Wilder City Of, ID
Lead detected, under the action levels
Latest 90th-percentile lead: 5 ppb (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. 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.
Wilder City Of at a glance
Wilder City Of serves about 1,690 people through 535 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Canyon County, Idaho. EPA system ID: ID3140138; phone on file: 208-941-6337. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is up 5 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Wilder City Of is 11 ppb across 4 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 5 ppb |
| 2022 | 0 (not detected) |
| 2019 | 11 ppb over 10 |
| 2016 | 0 (not detected) |
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. Wilder City Of's 5 ppb sits at the 91st percentile in Idaho and the 91st nationally (higher means more lead).
Nearby utilities
82 other systems share Canyon County; 7 of them have a higher latest lead result than Wilder City Of. 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 |
| 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 |
| Belle Aire Acres 2 | 350 | 1 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Wilder, 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 Wilder City Of 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.