Chateaux Du Lac Condominiums, MI
Above the federal action level
Latest 90th-percentile lead: 16 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. In the most recent monitoring period, more than 10% of the sampled homes measured above 15 ppb. Use a filter certified to NSF/ANSI 53 for lead for drinking and cooking now, and test your own tap.
Who runs the water here
Chateaux Du Lac Condominiums serves about 80 people through 43 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Genesee County, Michigan. EPA system ID: MI0001353; phone on file: 810-953-1000. They can tell you what your service line is made of and whether they pay to replace it.
Chateaux Du Lac Condominiums's lead record
That is down 9 ppb from 25 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Chateaux Du Lac Condominiums is 102 ppb across 5 monitoring periods, 5 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 16 ppb over 15 |
| 2025 | 25 ppb over 15 |
| 2024 | 102 ppb over 15 |
| 2024 | 16 ppb over 15 |
| 2023 | 39 ppb over 15 |
How Chateaux Du Lac Condominiums 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. Chateaux Du Lac Condominiums's 16 ppb sits at the 98th percentile in Michigan and the 99th nationally (higher means more lead).
Neighbouring systems
33 other systems share Genesee County; 1 of them has a higher latest lead result than Chateaux Du Lac Condominiums. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Flint, City Of | 81,252 | 3 ppb |
| Genesee County Water System | 73,726 | 0 (not detected) |
| Burton, City Of | 21,000 | 0 (not detected) |
| Charter Township Of Grand Blanc | 21,000 | 0 (not detected) |
| Fenton, City Of | 11,746 | 1 ppb |
| Beecher Metropolitan District | 9,400 | 3 ppb |
| Genesee Township | 8,473 | 0 (not detected) |
| Flushing, City Of | 8,311 | 0 (not detected) |
| Grand Blanc, City Of | 8,276 | 4 ppb |
| Swartz Creek, City Of | 5,800 | 0 (not detected) |
Next steps for Grand Blanc, MI
Use a filter certified to NSF/ANSI 53 for lead on the tap you drink and cook from, now, before you test. Then test your own tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Chateaux Du Lac Condominiums whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1400 ppb (copper action level 1,300 ppb).
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. Size matters more than most people expect: small vs large water systems.