Hallmark Terrace Mobile Home Park, MN
Exceeded the action level in the past
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 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.
Who runs the water here
Hallmark Terrace Mobile Home Park serves about 170 people through 127 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Olmsted County, Minnesota. EPA system ID: MN1550029; phone on file: 5072825111. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2024 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hallmark Terrace Mobile Home Park is 21 ppb across 4 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2023 | 21 ppb over 15 |
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. Hallmark Terrace Mobile Home Park's reported as 0 (not detected) sits at the 17th percentile in Minnesota and the 14th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Olmsted County
16 other systems share Olmsted County; 12 of them have a higher latest lead result than Hallmark Terrace Mobile Home Park. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Rochester | 123,624 | 7 ppb |
| Stewartville | 6,850 | 3 ppb |
| Byron | 6,809 | 2 ppb |
| Eyota | 2,043 | 2 ppb |
| Oronoco | 2,040 | 2 ppb |
| Dover | 895 | 5 ppb |
| Chester Heights | 300 | 5 ppb |
| Zumbro Ridge Estates | 270 | 0 (not detected) |
| Sandy Slopes Community | 158 | 0 (not detected) |
| Meadowbrook Addition | 125 | 2 ppb |
Next steps for Rochester, MN
Test your own tap with a certified lab first-draw sample; Rochester, 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 Hallmark Terrace Mobile Home Park 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Why an old exceedance still matters: over the limit before, under it now.