Blackhawk On The River, ID
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2025-2025). 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.
Blackhawk On The River at a glance
Blackhawk On The River serves about 150 people through 28 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Valley County, Idaho. EPA system ID: ID4430105; phone on file: 208-350-1252. 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 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Blackhawk On The River is 1 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1 ppb |
| 2025 | 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. Blackhawk On The River's 1 ppb sits at the 46th percentile in Idaho and the 52nd nationally (higher means more lead).
Nearby utilities
10 other systems share Valley County; 6 of them have a higher latest lead result than Blackhawk On The River. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mccall City Of | 4,423 | 5 ppb |
| Cascade City Of | 1,000 | 6 ppb |
| Meadows At West Mountain | 550 | 0 (not detected) |
| Fir Grove Estates | 270 | 5 ppb |
| Day Star | 250 | 2 ppb |
| Donnelly City Of | 237 | 0 (not detected) |
| Jughandle Estates | 200 | 0 (not detected) |
| Jug Mountain Ranch Subdivision | 100 | 1 ppb |
| Yellow Pine Water Users Inc | 72 | 2 ppb |
| Hawks Bay Estates Hoa Llc | 59 | 3 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Boise, 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 Blackhawk On The River 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.