Maunaolu Plantation, HI
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2020-2022). 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
Maunaolu Plantation serves about 100 people through 37 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Maui County, Hawaii. EPA system ID: HI0000254; phone on file: 808-243-8600. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
The highest 90th-percentile result EPA holds for Maunaolu Plantation is 0 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2022 | 0 (not detected) |
How Maunaolu Plantation 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. Maunaolu Plantation's reported as 0 (not detected) sits at the 12th percentile in Hawaii and the 9th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
34 other systems share Maui County; 7 of them have a higher latest lead result than Maunaolu Plantation. 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) |
Next steps for Wailuku, HI
Look up your address in Maunaolu Plantation'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 Maunaolu Plantation 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. Why sampled homes are the worst-case ones is in the guide to reading the number. A zero today does not rule out a jump later - the rules are tightening in 2027.