Terrace Ii Mhc, MI
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). 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.
About Terrace Ii Mhc
Terrace Ii Mhc serves about 320 people through 128 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Natrona County, Michigan. EPA system ID: WY5601622; phone on file: 248-626-0737. They can tell you what your service line is made of and whether they pay to replace it.
Terrace Ii Mhc's lead record
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Terrace Ii Mhc is 10 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 10 ppb |
| 2016 | 0 (not detected) |
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. Terrace Ii Mhc's reported as 0 (not detected) sits at the 16th percentile in Michigan and the 19th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Natrona County
3 other systems share Natrona County; 2 of them have a higher latest lead result than Terrace Ii Mhc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Terrace I Mhc | 336 | 0 (not detected) |
| Hidden Hills Mhp | 324 | 1 ppb |
| Green Valley Mhp | 265 | 1 ppb |
Your move
Look up your address in Terrace Ii Mhc'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 Terrace Ii Mhc 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. A zero today does not rule out a jump later - the rules are tightening in 2027.