Colonial Acres, MI
Lead detected, under the action levels
Latest 90th-percentile lead: 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.
Who runs the water here
Colonial Acres serves about 265 people through 106 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Cass County, Michigan. EPA system ID: MI0040094; phone on file: 269-663-2424. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
The highest 90th-percentile result EPA holds for Colonial Acres is 1 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1 ppb |
How Colonial Acres 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. Colonial Acres's 1 ppb sits at the 45th percentile in Michigan and the 52nd nationally (higher means more lead).
Nearby utilities
15 other systems share Cass County; 5 of them have a higher latest lead result than Colonial Acres. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Dowagiac | 6,350 | 6 ppb |
| Cassopolis | 1,815 | - |
| Cass County Water System | 1,350 | 0 (not detected) |
| Edwardsburg | 1,260 | 3.4 ppb |
| Marcellus | 1,198 | 3.9 ppb |
| Bair Lake Bible Camp | 372 | 0 (not detected) |
| Eagle Lake Estates Mhp | 230 | 3.6 ppb |
| Linden Mobile Home Park | 92 | 0 (not detected) |
| White Pines Mobile Home Park | 90 | 0 (not detected) |
| Colony Bay Condominiums | 75 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Edwardsburg, 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 Colonial Acres 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. 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.