St. Clair Township, MI
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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.
Who runs the water here
St. Clair Township serves about 3,270 people through 1,090 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 surface water, in St. Clair County, Michigan. EPA system ID: MI0006282. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2020 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for St. Clair Township is 9.3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2018 | 9.3 ppb |
| 2017 | 3.1 ppb |
How St. Clair Township compares
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. St. Clair Township's reported as 0 (not detected) sits at the 29th percentile in Michigan and the 33rd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in St. Clair County
22 other systems share St. Clair County; 12 of them have a higher latest lead result than St. Clair Township. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Port Huron, City Of | 28,983 | 5.1 ppb |
| Port Huron Township | 10,654 | 1.4 ppb |
| Fort Gratiot Township | 10,640 | 1.2 ppb |
| Marysville, City Of | 9,959 | 2 ppb |
| Clay Township | 9,866 | 3.44 ppb |
| Ira Township | 6,510 | 1.1 ppb |
| St. Clair Water And Sewer Authority | 5,847 | 8 ppb |
| St. Clair, City Of | 5,464 | 2 ppb |
| Kimball Township | 5,170 | 0 (not detected) |
| Marine City | 4,652 | 2.3 ppb |
What to do in your house
Look up your address in St. Clair Township'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 St. Clair Township 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. A zero today does not rule out a jump later - the rules are tightening in 2027.