Hilliard Water Hardness & Quality Report (2026)
Water Hardness
6.5 grains per gallon
Source
river
pH Level
7.6
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
177.1 mg/L
Est. Daily Cost
$0.30
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 Hilliard, your appliances are currently losing 15% efficiency due to mineral buildup.
| Appliance | In Hilliard | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.9 yrs | 8.5 yrs | -31% |
| Washing Machine | 9.5 yrs | 12 yrs | -21% |
| Water Heater | 11.1 yrs | 15 yrs | -26% |
Regional Water Comparison
How Hilliard compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Hilliard, Ohio | 111.5 mg/L | 4.3 ppt | 🟡 Moderately Hard | river |
| Dublin, Ohio | 105.5 mg/L | 4 ppt | 🟡 Moderately Hard | river |
| Upper Arlington, Ohio | 209.5 mg/L | 8.2 ppt | 🔴 Very Hard | river |
| Powell, Ohio | 237 mg/L | 9.3 ppt | 🔴 Very Hard | river |
| Worthington, Ohio | 220 mg/L | 8.6 ppt | 🔴 Very Hard | river |
National Benchmark
How Hilliard compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Hilliard | 111.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Hilliard's Water Unique?
Local geology and source profile
Hilliard, Ohio, in Franklin County — a major northwest Columbus suburban community (Hilliard is one of Franklin County's most significant northwest suburban communities in the Columbus metro — a rapidly growing primarily residential community in the Dublin–Hilliard northwest Columbus corridor), home of one of the highly rated Columbus metro school districts (Hilliard City Schools are consistently rated among the top suburban Columbus school districts for academic performance), a diverse Franklin County community with a significant South Asian-American and Chinese-American technology and medical professional population, and a community in the rapidly developing US-33 northwest Columbus growth corridor — draws its municipal water supply via the City of Columbus Division of Water. Water hardness in Hilliard measures 111.5 mg/L — classified as moderately hard.
Hilliard's moderate hardness reflects the Columbus Division of Water's northwest Franklin County distribution characteristics. The Columbus water system (Scioto River — Silurian Niagaran Dolomite, Delaware Limestone watershed) distributes to the northwest Franklin County Hilliard zone (primarily 1980s–2000s suburban development mains in the newer Hilliard suburban expansion), producing the moderate 111.5 mg/L — softer than nearby Upper Arlington (209.5 mg/L) due to newer distribution infrastructure.
At 111.5 mg/L, Hilliard residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. Columbus Division of Water consistently delivers water meeting all Ohio EPA and federal EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Scioto River (Columbus water system) via the City of Columbus Division of Water — the Franklin County northwest Columbus suburban corridor (Devonian–Silurian calcareous Ohio Shale and Niagaran Dolomite — the central Ohio Paleozoic carbonate platform; Columbus Division of Water northwest distribution to Hilliard Franklin County zone); moderately hard supply at 111.5 mg/L in Franklin County.