Horizon Ridge Subdivision, ID
No lead results on file with EPA
Latest 90th-percentile lead: no result on file. The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. EPA's database has no Lead and Copper Rule results for this system. Without them there is nothing to go on, so a tap test is the only way to know.
About Horizon Ridge Subdivision
Horizon Ridge Subdivision serves about 75 people through 29 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Canyon County, Idaho. EPA system ID: ID3140281. Ask the utility on your bill for your address in their service line inventory.
Other water systems in Canyon County
82 other systems share Canyon County. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Nampa City Of | 100,200 | 1 ppb |
| Caldwell City Of | 78,740 | 0 (not detected) |
| Middleton City Of | 13,190 | 2 ppb |
| Parma City Of | 2,250 | 1 ppb |
| Wilder City Of | 1,690 | 5 ppb |
| Caldwell Housing Authority | 1,100 | 9 ppb |
| Greenleaf City Of | 846 | 2 ppb |
| Melba City Of | 648 | 3 ppb |
| Notus City Of | 539 | 2 ppb |
| Shalimar Subd | 370 | 1 ppb |
Next steps for Nampa, ID
Test your own tap with a certified lab first-draw sample; Nampa, 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 Horizon Ridge Subdivision 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. The action level is dropping - the 10 ppb rule from 2027.