Hnl-Windward-Pearl Harbor, HI
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2016-2018). 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.
Hnl-Windward-Pearl Harbor at a glance
Hnl-Windward-Pearl Harbor serves about 631,389 people through 106,491 service connections, which makes it a very large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Honolulu County, Hawaii. EPA system ID: HI0000331; phone on file: 808-748-5080. They can tell you what your service line is made of and whether they pay to replace it.
Hnl-Windward-Pearl Harbor's lead record
The highest 90th-percentile result EPA holds for Hnl-Windward-Pearl Harbor is 0 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2018 | 0 (not detected) |
How Hnl-Windward-Pearl Harbor 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. Hnl-Windward-Pearl Harbor's reported as 0 (not detected) sits at the 91st percentile in Hawaii and the 40th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
28 other systems share Honolulu County; 0 of them have a higher latest lead result than Hnl-Windward-Pearl Harbor. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Waipahu-Ewa-Waianae | 217,479 | 0 (not detected) |
| Joint Base Pearl Harbor-Hickam | 65,230 | 0 (not detected) |
| Mililani | 50,573 | 0 (not detected) |
| Schofield Barracks | 37,920 | 0 (not detected) |
| Wahiawa | 23,348 | 0 (not detected) |
| Marine Corps Base Hawaii | 16,300 | 0 (not detected) |
| Waipio Heights | 11,516 | 0 (not detected) |
| Waialua-Haleiwa | 9,996 | 0 (not detected) |
| Fort Shafter | 7,067 | 0 (not detected) |
| Nctams Eastpac | 6,470 | 0 (not detected) |
What to do in your house
Look up your address in Hnl-Windward-Pearl Harbor'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 Hnl-Windward-Pearl Harbor 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. What a 90th-percentile result does and does not tell you: how to read a lead result. A zero today does not rule out a jump later - the rules are tightening in 2027.