Woods Bay Water And Sewer District, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 4 ppb (monitoring period 2023-2025). 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.
Who runs the water here
Woods Bay Water And Sewer District serves about 685 people through 265 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 Lake County, Montana. EPA system ID: MT0004698; phone on file: 406-837-0116. 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 2022 (3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Woods Bay Water And Sewer District is 4 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4 ppb |
| 2022 | 3 ppb |
| 2019 | 3 ppb |
| 2016 | 4 ppb |
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. Woods Bay Water And Sewer District's 4 ppb sits at the 91st percentile in Montana and the 88th nationally (higher means more lead).
Other water systems in Lake County
24 other systems share Lake County; 1 of them has a higher latest lead result than Woods Bay 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 |
|---|---|---|
| Polson City Of | 5,300 | 2 ppb |
| Ronan City Of | 2,483 | 0 (not detected) |
| Pablo Lake County Water And Sewer Dist | 2,175 | 0 (not detected) |
| St Ignatius Town Of | 700 | 1 ppb |
| Consolidated Charlo Lake Co W And S Dist | 450 | 0 (not detected) |
| Round Butte Water Company | 400 | 2 ppb |
| Jette Meadows Lake Co W And S Dist | 375 | 1 ppb |
| Jette Lake Landowners Association | 295 | 0 (not detected) |
| Ridgewood Estates | 250 | 2 ppb |
| Mission Meadows Rv Campsite Park, Inc | 200 | 0 (not detected) |
Next steps for Bigfork, MT
Test your own tap with a certified lab first-draw sample; Bigfork, 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 Woods Bay 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. Systems that went over once often dip back under; here is what that means.