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Is Kailua, HI tap water safe?

2 utilities serve Kailua, by EPA’s records. Here is what EPA’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

Neither of the 2 utilities serving Kailua has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s records.

Hnl - Windward - Pearl Harbor, which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 0.092 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Kailua’s ZIP codes, from EPA’s estimates.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in Hnl - Windward - Pearl Harbor’s water, which serves the most people here. Another utility’s report names what handles its own results.

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Every claim, and more filters, in the full report

Water testing near Kailua

A utility tests the water it sends out. A test of your own tap shows what your pipes add, and on a private well it is the only test there is. It takes a lab Hawaii certifies.

No lab Hawaii certifies is within 75 miles of Kailua on the state’s list. Some take samples by mail; the state’s page lists them all.

All 12 certified labs for Hawaii

ZIP codes in Kailua

Which ZIP codes are in Kailua: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology.

Near Kailua

Other towns in Hawaii County with a page of their own.

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