Glyndon, MN
Lead detected, under the action levels
Latest 90th-percentile lead: 3 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. 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.
Who runs the water here
Glyndon serves about 1,386 people through 416 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 Clay County, Minnesota. EPA system ID: MN1140005; phone on file: 2184982578. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is up 3 ppb from 0 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Glyndon is 10 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 3 ppb |
| 2025 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2024 | 10 ppb |
| 2021 | 4 ppb |
How Glyndon 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. Glyndon's 3 ppb sits at the 83rd percentile in Minnesota and the 82nd nationally (higher means more lead).
Nearby utilities
12 other systems share Clay County; 1 of them has a higher latest lead result than Glyndon. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Moorhead | 44,583 | 9 ppb |
| Dilworth | 4,918 | 0 (not detected) |
| Barnesville | 2,784 | 3 ppb |
| Hawley | 2,267 | 0 (not detected) |
| Sabin | 629 | 0 (not detected) |
| Ulen | 500 | 1 ppb |
| Hitterdal | 208 | 1 ppb |
| Spring Prairie Colony | 200 | 0 (not detected) |
| Felton | 178 | 0 (not detected) |
| John Bouton Housing Development | 125 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Glyndon, 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 Glyndon whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1630 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. Systems that went over once often dip back under; here is what that means.