Zimmerman, MN
Lead detected, under the action levels
Latest 90th-percentile lead: 2 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.
Zimmerman at a glance
Zimmerman serves about 6,772 people through 1,716 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 Sherburne County, Minnesota. EPA system ID: MN1710006; phone on file: 7638564666. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Zimmerman's lead record
Against the period ending 2023 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Zimmerman is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2 ppb |
| 2023 | 2 ppb |
| 2020 | 3 ppb |
| 2017 | 3 ppb |
Against other Minnesota systems
Of the 966 Minnesota systems with a lead result, the median latest reading is 0 ppb; 7 are over 15 ppb right now and 48 have gone over at some point. Zimmerman's 2 ppb sits at the 75th percentile in Minnesota and the 73rd nationally (higher means more lead).
Other water systems in Sherburne County
8 other systems share Sherburne County; 0 of them have a higher latest lead result than Zimmerman. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Elk River | 19,532 | 2 ppb |
| Big Lake | 13,056 | 1 ppb |
| Becker | 5,034 | 0 (not detected) |
| Clear Lake | 802 | 1 ppb |
| Sherburne Village | 200 | 0 (not detected) |
| Ridges Of Rice Lake Housing Development | 180 | 0 (not detected) |
| Shores Of Eagle Lake | 160 | 0 (not detected) |
| Windsor Oaks Development | 80 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Zimmerman, MN 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 Zimmerman 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. The action level is dropping - the 10 ppb rule from 2027.