Clay Township, MI
Lead detected, under the action levels
Latest 90th-percentile lead: 3.44 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 Clay Township
Clay Township serves about 9,866 people through 4,700 service connections, which makes it a medium-sized 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: MI0001450; phone on file: 810-794-3475. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2020 (3.53 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Clay Township is 5 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 3.44 ppb |
| 2020 | 3.53 ppb |
| 2017 | 5 ppb |
Where this result ranks
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. Clay Township's 3.44 ppb sits at the 80th percentile in Michigan and the 85th nationally (higher means more lead).
Neighbouring systems
22 other systems share St. Clair County; 3 of them have a higher latest lead result than Clay 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 |
| 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 |
| Algonac, City Of | 4,110 | 3.3 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Algonac, 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 Clay 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. 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.