Sheridan Town Of, MT
Exceeded the action level in the past
Latest 90th-percentile lead: 2 ppb (monitoring period 2022-2024). 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
Sheridan Town Of serves about 632 people through 413 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 Madison County, Montana. EPA system ID: MT0000329; phone on file: 406-842-5431. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
Against the period ending 2019 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Sheridan Town Of is 32 ppb across 8 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2 ppb |
| 2019 | 2 ppb |
| 2018 | 3 ppb |
| 2018 | 4 ppb |
| 2017 | 4 ppb |
| 2017 | 3 ppb |
| 2016 | 11 ppb over 10 |
| 2016 | 32 ppb over 15 |
Against other Montana systems
Of the 753 Montana systems with a lead result, the median latest reading is 1 ppb; 5 are over 15 ppb right now and 28 have gone over at some point. Sheridan Town Of's 2 ppb sits at the 73rd percentile in Montana and the 71st nationally (higher means more lead).
Other water systems in Madison County
10 other systems share Madison County; 2 of them have a higher latest lead result than Sheridan Town Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Big Sky County Water And Sewer Dist 363 | 4,132 | 4.84 ppb |
| Virginia City Water Dept | 1,500 | 0 (not detected) |
| Ennis Town Of | 1,400 | 0 (not detected) |
| Andesite Ridge Water System | 450 | 3 ppb |
| Twin Bridges Town Of | 424 | 2 ppb |
| Mt Moonlight Basin | 355 | 0.28 ppb |
| Lower Pioneer Mountain Water System | 350 | 1 ppb |
| Valley Garden Golf Village Hoa | 195 | 1 ppb |
| Encampment Trail | 100 | 0 (not detected) |
| Lone View Ridge Water System | 37 | 1 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Sheridan, MT 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 Sheridan 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. Why an old exceedance still matters: over the limit before, under it now.