Southfork Landing Inc, 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 Southfork Landing Inc
Southfork Landing Inc serves about 25 people through 31 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Boise County, Idaho. EPA system ID: ID4080117; phone on file: 208-859-8826. 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 3 ppb from 3 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Southfork Landing Inc is 3 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 3 ppb |
| 2024 | 2 ppb |
| 2023 | 0 (not detected) |
| 2023 | 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. Southfork Landing Inc's reported as 0 (not detected) sits at the 1st percentile in Idaho and the 0th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Boise County
19 other systems share Boise County; 15 of them have a higher latest lead result than Southfork Landing Inc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Horseshoe Bend Water Supply | 750 | 2 ppb |
| Idaho City Water Dept | 531 | 2 ppb |
| Wilderness Ranch Owners Association Inc | 525 | 4 ppb |
| Terrace Lakes Water Company | 475 | 4 ppb |
| Mountain View Water And Road Assn | 305 | 2 ppb |
| Castle Mountain Creeks Owners Assn | 250 | 1 ppb |
| Duquette Pines Homeowners Association | 163 | 1 ppb |
| Scriver Woods Homeowners Assn | 160 | 0 (not detected) |
| Mores Creek Rim Ranch Water Dist | 140 | 3 ppb |
| Rivers Point Property Owners Assn | 140 | 3 ppb |
Next steps for Garden Valley, ID
Look up your address in Southfork Landing Inc'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 Southfork Landing Inc 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.