Honokohau, HI
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2017-2019). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Honokohau serves about 42 people through 15 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Maui County, Hawaii. EPA system ID: HI0000218; phone on file: 808-270-7834. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Honokohau's lead record
Against the period ending 2016 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Honokohau is 0 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
How Honokohau compares
Of the 112 Hawaii systems with a lead result, the median latest reading is 0 ppb; 0 are over 15 ppb right now and 1 have gone over at some point. Honokohau's reported as 0 (not detected) sits at the 4th percentile in Hawaii and the 2nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Maui County
34 other systems share Maui County; 7 of them have a higher latest lead result than Honokohau. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Wailuku | 74,511 | 0 (not detected) |
| Makawao | 29,868 | 0.88 ppb |
| Lahaina | 20,065 | 0.78 ppb |
| Kaanapali | 8,000 | 0 (not detected) |
| Upper Kula | 7,686 | 1.7 ppb |
| Kapalua | 4,200 | 0 (not detected) |
| Kaunakakai | 3,702 | 0.77 ppb |
| Lower Kula | 3,522 | 3.7 ppb |
| Lanai City | 3,200 | 0 (not detected) |
| Hoolehua | 2,400 | 0 (not detected) |
Your move
Look up your address in Honokohau's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Honokohau whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. Small systems behave differently: why small systems go over more often.