Red Rock Rural Water System, MN
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (monitoring period 2022-2024). 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
Red Rock Rural Water System serves about 5,840 people through 2,559 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 Cottonwood County, Minnesota. EPA system ID: MN1170009; phone on file: 5076284201. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2021 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Red Rock Rural Water System is 2 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2 ppb |
| 2021 | 2 ppb |
| 2018 | 0 (not detected) |
How Red Rock 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. Red Rock Rural Water System's 2 ppb sits at the 75th percentile in Minnesota and the 72nd nationally (higher means more lead).
Neighbouring systems
8 other systems share Cottonwood County; 4 of them have a higher latest lead result than Red Rock Rural Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Windom | 4,646 | 3 ppb |
| Mountain Lake | 2,018 | 0 (not detected) |
| Westbrook | 785 | 11 ppb |
| Jeffers | 369 | 0 (not detected) |
| Storden | 215 | 0 (not detected) |
| Bingham Lake | 128 | 3 ppb |
| Delft | 58 | 4 ppb |
| Neuhof Hutterian Brethren | 55 | 0 (not detected) |
Next steps for Jeffers, MN
Test your own tap with a certified lab first-draw sample; Jeffers, 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 Red Rock 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.