Horseshoe Bend Water Supply, ID
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (monitoring period 2023-2025). 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.
Horseshoe Bend Water Supply at a glance
Horseshoe Bend Water Supply serves about 750 people through 411 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws surface water, in Boise County, Idaho. EPA system ID: ID4080024; phone on file: 208-793-2219. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is up 2 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Horseshoe Bend Water Supply is 2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2 ppb |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
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. Horseshoe Bend Water Supply's 2 ppb sits at the 71st percentile in Idaho and the 71st nationally (higher means more lead).
Other water systems in Boise County
19 other systems share Boise County; 8 of them have a higher latest lead result than Horseshoe Bend Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Idaho City Water Dept | 531 | 2 ppb |
| Wilderness Ranch Owners Association Inc | 525 | 4 ppb |
| Terrace Lakes Water Company | 475 | 4 ppb |
| Mountain View Water And Road Assn | 305 | 2 ppb |
| Castle Mountain Creeks Owners Assn | 250 | 1 ppb |
| Duquette Pines Homeowners Association | 163 | 1 ppb |
| Scriver Woods Homeowners Assn | 160 | 0 (not detected) |
| Mores Creek Rim Ranch Water Dist | 140 | 3 ppb |
| Rivers Point Property Owners Assn | 140 | 3 ppb |
| Valley Hi Estates | 140 | 8 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Horseshoe Bend, 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 Horseshoe Bend Water Supply 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.