Declo City Of, ID
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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.
About Declo City Of
Declo City Of serves about 350 people through 140 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Cassia County, Idaho. EPA system ID: ID5160012; phone on file: 208-670-9566. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 2 ppb from 2 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Declo City Of is 2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 2 ppb |
| 2019 | 2 ppb |
| 2016 | 2 ppb |
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. Declo City Of's reported as 0 (not detected) sits at the 27th percentile in Idaho and the 20th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
11 other systems share Cassia County; 1 of them has a higher latest lead result than Declo City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Burley Water Dept | 10,345 | 0 (not detected) |
| Oakley City Of | 821 | 0 (not detected) |
| Oakley Valley Water Corporation | 500 | 0 (not detected) |
| Albion City Of | 325 | 1 ppb |
| View Water Development Company | 112 | 0 (not detected) |
| Golden Rail Trailer Court | 70 | 0 (not detected) |
| Nielsons Country Court | 70 | 0 (not detected) |
| Spring Creek Terraces | 70 | 0 (not detected) |
| Del Rio Estates | 60 | 0 (not detected) |
| Riverside Trailer Court | 35 | 0 (not detected) |
Your move
Look up your address in Declo 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 Declo 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. A zero today does not rule out a jump later - the rules are tightening in 2027.