Pennfield Township, MI
Lead detected, under the action levels
Latest 90th-percentile lead: 1.6 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. 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 Pennfield Township
Pennfield Township serves about 3,916 people through 665 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 groundwater, in Calhoun County, Michigan. EPA system ID: MI0004760; phone on file: 269-441-2482. They can tell you what your service line is made of and whether they pay to replace it.
Pennfield Township's lead record
Against the period ending 2025 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Pennfield Township is 12 ppb across 9 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.6 ppb |
| 2025 | 2 ppb |
| 2024 | 1.5 ppb |
| 2023 | 2.3 ppb |
| 2022 | 2.3 ppb |
| 2021 | 3 ppb |
| 2020 | 1 ppb |
| 2019 | 1 ppb |
| 2018 | 12 ppb over 10 |
Against other Michigan systems
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. Pennfield Township's 1.6 ppb sits at the 57th percentile in Michigan and the 65th nationally (higher means more lead).
Neighbouring systems
16 other systems share Calhoun County; 4 of them have a higher latest lead result than Pennfield Township. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Battle Creek - Verona System | 43,975 | 2 ppb |
| Albion | 9,144 | 1 ppb |
| Marshall | 7,088 | 2 ppb |
| Springfield | 3,833 | 0 (not detected) |
| Emmett Township | 2,550 | 0 (not detected) |
| Homer | 1,668 | - |
| Athens | 956 | - |
| Bedford Hills | 850 | 0 (not detected) |
| Tekonsha | 722 | 0 (not detected) |
| Hickory Hills | 708 | 2.13 ppb |
Next steps for Battle Creek, MI
Test your own tap with a certified lab first-draw sample; Battle Creek, 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 Pennfield 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Size matters more than most people expect: small vs large water systems.