Airport Water Hardness & Quality Report (2026)
Water Hardness
3.7 grains per gallon
Source
groundwater
pH Level
7.6
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
195.1 mg/L
Est. Daily Cost
$0.17
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 Airport, your appliances are currently losing 8% efficiency due to mineral buildup.
| Appliance | In Airport | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.5 yrs | 8.5 yrs | -12% |
| Washing Machine | 11.3 yrs | 12 yrs | -6% |
| Water Heater | 13.1 yrs | 15 yrs | -13% |
Regional Water Comparison
How Airport compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Airport, Hawaii | 63 mg/L | 1.3 ppt | 🟡 Moderately Hard | groundwater |
| Joint Base Pearl Harbor Hickam, Hawaii | 20 mg/L | 0.7 ppt | 🟢 Soft | groundwater |
| Aliamanu / Salt Lakes / Foster Village, Hawaii | 35 mg/L | 0.9 ppt | 🟢 Soft | groundwater |
| Halawa, Hawaii | 44.5 mg/L | 1 ppt | 🟢 Soft | groundwater |
| Halawa Heights, Hawaii | 45 mg/L | 1 ppt | 🟢 Soft | groundwater |
National Benchmark
How Airport compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Airport | 63 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Airport's Water Unique?
Local geology and source profile
Airport (Kalihi–Palama area), Honolulu, Hawaii — a major central Honolulu urban community near the Honolulu International Airport (The Airport neighborhood area in central Honolulu — the communities surrounding the Daniel K. Inouye International Airport (formerly Honolulu International Airport, one of the busiest airports in the Pacific) — includes the Kalihi–Palama, Salt Lake, and airport-adjacent communities; the Salt Lake community in Honolulu near the airport is one of the most densely populated urban neighborhoods in Honolulu, with a significant Pacific Islander (particularly Micronesian — Marshallese, Chuukese, and Palauan) and Filipino-American population), a diverse Honolulu County community with a significant Filipino-American, Marshallese, Native Hawaiian, and working-class population (the airport corridor communities are among the most economically challenged in Honolulu), adjacent to Pearl Harbor and Ewa in the central Oahu corridor, and a community shaped by its position at the heart of Honolulu's transportation infrastructure — draws its municipal water supply via the Honolulu BWS. Water hardness in the Airport area measures 63 mg/L — classified as moderately soft.
The Airport area's moderate softness reflects the central Oahu Koolau–Waianae basalt aquifer's calcareous-poor volcanic character. The Oahu basal lens aquifer provides water from the Quaternary Oahu Shield Volcano Basalt (calcareous-poor). Honolulu BWS produces the moderately soft 63 mg/L for the central Oahu zone.
With hardness at 63 mg/L, Airport area residents enjoy moderately soft water. Honolulu BWS consistently delivers water meeting all Hawaii DOH and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Oahu basal lens aquifer (Koolau and Waianae Range) via the Honolulu Board of Water Supply (BWS) — the Honolulu County central Oahu Airport–Honolulu corridor (Quaternary calcareous-poor Oahu shield basalt — the calcareous-poor central Oahu shield volcano basalt aquifer; Honolulu BWS central Oahu distribution); moderately soft supply at 63 mg/L in Honolulu County.