Turlock Water Hardness & Quality Report (2026)
Water Hardness
7.2 grains per gallon
Source
mixed
pH Level
7.8
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
334.3 mg/L
Est. Daily Cost
$0.33
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 Turlock, your appliances are currently losing 17% efficiency due to mineral buildup.
| Appliance | In Turlock | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.5 yrs | 8.5 yrs | -35% |
| Washing Machine | 9 yrs | 12 yrs | -25% |
| Water Heater | 10.6 yrs | 15 yrs | -29% |
Regional Water Comparison
How Turlock compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Turlock, California | 124 mg/L | 5.6 ppt | 🟠 Hard | mixed |
| Ceres, California | 42 mg/L | 3.2 ppt | 🟢 Soft | mixed |
| Livingston, California | 94 mg/L | 4.7 ppt | 🟡 Moderately Hard | mixed |
| Modesto, California | 177.5 mg/L | 7.1 ppt | 🟠 Hard | mixed |
| Riverbank, California | 79.5 mg/L | 4.3 ppt | 🟡 Moderately Hard | mixed |
National Benchmark
How Turlock compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Turlock | 124 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Turlock's Water Unique?
Local geology and source profile
Turlock, California, in Stanislaus County in the northern San Joaquin Valley (the largest city in Stanislaus County), draws its municipal water supply through the City of Turlock Public Works Water Division, sourcing from Turlock Irrigation District (TID) surface water deliveries (Tuolumne River–Don Pedro Reservoir origin) and local Turlock Basin groundwater wells in the Stanislaus County portion of the San Joaquin Valley alluvial plain. The TID is one of California's oldest and largest irrigation districts. Water hardness in Turlock measures 124 mg/L — classified as moderately hard.
Turlock's moderate hardness reflects the San Joaquin Valley supply blend from the Tuolumne River and local alluvial groundwater. The Tuolumne River at Don Pedro Reservoir (Tuolumne County) originates in the Sierra Nevada (Cretaceous granodiorite — very soft), but TID canal deliveries introduce concentration through the flat San Joaquin Valley delivery system. Local Turlock Basin groundwater — from deeper Quaternary and Pliocene alluvial fan deposits in Stanislaus County — shows moderately hard characteristics from calcareous cementation in the older alluvial units overlying the Corcoran Clay layer. The blend of diluted TID surface water and moderately hard local groundwater produces the 124 mg/L moderate hardness in Turlock's distribution.
At 124 mg/L, Turlock 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 Turlock Public Works and TID consistently deliver water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from the Turlock Irrigation District (TID) Tuolumne River deliveries and Turlock groundwater basin via the City of Turlock Public Works Water Division — the Tuolumne River Sierra Nevada granodiorite source and the San Joaquin Valley alluvial basin of Stanislaus County; moderately hard supply at 124 mg/L in Stanislaus County.