Coleraine, MN
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2025-2025). 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.
Coleraine at a glance
Coleraine serves about 1,997 people through 510 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 Itasca County, Minnesota. EPA system ID: MN1310006; phone on file: 2182452112. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Coleraine's lead record
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Coleraine is 3 ppb across 11 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2021 | 1 ppb |
| 2019 | 3 ppb |
| 2018 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2017 | 0 (not detected) |
Against other Minnesota systems
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. Coleraine's reported as 0 (not detected) sits at the 42nd percentile in Minnesota and the 31st nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
16 other systems share Itasca County; 4 of them have a higher latest lead result than Coleraine. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Grand Rapids | 11,346 | 4 ppb |
| Keewatin | 1,068 | 0 (not detected) |
| Cohasset Municipal Water System | 1,000 | 0 (not detected) |
| Nashwauk | 971 | 0 (not detected) |
| Deer River | 942 | 3 ppb |
| Bovey | 821 | 3 ppb |
| Marble | 699 | 0 (not detected) |
| Laprairie | 653 | 3 ppb |
| Taconite | 644 | 0 (not detected) |
| Bigfork | 397 | 0 (not detected) |
What to do in your house
Look up your address in Coleraine'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 Coleraine whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1930 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Small systems behave differently: why small systems go over more often.