Lewiston, MN
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Lewiston serves about 1,512 people through 604 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 Winona County, Minnesota. EPA system ID: MN1850006; phone on file: 5075232257. They can tell you what your service line is made of and whether they pay to replace it.
Lewiston's lead record
Against the period ending 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Lewiston is 0 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2023 | 0 (not detected) |
Where this result ranks
Of the 966 Minnesota systems with a lead result, the median latest reading is 0 ppb; 7 are over 15 ppb right now and 48 have gone over at some point. Lewiston's reported as 0 (not detected) sits at the 40th percentile in Minnesota and the 29th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Winona County
11 other systems share Winona County; 8 of them have a higher latest lead result than Lewiston. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Winona | 27,782 | 2 ppb |
| Goodview | 4,158 | 1 ppb |
| Saint Charles | 3,825 | 0 (not detected) |
| Stockton | 697 | 3 ppb |
| Rollingstone | 664 | 1 ppb |
| Altura | 493 | 5 ppb |
| Hidden Valley Mobile Home Park | 464 | 0 (not detected) |
| Utica | 293 | 1 ppb |
| Elba | 146 | 2 ppb |
| Green Terrace Mobile Estates | 86 | 0 (not detected) |
What to do in your house
Look up your address in Lewiston's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Lewiston 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. A zero today does not rule out a jump later - the rules are tightening in 2027.