Understanding Hawaii Lava Zones

Lava zones are a critical factor when purchasing agricultural land on the Big Island of Hawaii. The USGS classifies areas into zones 1 through 9, with Zone 1 being the highest hazard and Zone 9 the lowest.

Zone 1 — Highest Hazard

Includes the summit and rift zones of Kilauea and Mauna Loa. Active venting and lava flows are most frequent here. Land prices are significantly lower, but insurance is extremely difficult to obtain and agricultural improvements are at high risk.

Zone 2 — High Hazard

Adjacent to Zone 1, these areas have been covered by lava flows in historical time. Many affordable agricultural parcels in Puna fall within Zone 2. Insurance options are limited but available through specialty carriers.

Zone 3 — Moderate Hazard

Areas with gradual slopes where lava flows have occurred but less frequently. Parts of Kona and Kohala fall in this zone. Insurance is more readily available, and this zone represents a good balance of price and risk for agricultural buyers.

Zones 4-9 — Lower Hazard

These zones have progressively lower risk from lava flows. Most agricultural land in Waimea, North Kohala, and Hamakua Coast falls in zones 4-8. Standard insurance is available, and land prices reflect the lower volcanic risk.

Impact on Agriculture

Volcanic soil in Hawaii is exceptionally fertile. Many of the state’s most productive coffee, macadamia nut, and tropical fruit farms operate in zones 2-4, where the rich volcanic soil creates ideal growing conditions despite the elevated hazard levels. Understanding your risk tolerance and insurance options is key to making a smart agricultural land purchase.

Other Islands

Lava zones are primarily a Big Island consideration. Maui has Haleakala (last erupted around 1790), but all other Hawaiian islands are considered volcanically dormant with no active lava zone concerns for agricultural buyers.