Sloan Water Supply, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 0.93 ppb (monitoring period 2024-2026). 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.
Sloan Water Supply at a glance
Sloan Water Supply serves about 1,042 people through 465 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 Woodbury County, Iowa. EPA system ID: IA9780059; phone on file: 712-490-3947. 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 down 5.7 ppb from 6.63 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Sloan Water Supply is 6.63 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0.93 ppb |
| 2023 | 6.63 ppb |
| 2020 | 3 ppb |
| 2017 | 4 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. Sloan Water Supply's 0.93 ppb sits at the 38th percentile in Iowa and the 50th nationally (higher means more lead).
Nearby utilities
16 other systems share Woodbury County; 10 of them have a higher latest lead result than Sloan Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sioux City Water Supply | 85,791 | 2 ppb |
| Sergeant Bluff Water Supply | 5,015 | 4 ppb |
| Moville Water Supply | 1,687 | 0.82 ppb |
| Lawton Water Supply | 988 | 4.3 ppb |
| Correctionville Water Supply | 766 | 0.8 ppb |
| Anthon Municipal Water System | 545 | 1.8 ppb |
| Pierson Water Supply | 345 | 0.8 ppb |
| Danbury Water Supply | 320 | 1.2 ppb |
| Salix Water Supply | 295 | 0.6 ppb |
| Bronson Water Supply | 294 | 1.9 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Sloan, 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 Sloan Water Supply 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. Systems that went over once often dip back under; here is what that means.