Marshall-Polk Rural Water System, MN
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (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. 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.
Marshall-Polk Rural Water System at a glance
Marshall-Polk Rural Water System serves about 3,295 people through 1,455 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Marshall County, Minnesota. EPA system ID: MN1450005; phone on file: 2187455471. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Marshall-Polk Rural Water System's lead record
That is up 2 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Marshall-Polk Rural Water System is 2 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2 ppb |
| 2022 | 0 (not detected) |
How Marshall-Polk Rural Water System compares
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. Marshall-Polk Rural Water System's 2 ppb sits at the 74th percentile in Minnesota and the 72nd nationally (higher means more lead).
Nearby utilities
11 other systems share Marshall County; 0 of them have a higher latest lead result than Marshall-Polk Rural Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Warren | 1,551 | 0 (not detected) |
| Stephen | 568 | 0 (not detected) |
| Argyle | 533 | 0 (not detected) |
| Alvarado | 377 | 2 ppb |
| Newfolden | 338 | 2 ppb |
| Middle River | 299 | 0 (not detected) |
| Oslo | 242 | 0 (not detected) |
| Grygla | 179 | 0 (not detected) |
| Viking | 85 | 0 (not detected) |
| Holt | 84 | 0 (not detected) |
Next steps for Warren, MN
Test your own tap with a certified lab first-draw sample; Warren, 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 Marshall-Polk Rural Water System 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. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.