Roy Water And Sewer District, MT
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Roy Water And Sewer District at a glance
Roy Water And Sewer District serves about 110 people through 84 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 Fergus County, Montana. EPA system ID: MT0002395; phone on file: 406-366-1217. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 2 ppb from 2 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Roy Water And Sewer District is 4 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2023 | 2 ppb |
| 2016 | 4 ppb |
How Roy Water And Sewer District compares
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. Roy Water And Sewer District's reported as 0 (not detected) sits at the 21st percentile in Montana and the 10th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Fergus County
10 other systems share Fergus County; 1 of them has a higher latest lead result than Roy 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 |
|---|---|---|
| Lewistown City Of | 5,923 | 0 (not detected) |
| Mountain Acres Mb Hm Pk | 320 | 0 (not detected) |
| Winifred Town Of | 274 | 0 (not detected) |
| Denton Town Of | 255 | 4 ppb |
| Moore Town Of | 186 | 0 (not detected) |
| Grass Range Town Of | 102 | 0 (not detected) |
| Ayers Hutterite Colony | 58 | 0 (not detected) |
| King Ranch Colony | 56 | 0 (not detected) |
| Deerfield Hutterite Colony | 51 | 0 (not detected) |
| Spring Creek Colony Lewistown | 48 | 0 (not detected) |
Next steps for Roy, MT
Look up your address in Roy Water And Sewer District's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Roy 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Small systems behave differently: why small systems go over more often.