Ammon City Of, ID
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2023). 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.
Who runs the water here
Ammon City Of serves about 17,338 people through 6,487 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Bonneville County, Idaho. EPA system ID: ID7100004; phone on file: 208-612-4038. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Ammon City Of's lead record
Against the period ending 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Ammon City Of is 2 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 1 ppb |
| 2019 | 2 ppb |
| 2016 | 1 ppb |
How Ammon City Of compares
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. Ammon City Of's reported as 0 (not detected) sits at the 36th percentile in Idaho and the 38th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Bonneville County
32 other systems share Bonneville County; 21 of them have a higher latest lead result than Ammon City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Idaho Falls City Of | 69,450 | 3 ppb |
| Falls Water Company Inc | 22,650 | 3 ppb |
| Iona Water Dept | 2,717 | 1 ppb |
| Comore Loma | 1,626 | 1 ppb |
| Ucon City Of | 1,161 | 0 (not detected) |
| 3d Water Association | 680 | 1 ppb |
| Taylor Mountain Water And Sewer District | 600 | 0 (not detected) |
| J And K Water Corp | 370 | 3 ppb |
| Blackhawk Estates/Iron Rim | 270 | 3 ppb |
| Country Life Estates | 250 | 0 (not detected) |
Next steps for Ammon, ID
Look up your address in Ammon City Of'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 Ammon City Of 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. Small systems behave differently: why small systems go over more often.