Rupert City Of, ID
Lead detected, under the action levels
Latest 90th-percentile lead: 3 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.
Who runs the water here
Rupert City Of serves about 5,796 people through 2,629 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Minidoka County, Idaho. EPA system ID: ID5340017; phone on file: 208-436-9600. They can tell you what your service line is made of and whether they pay to replace it.
Rupert City Of's lead record
Against the period ending 2021 (3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Rupert City Of is 3 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3 ppb |
| 2021 | 3 ppb |
| 2018 | 2 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. Rupert City Of's 3 ppb sits at the 81st percentile in Idaho and the 83rd nationally (higher means more lead).
Nearby utilities
7 other systems share Minidoka County; 2 of them have a higher latest lead result than Rupert City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Heyburn City Of | 3,000 | 0 (not detected) |
| Paul City Of | 1,195 | 0 (not detected) |
| Paul Housing Authority | 250 | 4 ppb |
| Pelican Point Subdivision | 142 | 0 (not detected) |
| Jbs Country Court | 140 | 1.16 ppb |
| Minidoka City Of | 120 | 6 ppb |
| Wayside Estates | 50 | 0 (not detected) |
Next steps for Rupert, ID
Test your own tap with a certified lab first-draw sample; Rupert, 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 Rupert 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. What a 90th-percentile result does and does not tell you: how to read a lead result. The action level is dropping - the 10 ppb rule from 2027.