Granite Falls, MN
Lead detected, under the action levels
Latest 90th-percentile lead: 10 ppb (monitoring period 2021-2023). 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.
About Granite Falls
Granite Falls serves about 2,843 people through 1,219 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 Yellow Medicine County, Minnesota. EPA system ID: MN1870004; phone on file: 3205643011. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
The highest 90th-percentile result EPA holds for Granite Falls is 10 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 10 ppb |
How Granite Falls 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. Granite Falls's 10 ppb sits at the 97th percentile in Minnesota and the 97th nationally (higher means more lead).
Other water systems in Yellow Medicine County
8 other systems share Yellow Medicine County; 0 of them have a higher latest lead result than Granite Falls. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Canby | 1,769 | 2 ppb |
| Clarkfield | 841 | 3 ppb |
| Wood Lake | 423 | 0 (not detected) |
| Hanley Falls | 275 | 1 ppb |
| Echo | 269 | 0 (not detected) |
| Porter | 180 | 0 (not detected) |
| Saint Leo | 97 | 0 (not detected) |
| Hazel Run | 61 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Granite Falls, 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 Granite Falls 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. The action level is dropping - the 10 ppb rule from 2027.