Corunna, City Of, MI
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2022-2024). 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.
About Corunna, City Of
Corunna, City Of serves about 2,028 people through 845 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 Shiawassee County, Michigan. EPA system ID: MI0001640; phone on file: 989-743-5040. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
The highest 90th-percentile result EPA holds for Corunna, City Of is 0 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
Against other Michigan systems
Of the 1,227 Michigan systems with a lead result, the median latest reading is 1 ppb; 31 are over 15 ppb right now and 109 have gone over at some point. Corunna, City Of's reported as 0 (not detected) sits at the 27th percentile in Michigan and the 31st nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Shiawassee County
17 other systems share Shiawassee County; 9 of them have a higher latest lead result than Corunna, City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Owosso, City Of | 16,353 | 9 ppb |
| Durand, City Of | 3,446 | 3 ppb |
| Perry, City Of | 2,065 | 3 ppb |
| Bancroft, Village Of | 616 | 0 (not detected) |
| New Lothrop, Village Of | 610 | 2 ppb |
| Byron, Village Of | 581 | 2 ppb |
| Woods And Fields Communities East | 528 | - |
| Countryside Village | 490 | 1 ppb |
| Morrice Meadows | 258 | - |
| Northwoods Community | 238 | 3 ppb |
Next steps for Corunna, MI
Look up your address in Corunna, City Of'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 Corunna, City Of 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. A zero today does not rule out a jump later - the rules are tightening in 2027.