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Is Ko Olina, HI tap water safe?

2 utilities serve Ko Olina, 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 Ko Olina has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s records.

Waipahu - Ewa - Waianae, which serves the most people here, has nothing above a health goal in EPA’s records. That data covers what its report lists, not everything.

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 Ko Olina’s ZIP codes, from EPA’s estimates.

Water testing near Ko Olina

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.

The 2 labs Hawaii certifies closest to Ko Olina, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • FQLabs - Honolulu

    Honolulu, HI · about 13 miles

    Certified for bacteria

    (808) 839-9444

  • AECOS, Inc. - Kaneohe

    Kaneohe, HI · about 18 miles

    Certified for bacteria

    (808) 234-7770

All 12 certified labs for Hawaii

ZIP codes in Ko Olina

Which ZIP codes are in Ko Olina: 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. Certified labs: Hawaii Department of Health, State Laboratories Division, certified chemistry, radiochemistry and microbiology drinking water laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Ko Olina

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

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