Ten Mile Water And Sewer District, WY
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 14 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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
About Ten Mile Water And Sewer District
Ten Mile Water And Sewer District serves about 305 people through 165 service connections, which makes it a very small system under EPA's size classes. It is under mixed public and private ownership and draws surface water, in Sweetwater County, Wyoming. EPA system ID: WY5601369; phone on file: 307-362-7640. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is up 10 ppb from 4 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Ten Mile Water And Sewer District is 14 ppb across 4 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 14 ppb over 10 |
| 2022 | 4 ppb |
| 2019 | 1 ppb |
| 2016 | 0 (not detected) |
Against other Wyoming systems
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. Ten Mile Water And Sewer District's 14 ppb sits at the 99th percentile in Wyoming and the 99th nationally (higher means more lead).
Neighbouring systems
20 other systems share Sweetwater County; 0 of them have a higher latest lead result than Ten Mile Water And Sewer District. 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 |
Next steps for Rock Springs, WY
Test your own tap with a certified lab first-draw sample; Rock Springs, 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 Ten Mile Water And Sewer District 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. See what changes at 10 ppb in 2027.