Superior, Town Of, WY
Exceeded the action level in the past
Latest 90th-percentile lead: 3 ppb (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 result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Who runs the water here
Superior, Town Of serves about 336 people through 120 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Sweetwater County, Wyoming. EPA system ID: WY5600092; phone on file: 307-362-8173. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2025 (3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Superior, Town Of is 17 ppb across 8 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 3 ppb |
| 2025 | 3 ppb |
| 2025 | 4 ppb |
| 2024 | 6 ppb |
| 2024 | 17 ppb over 15 |
| 2023 | 3 ppb |
| 2023 | 8 ppb |
| 2018 | 1 ppb |
How Superior, Town Of compares
Of the 311 Wyoming systems with a lead result, the median latest reading is 1 ppb; 0 are over 15 ppb right now and 16 have gone over at some point. Superior, Town Of's 3 ppb sits at the 80th percentile in Wyoming and the 82nd nationally (higher means more lead).
Neighbouring systems
20 other systems share Sweetwater County; 2 of them have a higher latest lead result than Superior, Town Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Rock Springs, City Of | 24,000 | 3 ppb |
| Green River, City Of | 10,500 | 2 ppb |
| White Mountain W&S District | 3,000 | 2 ppb |
| Little America Hotels & Resorts, Inc- Wy | 2,004 | 4 ppb |
| Pioneer Mobile Home Park | 1,000 | 3 ppb |
| Clearview I&S District | 930 | 3 ppb |
| Jamestown-Rio Vista W&S District | 560 | 0 (not detected) |
| Farson Eden School | 530 | 3 ppb |
| Wamsutter, Town Of | 500 | 2 ppb |
| Lewis Mobile Home Park | 370 | 2 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Superior, WY 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 Superior, Town 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. Why an old exceedance still matters: over the limit before, under it now.