Atalissa Municipal Water Supply, IA
Exceeded the action level in the past
Latest 90th-percentile lead: 1 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Atalissa Municipal Water Supply
Atalissa Municipal Water Supply serves about 296 people through 114 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 Muscatine County, Iowa. EPA system ID: IA7009071; phone on file: 319-333-4731. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2025 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Atalissa Municipal Water Supply is 20 ppb across 12 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2025 | 1 ppb |
| 2024 | 1 ppb |
| 2023 | 1 ppb |
| 2023 | 2 ppb |
| 2022 | 2 ppb |
| 2022 | 2 ppb |
| 2021 | 20 ppb over 15 |
| 2020 | 2 ppb |
| 2020 | 3 ppb |
| 2019 | 18 ppb over 15 |
| 2016 | 12 ppb over 10 |
Where this result ranks
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. Atalissa Municipal Water Supply's 1 ppb sits at the 41st percentile in Iowa and the 52nd nationally (higher means more lead).
Neighbouring systems
19 other systems share Muscatine County; 5 of them have a higher latest lead result than Atalissa Municipal Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Muscatine Power & Water | 25,516 | 3 ppb |
| West Liberty Water Utility | 3,938 | 0 (not detected) |
| Wilton Water Supply | 2,924 | 6 ppb |
| Ripleys Mhc Ia Llc | 520 | 2.8 ppb |
| Mark Twain Meadows Homeowners | 375 | 0 (not detected) |
| Park Plaza Mhp Llc | 188 | 0 (not detected) |
| Stockton Muni Water Supply | 176 | 0 (not detected) |
| Louisa Courts Mhp & Sales | 121 | 0 (not detected) |
| Rolling Acres Subdivision | 115 | 6 ppb |
| Rancho Valley Homeowners Assoc | 97 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Tipton, 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 Atalissa 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. Why sampled homes are the worst-case ones is in the guide to reading the number. More in what a past exceedance means today.