Osage Municipal Water Supply, IA
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 11.4 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. 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.
Who runs the water here
Osage Municipal Water Supply serves about 3,637 people through 1,952 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Mitchell County, Iowa. EPA system ID: IA6663001; phone on file: 641-732-3709. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is up 4 ppb from 7.4 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Osage Municipal Water Supply is 11.4 ppb across 3 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 11.4 ppb over 10 |
| 2021 | 7.4 ppb |
| 2018 | 6.2 ppb |
How Osage Municipal Water Supply compares
Of the 1,066 Iowa systems with a lead result, the median latest reading is 1.4 ppb; 4 are over 15 ppb right now and 36 have gone over at some point. Osage Municipal Water Supply's 11.4 ppb sits at the 98th percentile in Iowa and the 98th nationally (higher means more lead).
Neighbouring systems
3 other systems share Mitchell County; 0 of them have a higher latest lead result than Osage Municipal Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| St Ansgar Water Supply | 1,161 | 1.58 ppb |
| Stacyville Water Supply | 465 | 0 (not detected) |
| Orchard Water Works | 68 | 8 ppb |
Next steps for Osage, IA
Test your own tap with a certified lab first-draw sample; Osage, IA 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 Osage Municipal Water Supply 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. This system is in the band the 2027 10 ppb rule changes.