Kootenai County Water Dist 1, ID
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Kootenai County Water Dist 1 at a glance
Kootenai County Water Dist 1 serves about 843 people through 337 service connections, which makes it a small system under EPA's size classes. It is under mixed public and private ownership and draws surface water, in Kootenai County, Idaho. EPA system ID: ID1280106; phone on file: 650-948-9556. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 9 ppb from 9 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Kootenai County Water Dist 1 is 147 ppb across 10 monitoring periods, 3 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 9 ppb |
| 2025 | 9 ppb |
| 2024 | 6 ppb |
| 2024 | 10 ppb |
| 2023 | 21 ppb over 15 |
| 2023 | 8 ppb |
| 2022 | 16 ppb over 15 |
| 2021 | 147 ppb over 15 |
| 2018 | 5 ppb |
Against other Idaho systems
Of the 763 Idaho systems with a lead result, the median latest reading is 1 ppb; 3 are over 15 ppb right now and 46 have gone over at some point. Kootenai County Water Dist 1's reported as 0 (not detected) sits at the 32nd percentile in Idaho and the 26th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
112 other systems share Kootenai County; 75 of them have a higher latest lead result than Kootenai County Water Dist 1. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Coeur D Alene City Of | 54,115 | 2 ppb |
| Post Falls City Of | 20,285 | 1 ppb |
| East Greenacres Irrigation Dist | 11,165 | 3 ppb |
| Ross Point Water Dist | 10,473 | 2 ppb |
| Rathdrum City Of | 10,358 | 0 (not detected) |
| Hayden Lake Irrigation Dist | 9,375 | 0 (not detected) |
| Avondale Irrigation Dist | 8,785 | 0 (not detected) |
| Hillside Service Area | 4,140 | 1 ppb |
| Rimrock Service Area | 3,493 | 0 (not detected) |
| Spirit Lake City Of | 2,825 | 1.6 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Coeur D'Alene, ID may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Kootenai County Water Dist 1 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. More in what a past exceedance means today.