Northville Crossing, MI
Lead detected, under the action levels
Latest 90th-percentile lead: 5 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 Northville Crossing
Northville Crossing serves about 1,890 people through 756 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Washtenaw County, Michigan. EPA system ID: MI0040657; phone on file: 248-864-0358. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Northville Crossing's lead record
The highest 90th-percentile result EPA holds for Northville Crossing is 5 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 5 ppb |
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. Northville Crossing's 5 ppb sits at the 88th percentile in Michigan and the 91st nationally (higher means more lead).
Neighbouring systems
30 other systems share Washtenaw County; 2 of them have a higher latest lead result than Northville Crossing. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Ann Arbor | 123,851 | 2.3 ppb |
| Ypsilanti Community Utility Authority | 53,988 | 4.1 ppb |
| Pittsfield Township | 24,500 | 0 (not detected) |
| Saline | 9,158 | 0 (not detected) |
| Scio Township | 8,500 | 0 (not detected) |
| Milan | 7,363 | 5.1 ppb |
| Superior Township | 6,830 | 0 (not detected) |
| Chelsea | 5,474 | 0 (not detected) |
| Dexter | 4,500 | 0 (not detected) |
| Augusta Township | 3,907 | 0 (not detected) |
Next steps for Southfield, MI
Test your own tap with a certified lab first-draw sample; Southfield, MI 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 Northville Crossing 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. Size matters more than most people expect: small vs large water systems.