Manderson, Town Of, WY
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 13 ppb (monitoring period 2021-2023). 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.
Manderson, Town Of at a glance
Manderson, Town Of serves about 110 people through 59 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 Big Horn County, Wyoming. EPA system ID: WY5600204; phone on file: 000-000-0000. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is up 2 ppb from 11 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Manderson, Town Of is 13 ppb across 3 monitoring periods, none of them over 15 ppb (2 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 13 ppb over 10 |
| 2020 | 11 ppb over 10 |
| 2017 | 4 ppb |
How Manderson, 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. Manderson, Town Of's 13 ppb sits at the 99th percentile in Wyoming and the 98th nationally (higher means more lead).
Neighbouring systems
14 other systems share Big Horn County; 0 of them have a higher latest lead result than Manderson, Town Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Lovell, Town Of | 2,250 | 0 (not detected) |
| Greybull, Town Of | 2,080 | 1 ppb |
| Basin, Town Of | 1,250 | 3 ppb |
| South Big Horn County Jpb | 900 | 1 ppb |
| Cowley, Town Of | 800 | 3 ppb |
| Byron, Town Of | 561 | 0 (not detected) |
| Burlington, Town Of | 348 | 1 ppb |
| Deaver Municipal Water System | 176 | 0 (not detected) |
| Frannie, Town Of | 160 | 1 ppb |
| South End Water Users S&I District | 150 | 0 (not detected) |
Next steps for Basin, WY
Test your own tap with a certified lab first-draw sample; Basin, 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 Manderson, 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. What a 90th-percentile result does and does not tell you: how to read a lead result. This system is in the band the 2027 10 ppb rule changes.