Port Huron, City Of, MI
Lead detected, under the action levels
Latest 90th-percentile lead: 5.1 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 Port Huron, City Of
Port Huron, City Of serves about 28,983 people through 12,992 service connections, which makes it a large 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: MI0005480; phone on file: 810-984-9730. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 4.3 ppb from 9.4 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Port Huron, City Of is 9.4 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 5.1 ppb |
| 2020 | 9.4 ppb |
| 2017 | 7.1 ppb |
How Port Huron, City Of 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. Port Huron, City Of's 5.1 ppb sits at the 89th percentile in Michigan and the 91st nationally (higher means more lead).
Other water systems in St. Clair County
22 other systems share St. Clair County; 2 of them have a higher latest lead result than Port Huron, City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| 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 |
| Algonac, City Of | 4,110 | 3.3 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Port Huron, 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 Port Huron, 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. The lead result guide covers how utilities pick the homes they sample. The action level is dropping - the 10 ppb rule from 2027.