South Wind Water And Sewer District, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 3 ppb (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About South Wind Water And Sewer District
South Wind Water And Sewer District serves about 200 people through 95 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 Cascade County, Montana. EPA system ID: MT0000025; phone on file: 406-788-0137. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
South Wind Water And Sewer District's lead record
That is up 2 ppb from 1 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for South Wind Water And Sewer District is 6 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3 ppb |
| 2024 | 1 ppb |
| 2023 | 5 ppb |
| 2019 | 0 (not detected) |
| 2017 | 4 ppb |
| 2017 | 6 ppb |
| 2016 | 0 (not detected) |
How South Wind 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. South Wind Water And Sewer District's 3 ppb sits at the 84th percentile in Montana and the 81st nationally (higher means more lead).
Neighbouring systems
41 other systems share Cascade County; 3 of them have a higher latest lead result than South Wind 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 |
|---|---|---|
| Great Falls City Of | 60,000 | 12 ppb |
| Malmstrom Air Force Base | 8,850 | 0 (not detected) |
| Sun Prairie Village County | 1,800 | 1 ppb |
| Black Eagle Cascade County Water Sewer | 1,233 | 0 (not detected) |
| Prairie Water Company | 1,000 | 0 (not detected) |
| Cascade Town Of | 650 | 2 ppb |
| Belt Town Of | 600 | 0 (not detected) |
| Vaughn Cascade County Water And Sewer | 585 | 0 (not detected) |
| Two Buttes Water Users Assn | 525 | 2 ppb |
| Gore Hill County Water Dist | 500 | 1 ppb |
Next steps for Great Falls, MT
Test your own tap with a certified lab first-draw sample; Great Falls, 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 South Wind 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. Size matters more than most people expect: small vs large water systems.