Sweetgrass Water Users Assn, MT
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 15 ppb (monitoring period 2016-2018). 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.
Sweetgrass Water Users Assn at a glance
Sweetgrass Water Users Assn serves about 100 people through 98 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Toole County, Montana. EPA system ID: MT0000340; phone on file: 406-335-4150. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
The highest 90th-percentile result EPA holds for Sweetgrass Water Users Assn is 15 ppb across 1 monitoring period, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2018 | 15 ppb over 10 |
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. Sweetgrass Water Users Assn's 15 ppb sits at the 99th percentile in Montana and the 99th nationally (higher means more lead).
Other water systems in Toole County
14 other systems share Toole County; 0 of them have a higher latest lead result than Sweetgrass Water Users Assn. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Shelby City Of | 3,970 | 2 ppb |
| Sunburst Town Of | 459 | 1 ppb |
| Oilmont County Water District | 300 | 0 (not detected) |
| Ncmrwa North Shelby | 300 | 0 (not detected) |
| Kevin Town Of | 290 | 12 ppb |
| Galata County Water District | 200 | 0 (not detected) |
| Rimrock Colony | 124 | 0 (not detected) |
| Hillside Colony Inc | 100 | 0 (not detected) |
| Camrose Colony | 95 | 0 (not detected) |
| Nine Mile Co Water And Sewer District | 90 | 1 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Sweet Grass, 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 Sweetgrass Water Users Assn 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. This system is in the band the 2027 10 ppb rule changes.