Waikoloa, HI
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2019-2021). 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.
Waikoloa at a glance
Waikoloa serves about 12,100 people through 2,120 service connections, which makes it a large system under EPA's size classes. It is privately owned and draws groundwater, in Hawaii County, Hawaii. EPA system ID: HI0000135; phone on file: 808-883-2065. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2018 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Waikoloa is 0 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2021 | 0 (not detected) |
| 2018 | 0 (not detected) |
Against other Hawaii systems
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. Waikoloa's reported as 0 (not detected) sits at the 80th percentile in Hawaii and the 37th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
36 other systems share Hawaii County; 2 of them have a higher latest lead result than Waikoloa. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Hilo | 39,477 | 0 (not detected) |
| North Kona | 29,581 | 0 (not detected) |
| South Kohala | 9,612 | 0 (not detected) |
| South Kona | 6,512 | 0 (not detected) |
| Olaa-Mountain View | 6,467 | 0 (not detected) |
| North Kohala | 4,933 | 0 (not detected) |
| Haina | 4,563 | 0 (not detected) |
| Hawaii Volcanoes Nat.Park | 4,201 | 8.99 ppb |
| Hawaiian Beaches | 3,546 | 0 (not detected) |
| Waiohinu-Naalehu | 2,948 | 0 (not detected) |
Next steps for Waikoloa, HI
Look up your address in Waikoloa'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 Waikoloa 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.