Oakley Valley Water Corporation, ID
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2026). 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 Oakley Valley Water Corporation
Oakley Valley Water Corporation serves about 500 people through 178 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Cassia County, Idaho. EPA system ID: ID5160031; phone on file: 208-300-3680. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2025 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Oakley Valley Water Corporation is 9 ppb across 11 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 1 ppb |
| 2024 | 2 ppb |
| 2023 | 7 ppb |
| 2022 | 0 (not detected) |
| 2021 | 9 ppb |
| 2020 | 9 ppb |
| 2019 | 9 ppb |
| 2018 | 3 ppb |
| 2018 | 2 ppb |
| 2016 | 3 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. Oakley Valley Water Corporation's reported as 0 (not detected) sits at the 29th percentile in Idaho and the 22nd 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 Oakley Valley Water Corporation. 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) |
| Declo City Of | 350 | 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) |
What to do in your house
Look up your address in Oakley Valley Water Corporation'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 Oakley Valley Water Corporation 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.