Amboy, MN
Exceeded the action level in the past
Latest 90th-percentile lead: 6 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 Amboy
Amboy serves about 535 people through 255 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 Blue Earth County, Minnesota. EPA system ID: MN1070001; phone on file: 5076743018. They can tell you what your service line is made of and whether they pay to replace it.
Amboy's lead record
That is down 6 ppb from 12 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Amboy is 186 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 6 ppb |
| 2025 | 12 ppb over 10 |
| 2025 | 186 ppb over 15 |
| 2024 | 11 ppb over 10 |
| 2023 | 2 ppb |
| 2020 | 2 ppb |
How Amboy compares
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. Amboy's 6 ppb sits at the 93rd percentile in Minnesota and the 93rd nationally (higher means more lead).
Neighbouring systems
16 other systems share Blue Earth County; 0 of them have a higher latest lead result than Amboy. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mankato | 42,803 | 2 ppb |
| Eagle Lake | 3,268 | 1 ppb |
| Lake Crystal | 2,554 | 2 ppb |
| Mapleton | 1,756 | 2 ppb |
| Madison Lake | 1,017 | 0 (not detected) |
| Saint Clair | 846 | 6 ppb |
| Good Thunder | 583 | 2 ppb |
| South Bend Township | 325 | 1 ppb |
| Vernon Center | 323 | 1 ppb |
| Skyline | 289 | 0 (not detected) |
Next steps for Amboy, MN
Test your own tap with a certified lab first-draw sample; Amboy, MN 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 Amboy whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 2050 ppb (copper action level 1,300 ppb).
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. More in what a past exceedance means today.