Northfield, MN
Lead detected, under the action levels
Latest 90th-percentile lead: 3 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.
Northfield at a glance
Northfield serves about 20,790 people through 5,418 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Rice County, Minnesota. EPA system ID: MN1660010; phone on file: 5076458833. 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 2 ppb from 1 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Northfield is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3 ppb |
| 2022 | 1 ppb |
| 2019 | 3 ppb |
| 2016 | 1 ppb |
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. Northfield's 3 ppb sits at the 86th percentile in Minnesota and the 83rd nationally (higher means more lead).
Nearby utilities
13 other systems share Rice County; 1 of them has a higher latest lead result than Northfield. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Faribault | 23,718 | 19 ppb |
| Lonsdale | 5,079 | 1 ppb |
| Carleton College | 2,485 | 0 (not detected) |
| Mn Correctional Facility - Faribault | 2,103 | 0 (not detected) |
| Dundas | 1,490 | 3 ppb |
| Morristown | 987 | 3 ppb |
| Nerstrand | 299 | 0 (not detected) |
| Webster | 190 | 0 (not detected) |
| Rolling Green First Addition | 110 | 1 ppb |
| Millstone Creek Mobile Home Park | 90 | 1 ppb |
Next steps for Northfield, MN
Test your own tap with a certified lab first-draw sample; Northfield, 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 Northfield 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. The lead result guide covers how utilities pick the homes they sample. The action level is dropping - the 10 ppb rule from 2027.