Cottonwood Acres Div 4, ID
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2021-2023). 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.
Cottonwood Acres Div 4 at a glance
Cottonwood Acres Div 4 serves about 43 people through 17 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Bonneville County, Idaho. EPA system ID: ID7100022; phone on file: 208-360-0120. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2020 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Cottonwood Acres Div 4 is 1 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 1 ppb |
| 2017 | 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. Cottonwood Acres Div 4's reported as 0 (not detected) sits at the 4th percentile in Idaho and the 2nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
32 other systems share Bonneville County; 21 of them have a higher latest lead result than Cottonwood Acres Div 4. 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 |
| Ammon City Of | 17,338 | 0 (not detected) |
| 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 |
Next steps for Idaho Falls, ID
Look up your address in Cottonwood Acres Div 4'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 Cottonwood Acres Div 4 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. Small systems behave differently: why small systems go over more often.