Cold Springs Subd, 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 Cold Springs Subd
Cold Springs Subd serves about 300 people through 72 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Blaine County, Idaho. EPA system ID: ID5070015; phone on file: 208-726-4565. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Cold Springs Subd is 8 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 2 ppb |
| 2016 | 8 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. Cold Springs Subd's reported as 0 (not detected) sits at the 27th percentile in Idaho and the 18th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Blaine County
19 other systems share Blaine County; 14 of them have a higher latest lead result than Cold Springs Subd. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Hailey Water And Sewer | 8,000 | 2 ppb |
| Ketchum City Of | 3,555 | 9 ppb |
| Sun Valley Water And Sewer Dist | 3,400 | 4 ppb |
| Bellevue City Of | 2,747 | 0 (not detected) |
| Carey City Of | 993 | 4 ppb |
| Mid Valley Water Company Llc | 450 | 0 (not detected) |
| Hulen Meadows Water Company | 390 | 5 ppb |
| Heatherlands Subd | 200 | 1 ppb |
| Starweather Estates | 150 | 0 (not detected) |
| The Valley Club | 135 | 2.97 ppb |
Next steps for Ketchum, ID
Look up your address in Cold Springs Subd'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 Cold Springs Subd 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. Small systems behave differently: why small systems go over more often.