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The map

Every recorded cesspool in Hawaiʻi.

82,141 of them. Zoom to your neighborhood, click a dot, and see how close it sits to the ocean and to drinking-water wells.

Find your home on the map

Enter your Hawaiʻi Island address and we’ll drop a pin on your parcel and show whether the State has a cesspool on record there. We’ll email you your results and your next steps — no obligation.

We’ll use your email to send your results and updates about your options. Unsubscribe any time. We never post your address publicly — the pin is only visible to you.

Loading 82,141 cesspools…

County gravity main

Non-county gravity main

Force main / outfall

Treatment plant

Pump station

Community cesspool (Naʻalehu, Pāhala)

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0 cesspools in view

Click a dot for details. Zoom in to see individual cesspools.

Source: Hawaiʻi Cesspool Prioritization Tool (University of Hawaiʻi Water Resources Research Center and the Department of Health). Dots mark the cesspools on the State’s record, so a property can have one that isn’t shown, and a dot can be out of date. Priority areas, well capture zones and sea-level-rise zones are the State’s.

Learn more: videos from Hawaiʻi Sea Grant

Short explainers on what a cesspool is, what it does to our communities, and how the State’s priority map was built.

What is a Cesspool?
What are the Community Impacts of Cesspools?
What is the Hawaiʻi Cesspool Prioritization Tool (HCPT)?
How Were the HCPT Priority Areas Determined?

Videos by the University of Hawaiʻi Sea Grant College Program, shared from their Cesspool Prioritization Tool page.

Have a cesspool on Hawaiʻi Island?

Check your property.

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