Cabinet Mountains Water Dist, ID
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Who runs the water here
Cabinet Mountains Water Dist serves about 2,335 people through 928 service connections, which makes it a small system under EPA's size classes. It is under mixed public and private ownership and draws groundwater, in Boundary County, Idaho. EPA system ID: ID1110042; phone on file: 208-267-3616. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Cabinet Mountains Water Dist's lead record
Against the period ending 2022 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Cabinet Mountains Water Dist is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1 ppb |
| 2022 | 2 ppb |
| 2019 | 2.7 ppb |
| 2016 | 3 ppb |
Where this result ranks
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. Cabinet Mountains Water Dist's 1 ppb sits at the 55th percentile in Idaho and the 54th nationally (higher means more lead).
Other water systems in Boundary County
13 other systems share Boundary County; 7 of them have a higher latest lead result than Cabinet Mountains Water Dist. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Bonners Ferry City Of | 3,367 | 0 (not detected) |
| Three Mile Water Dist | 2,652 | 11 ppb |
| Moyie Springs City Of | 1,123 | 2 ppb |
| Bee Line Water Assn Inc | 533 | 2 ppb |
| Mission Creek Water Assn | 263 | 1 ppb |
| Paradise Valley Water Assn | 250 | 2 ppb |
| Twenty Mile Creek Water Assn | 225 | 5 ppb |
| Skin Creek Water Assn | 200 | 4 ppb |
| Trow Creek Water Assn | 98 | 1 ppb |
| Moravia Water Assn | 80 | 1 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Bonners Ferry, 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 Cabinet Mountains Water Dist 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. Size matters more than most people expect: small vs large water systems.