulare Counties. These ancient crystalline rocks, deeply buried and transformed by high-grade metamorphism, are essentially free of soluble calcium carbonate. The Kings River at Pine Flat carries inherently very soft snowmelt, and this soft surface water dominates the Clovis supply at the eastern San Joaquin Valley margin where the canal delivery infrastructure draws directly from the Sierra Nevada slope.
With hardness at 36.5 mg/L, Clovis residents enjoy exceptionally soft water. Soap and shampoo lather with very little product. Faucet aerators and showerheads essentially never develop calcium deposits. Dishwashers produce spotless glassware. Hot water systems remain scale-free throughout their service life. City of Clovis Water Division consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from the Kings River and San Joaquin River watershed via the City of Clovis Water Division and Fresno Irrigation District canal water deliveries and local Kings River Conservation District surface water — the Sierra Nevada granite snowmelt dominates; the Kings River's origin in the Kings Canyon Precambrian metamorphic and granodiorite terrain produces extremely soft supply at 36.5 mg/L in Fresno County's east valley zone.