Atlanta Water Assn, ID
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2022-2024). 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.
About Atlanta Water Assn
Atlanta Water Assn serves about 91 people through 114 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Elmore County, Idaho. EPA system ID: ID4200005; phone on file: 208-412-8257. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 9 ppb from 10 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Atlanta Water Assn is 10 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1 ppb |
| 2021 | 10 ppb |
| 2018 | 5 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. Atlanta Water Assn's 1 ppb sits at the 43rd percentile in Idaho and the 51st nationally (higher means more lead).
Nearby utilities
22 other systems share Elmore County; 10 of them have a higher latest lead result than Atlanta Water Assn. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mountain Home, City Of | 14,651 | 0 (not detected) |
| Mountain Home Air Force Base | 7,500 | 4 ppb |
| Glenns Ferry City Of | 1,282 | 0 (not detected) |
| Trinity Estates Water Users Assn | 250 | 7 ppb |
| Mellen Subd Water Dist | 250 | 5 ppb |
| Canyon Creek Mobile Home Park | 243 | 3 ppb |
| Summerwind Water Users | 192 | 0 (not detected) |
| Sawtooth Estates Water Users | 175 | 9 ppb |
| Blue Sage Subdivision | 112 | 0 (not detected) |
| Simplot Livestock Company Grandview | 100 | 2 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Caldwell, 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 Atlanta Water Assn 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. Systems that went over once often dip back under; here is what that means.