Linn Grove Water Works, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 2.3 ppb (monitoring period 2025-2025). 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.
Who runs the water here
Linn Grove Water Works serves about 163 people through 95 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Buena Vista County, Iowa. EPA system ID: IA1147085; phone on file: 712-296-0918. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is up 2.3 ppb from 0 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Linn Grove Water Works is 2.3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.3 ppb |
| 2025 | 0 (not detected) |
| 2021 | 2.2 ppb |
| 2018 | 2 ppb |
Against other Iowa systems
Of the 1,066 Iowa systems with a lead result, the median latest reading is 1.4 ppb; 4 are over 15 ppb right now and 36 have gone over at some point. Linn Grove Water Works's 2.3 ppb sits at the 70th percentile in Iowa and the 76th nationally (higher means more lead).
Neighbouring systems
10 other systems share Buena Vista County; 1 of them has a higher latest lead result than Linn Grove Water Works. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Storm Lake Water Treatment Plant | 11,431 | 0 (not detected) |
| Alta Municipal Water Plant | 2,087 | 0 (not detected) |
| Sioux Rapids Water Department | 932 | 6.5 ppb |
| Newell Water Treatment Plant | 921 | 1.1 ppb |
| Lakeside Water Supply | 700 | 0.7 ppb |
| Albert City Muni Water Supply | 677 | 1.4 ppb |
| Marathon Light & Water Department | 230 | 2 ppb |
| Rembrandt Water Supply | 209 | 0 (not detected) |
| Lake Creek Homeowners Association | 175 | 0.1 ppb |
| Truesdale Water Supply | 69 | 0 (not detected) |
Next steps for Linn Grove, IA
Test your own tap with a certified lab first-draw sample; Linn Grove, IA 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 Linn Grove Water Works 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. Systems that went over once often dip back under; here is what that means.